Is Castro Urdiales good for beginners?

Only the Ostende / Brazomar rocky beach edges fit that role, and only in settled sea.

Which swell direction is bad?

Northwest to northeast is the bad sector, with north-northwest the worst axis.

What is the sea bass size here?

In the Cantabrian-Northwest caladero, sea bass is 42 cm.

Are there protected species?

Seahorses are protected, and undersized catch must not be kept.

Castro Urdiales spearfishing forecast — Spain

Q: Do I need a licence?

Yes. In Cantabria, the 2nd-class licence enables spearfishing.

Castro Urdiales · Spain

5.1

visibility: 1 m

visibility1m

Today — right on the edge.

Sources: IPMA · buoys · Copernicus · Sentinel-2 — high confidence · data 20:55

Sources & confidence

Sources: IPMA · NDBC & IH buoys · Copernicus Marine · Sentinel-2
Method: spearo sea-state engine: 6-model consensus + satellite clarity (ZSD) + buoy-bias checks
Freshness: Re-read every hour, per coast

Compiled by the spearo sea-state engine · How it works →

The verdict comes from seven water factors and hard safety gates — not ten tabs. Go or stay.

How we score the water

Our own model

Our own forecast engine — not a third-party widget. It weighs these water factors into one go-or-stay verdict for this coast; the 0–10 dial is that verdict, read out as a number.

Swell & wave memory: Height, period and direction of the swell, plus the wake of recent storms — an old storm still stirs the water, and the engine remembers.
Wind & gusts: Speed and gusts, hour by hour — wind speed and an onshore push chop the surface and cut visibility.
Tide phase: Timing and range of the tide, calibrated per coast — big spring tides pull the verdict toward caution.
Water temperature: Sea-surface temperature — sharply cold water vetoes a green verdict.
Currents & outflow: Direction and drift of the current — it pushes you, and it drags turbid coastal water across where you dive.
Rain runoff & air clarity: Rain muddies the water inshore through land runoff, while fog and haze cut visibility at the surface.
Coast shape & exposure: How the coast faces the swell — a sheltered cove keeps the water clean; an exposed, head-on point takes a penalty.

Safety gates

Thunderstorm forecast — an instant red, no exceptions.
An official warning (MeteoAlarm / IPMA) — yellow, or red for the higher ranks.
Missing input data — a would-be green is capped to yellow rather than overstated.
Strong disagreement between forecast models — a green day is pulled back to yellow.
Night hours — where night spearfishing is banned by law the window is forced red; where it is legal (Australia outside NSW, New Zealand, South Africa) it is capped at yellow, never green.

It all folds into a single 0–10 score and one verdict: go or stay.

A forecast, not a guarantee — the sea has the last word.

Where to get in, where to hunt

Entry points with coordinates

Seabed relief — promising ground

This verdict — in your pocket. Open the app for the week's window.

Google Play — QR code — point your camera

0 m

Surface

Wind, wave and the swell windows — when to go and the best hours.

spearo.app

no dataupdated 20:55

Castro Urdiales — solo, off the rocks

Day is over

That is it for today — the day's windows have closed.

Tomorrow, best window 09:00–12:00

Before entering, check the camera and the surge

Whole week — tap a day. is driving swell right now.

Solo risk: carry a float · tell someone your plan and exit time · doubt = don't go. A model-based planner; the call is made on site.

Selected day

Windows, hours
and the day's trends.

The day is picked above, in the hero. Here are that day's windows, the hour-by-hour map and the trends. Tap a window to break down the conditions.

Wednesday · today2026-09-09

07:45–20:33 · new moon

▲ 04:00▼ 09:00▲ 16:00▼ 22:00mid-range tides · 3.6 m

Hours (06→20)

Day's trends

Tide-1.96 m

Wave1.18 m

Wind4 km/h

Water22 °C

fish activity: moonrise 05:33 · moderate · moon overhead 12:50 · high · moonset 19:47 · moderate · moon underfoot 00:00 · high

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Where to get in
off the rocks.

Scouted entries, coloured by today. The colour is the sea state at the spot, not a guarantee: the wash and a slippery entry you judge on site.

Open the seafloor map

Cabo de SonabiaCastro Urdiales

dangerous

exposed head-on to the swell today (city-level)

window: This cape asks for dawn and a high-pressure day: as soon as the northwest breeze fills in, the day is over. Autumn is the best season, mild water and the Agüera running low. Sunset to sunrise is banned, and pollack cannot be taken from 1 January to 30 April.
tide: On springs the range goes past four metres and completely changes the access: near high water you get in off the rock without drama, and at low water you have to cross a long, slippery boulder field. On the ebb there is noticeable current along the cape, so plan your way back.
shelter: The cape rises at the foot of Monte Candina and faces north: the sector from 310° to 60° comes in whole and the worst heading, 340°, hits the wall with nothing in front. The massif blocks the south, so with a land wind the water sits still under the cliff.
conditions: This is some of the cleanest ground on the stretch: live rock, little sediment and, on a genuinely calm day, seven or eight metres of visibility. What pulls it down is the Agüera outflow in the Oriñón inlet right next door: with the river up, brown water clings to the shore.
hazard: Isolated place with no reliable phone coverage: you do not come here alone. Candina drops rock onto the beach and is a protected area with a vulture colony, so respect any path closures. The ground swell arrives without wind and washes the foot of the cape; if in doubt, do not go down.
access: You get there on the Sonabia road, park in the village and walk down to the little beach at the foot of the mountain. From there you swim east along the base of the cape, three or four hundred metres. There is no intermediate exit along the cliff: you come back to the same sand.

Cliff and rock to the east; very exposed, advanced.

Google Maps

Cala El PedregalCastro Urdiales

dangerous

Ultra · subscribers

exposed head-on to the swell today (city-level)

window: —

The full spot briefing is part of the subscription: entry, bottom, hazards, tide window.

Open in the app

Cala de CotolinoCastro Urdiales

dangerous

Pro · subscribers

exposed head-on to the swell today (city-level)

window: —

The full spot briefing is part of the subscription: entry, bottom, hazards, tide window.

Open in the app

Cala de DicidoCastro Urdiales

dangerous

Pro · subscribers

exposed head-on to the swell today (city-level)

window: —

The full spot briefing is part of the subscription: entry, bottom, hazards, tide window.

Open in the app

Cerdigo / IslaresCastro Urdiales

dangerous

exposed head-on to the swell today (city-level)

window: Cantabria has no weekday closure, so any day works, but in August the Arenillas campsite fills the beach and it pays to start at dawn. The best season runs June to October; pollack, remember, is closed from January to April and then it is two fish only.
tide: With over four metres on springs, the Cerdigo ledges are left dry at low water and the approach turns into a long walk over weed-covered stone that is as slippery as soap. In some coves you can only get in comfortably near high water; check the table before you go down.
shelter: The stretch from Cerdigo to Islares, with Arenillas beach in the middle, faces north-northeast and takes everything that comes down from 310° to 60°. The rocky point at Cerdigo cuts some of the west and leaves usable coves, but with a northerly sea the whole coast breaks against the ledges.
conditions: The drop-offs along this coast hold visibility well, five or six metres on a decent day, because the bottom is rock rather than loose sand. What spoils it is the Agüera, which flows out at Oriñón a little to the west: after a spate the brown water runs this far.
hazard: Over the ledges the ground swell explodes without the wind warning you, and the galerna drops out of the northwest in a matter of minutes. Access runs off the N-634 and across some private land: ask permission and do not leave the car on the road. The second-class licence is compulsory.
access: Park up on the top, by Cerdigo or at the entrance to Islares, and drop down short tracks to the coves; there are several, and not all have a comfortable exit. The safest is to get in over the Arenillas sand and swim east, two or three hundred metres out to the rock.

Rocky shore to the east; coves and drop-offs, rich grounds, exposed to the NW.

Google Maps

Playa de OrinonCastro Urdiales

dangerous

Pro · subscribers

exposed head-on to the swell today (city-level)

window: —

The full spot briefing is part of the subscription: entry, bottom, hazards, tide window.

Open in the app

Punta LamieCastro Urdiales

dangerous

Ultra · subscribers

exposed head-on to the swell today (city-level)

window: —

The full spot briefing is part of the subscription: entry, bottom, hazards, tide window.

Open in the app

Punta de Santa AnaCastro Urdiales

dangerous

exposed head-on to the swell today (city-level)

window: The thing is to get in early, before the fleet goes out and the harbour mouth fills with traffic, and to make the most of autumn, with the water still at seventeen or eighteen degrees. Sunset to sunrise is banned across Spain, and pollack is off limits from 1 January to 30 April.
tide: With a four and a half metre spring range, the rock platform at the foot of the castle dries out at low water and shows you where to get in. On the ebb there is a clear rush between the Santa Ana islet and the bridge: if you cross it, do it at slack water.
shelter: The point that carries Santa Ana castle and the church faces north, with the bad sector between 310° and 60°: the 340° northwest comes in unchecked. The harbour breakwater to the southwest blocks the land wind, but sea from the first quadrant wraps around the point anyway.
conditions: The rocky ground below the castle has cracks between ten and twenty metres where conger and the odd grouper hide; with a flat sea you see well there. What clouds it is the harbour churn and the town's runoff after rain: two dry days and it clears again.
hazard: You are right by the mouth of a working harbour: fishing boats and pleasure craft come and go, and you must leave 300 metres to professionals at work. Carry the buoy high and red or orange, and check where the port zone ends, because inside it spearfishing has no business.
access: You go down from the Santa María church promenade over the stone ramps to the water, on the eastern face of the point; the rock is slick with green slime. The other option is to get in over the Brazomar sand and swim towards the castle, four or five hundred metres close to the shore.

Rocky ground below the castle; grouper and conger in the cracks (10-20 m), exposed to the N.

Google Maps

Roquedo de Ostende / BrazomarCastro Urdiales

dangerous

exposed head-on to the swell today (city-level)

window: From June to September these are lifeguarded beaches with a buoyed bathing zone: the only option is to get in at the very first hour, and even then outside the markers. The rest of the year any daylight hour works, with the bonus that winter water is clearer.
tide: At a spring low the rock benches at both ends of Ostende come out and you walk to the edge without wetting your knees. At a spring high the sand shrinks to a strip against the promenade wall and you have to get in from the steps.
shelter: The two town beaches sit inside the Castro bight: Santa Ana point and the harbour cover the east, and the town itself cuts the south. What comes straight in is north and northwest, and with that sector the rocky ends of Ostende break and there is nothing to be done.
conditions: It is a shallow spot, three to eight metres, with low rock and weed beds at the ends: it works for learning and for your first fish, not for looking for depth. Suspended sand rules here: after two calm days you get four or five metres, with any waves you get one.
hazard: The risk here is not the sea, it is the people: swimmers, paddleboards and rod anglers on the points. Do not enter the buoyed area, carry a red or orange float and never get more than 25 metres from it. After a storm the town's overflows dirty the water; better to wait.
access: You park along the Brazomar promenade or near the Ostende playing field and drop to the sand by ramps and steps, all easy. Walk to whichever rocky end suits the wind and get in off the low stone; with any waves, get in and out over the sand and not the rock.

Rocky ends of the town beaches; semi-sheltered, good for beginners.

Google Maps

SOLO is the biggest risk: underwater you can black out from lack of oxygen silently and fatally, with no one around. Solo is never truly «safe». Below are the best weather windows; carry a buoy, tell someone your plan and exit time, and any doubt — don't go.

Look at the water
right now.

Check the cam BEFORE you leave. Foam, brown/green murk, or waves washing the entry rocks = No-go. At night/in fog the cam is useless — treat it as «unknown», NOT «green».

connecting to the stream…

● LIVE↗

Castro Urdiales — Bahía y casco viejo (webcamsencantabria)Live cam (Castro Urdiales bay) — live stream.camera: official ↗

connecting to the stream…

● LIVE↗

Castro Urdiales — Muelle Don Luís (webcamsencantabria)Live cam (Don Luís dock) — live stream.camera: official ↗

What's in season,
what the law says.

Minimum sizes by caladero (in the table below). Season depends on the species and place.

In season now

European seabass
Dicentrarchus labrax · Cantabrian & NW · RD 347/2011 art. 4 bis
gilthead seabream
Sparus aurata · Cantabrian & NW · RD 560/1995 Anexo I
salema / saupe
Sarpa salpa · Cantabrian & NW · RD 560/1995 Anexo I
⚠️ Do NOT eat the head/guts (ichthyosarcotoxism).
bogue
Boops boops · Cantabrian & NW · RD 560/1995 Anexo I
black seabream
Spondyliosoma cantharus · Cantabrian & NW · RD 560/1995 Anexo I
grey mullet
Mugil / Chelon spp. · Cantabrian & NW · RD 560/1995 Anexo I
red porgy
Pagrus pagrus · Cantabrian & NW · RD 560/1995 Anexo I
striped red mullet
Mullus surmuletus · Cantabrian & NW · RD 560/1995 Anexo I
common octopus
Octopus vulgaris · Cantabrian & NW · 1 kg
Talla por PESO: mín. 1 kg (RD 560/1995, todos los anexos). No coger hembras con huevos.
European conger
Conger conger · Cantabrian & NW · RD 560/1995 Anexo I
pollack
Pollachius pollachius · Cantabrian & NW · closed 1 Jan–30 Apr
Talla operativa 42 cm; máx. 2 ejemplares/día (medida recreativa anual de la UE, Reg. 2025/202). ⚠️ Atlantic: recreational CLOSED 1 Jan–30 Apr (catch-and-release).

Law

✓Spearfishing licence mandatory; the AUTONOMOUS COMMUNITY issues it (not the State) and it is valid in the exterior waters of the whole coast. Free-diving only — scuba is banned (, art. 3).
✓Spearfishing catch may not be sold or traded — it is non-commercial fishing ().
✓Night prohibited: spearfishing only in daylight (sunset to sunrise not allowed) — , art. 16.d.
✓Marker buoy MANDATORY: mark your position with a clearly visible buoy and stay within 25 m of it — , art. 15.
✓Never keep the speargun loaded out of the water — , art. 16.a.
✓Keep at least 300 m from professional fishing vessels that are working — , art. 12.b.
✓The state act (, art. 16) bans, for spearfishing: a loaded gun out of the water; explosive/electric points and lamps (hand torches excepted); underwater scooters; night — from sunset to sunrise. Plus art. 12 b), d), e): 300 m from professional fishing vessels, light as an attractant, poisons/explosives. A ban in a PARTICULAR reserve, port or beach comes from that place's OWN instrument (the reserve's order, the autonomous community's rules, the port authority) — see the no-take zones on the map and your community's rules.
✓Min. sizes by ( + + EU 2019/1241): sea bass 42 cm (rec.) / 36 cm / 25 cm Mediterranean / 22 cm Canaries; gilthead bream 20 cm and white seabream 23 cm in the Mediterranean (EU 2019/1241); grouper 45 cm. See your zone's species card.
✓Only species in Annex I of may be taken; keeping, landing or transporting undersized specimens is prohibited.
✓The licence needs a medical fitness certificate for free-diving and civil-liability insurance (or a federative licence, which includes it). Mandatory in the Basque Country/Murcia/Asturias/Galicia; the federative licence covers it in Galicia/Balearics/Cantabria; the Canaries and Andalusia do NOT require it for the individual licence (a responsible health declaration). Minimum age generally 16 (14 in Andalusia).

Safety protocol

Sets: watch the wave trains ≥15 min before entering; Hmax ≈ 2×Hs, the wash can run 50 m past the foam line. A lull >10 min with period >12 s = a big set «overdue», do NOT enter; enter right after a full set passes and re-check at minute 30.
Exit FIRST: find your exit AND a backup before entering. On a rocky/boulder shore a 0.5 m rise in swell can make the exit impossible — getting pinned/unable to climb out is the main killer.
Headland rip: prominent points often have a permanent topographic rip regardless of the model — locate it, enter/exit on the windward side, never swim against it.
Cold: wetsuit per the SST chip; the first shiver = a metabolic surge and a drop in breath-hold → get out at the first steady shiver. Cap the session at 45–60 min below 15 °C.
Solo discipline: buoy up; tell someone the spot and exit time; conservative breath-hold (never push it in cold/murky/surfy water); visibility <3 m — don't enter.
Afternoon wind: on many coasts the wind builds from midday — plan to be out of the water by midday; the chop builds — get out.
UV 11:00–15:00 (UVI ≥6): sunscreen and cover up on the surface interval.
Solo is a fundamental risk (hypoxic blackout with no buddy). Any doubt = No-go.

Spearfishing in Castro Urdiales: spots, seasons and rules

Updated 2026-07-09 · By Oleksandr, spearfisher

Spearfishing in Castro Urdiales is shore-entry rock hunting on an exposed Cantabrian coast. The practical split is simple: Ostende / Brazomar is the cautious beginner option, Punta de Santa Ana has cracks below the castle, Cerdigo / Islares gives coves and drop-offs to the east, and Cabo de Sonabia is advanced cliff-and-rock ground. The coast faces north, with the bad sector from northwest through northeast, so do not treat a calm-looking town beach as proof that the points are safe. In Cantabria, the 2nd-class licence enables spearfishing, and the Cantabrian-Northwest size table applies.

Best legal spearfishing spots near Castro Urdiales

These shore-entry zones should only be used with settled sea, a visible buoy and confirmed local limits.

Spot	Type	Depth	Level	Access	Notes
Ostende / Brazomar rocks	Rocky beach edges	Shore rock in shallow water	Careful beginner	From the beach edge, away from bathers	Semi-sheltered and the easiest learning choice when bathing areas are not busy.
Punta de Santa Ana	Rocky ground below the castle	Mid-depth cracks	Intermediate	Shore entry with a clear exit route	Grouper and conger are noted in the cracks, but the point is exposed to the north.
Cerdigo / Islares	Rocky shore to the east	Rock ledges and drop-offs	Intermediate	From the cove, away from bathing areas	Rich ground, exposed to northwest swell, so use it only with a settled sea.
Cabo de Sonabia	Cliff and rocky shore	Shore rock in shallow water	Advanced	Demanding cliff and rock access	Very exposed and not a training spot.

Castro Urdiales spearfishing forecast — wind, swell, visibility, tides & live cameras

Windows, hours and the day's trends.

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The forecast is the plan.The call is on the rock.

Where to get in off the rocks.

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What's in season, what the law says.

TL;DR

Best legal spearfishing spots near Castro Urdiales

Setúbal · Arrábida

Alentejo

Algarve

Madeira

Azores

Spain

Galicia

Cantabrian coast

Andalusia (Atlantic)

Andalusia (Med)

Murcia

Levante

Catalonia

Balearics

Canaries

🇮🇹Italy

Liguria

Tuscany

Lazio

Campania

Calabria

Apulia

Sicily

Sardinia

Central Adriatic

Abruzzo

Emilia-Romagna

Northern Adriatic

🇬🇷Greece

Attica · Saronic

Peloponnese

Crete

Cyclades

Dodecanese

NE Aegean

Sporades · Evia

Ionian

Halkidiki & Thermaikos

Thrace · Kavala

🇫🇷France

Hauts-de-France

Normandy

North Brittany

West Brittany

South Brittany

Pays de la Loire

Charente-Maritime

Aquitaine (Arcachon)

French Basque Country

Occitania

Provence — Côte d'Azur

Corsica

🇹🇷Turkey

Marmara

North Aegean

İzmir

South Aegean

West Mediterranean (Turkey)

Central Mediterranean (Turkey)

Hatay (Gulf of İskenderun)

West Black Sea

Central Black Sea

East Black Sea

🇭🇷Croatia

Windows, hours
and the day's trends.

A marine instrument,
go / no-go for solo hunting.

The forecast is the plan.
The call is on the rock.

Where to get in
off the rocks.

Look at the water
right now.

What's in season,
what the law says.