Viana do Castelo spearfishing forecast — wind, swell, visibility, tides & live cameras

Viana do Castelo · Portugal
5.3
wave 0.4 m head-on
visibility4m

Today — right on the edge — wave, wind and visibility.

Sources: IPMA · NDBC · Copernicus — high confidence · data 13:10

Sources & confidence

Sources
IPMA · NDBC buoys · Copernicus Marine
Method
Model consensus, read per window
Freshness
Re-read every hour, per coast

Compiled by the spearo sea-state engine

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 — forced red; the window is closed after dark.

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.

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0 m

Surface

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

spearo.app
calmupdated 13:10
Viana do Castelo — solo, off the rocks
BORDERLINE
caution — solo off the rocks is risky, check on site · northerly wind picks up after midday
wave 0.4 m head-onwind 11, gusts 25 km/hvisibility ~6 mwindow 12:00–21:00
today, best window 15:00–18:00
fish · Visibility 6 m · Water 21.9°C
confidence medium · verdict for the selected day
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 · today2026-07-22
06:20–21:03 · first quarter
▼ 03:00▲ 09:00▼ 16:00▲ 22:00 · 1.4 m
Hours (06→20)
12
15
18
Day's trends
Tide0.13 m
Wave0.42 m
Wind4 km/h
Water22 °C
fish activity: moonset 00:35 · moderate · moon underfoot 08:00 · high · moonrise 15:26 · moderate · moon overhead 20:10 · high
Conditions window12:00–15:00
caution — solo off the rocks is risky, check on site fish ·
Hs 0.46 mperiod 5.1 s head-onwind 10→23surge 0.9viz 5 m
0.46 mup to ~0.92 · 326° head-on
5.1 sswell moderate
10→23gusts 23 km/h
0.9weak surge
0.19m/s
5 mrecent swell
21.4°C5 mm + hood
▼16:00tide falling
Atmosphere34 kmovercast
moderatemoonrise
  • northerly wind picks up after midday
  • ebb — weaker inshore
confidence mediumday
Open the seafloor map with entry points

Your best window — with you. Forecast in your pocket.

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Android beta — QR code
point your camera
−10 m

The water column

Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.

What it is

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

spearo.app folds wind, wave, swell period, visibility, tides, water temperature and risk into a single verdict — go to the spot or not. It computes 7 days ahead from open marine models (Open-Meteo, IPMA), with no sign-up and no accounts. Built for solo spearfishing off the rocks, where any mistake costs dearly.

Now live: 1152 spots across 189 stretches of coast — mainland Portugal, Madeira and the Azores.

See all spots
−20 m

The seabed

Relief and bottom type, tides, and the depths of each spot.

On the rock

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

The models set the window. Whether you go in is read only at the water: count the sets, watch the surge on the entry. If in doubt, you don't get in.

Entry points

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
Praia do Porto de VinhaAreosa rocky cove
borderline
exposed head-on to the swell today
window
Early morning, flat sea, late spring to early autumn. Quiet rocky shore within Areosa.
tide
High/incoming water — covers the rocks and reef; at low tide little water and sharp rocks on the exit.
shelter
Small cove with a rock barrier that breaks the main swell — a relatively sheltered entry. Wind-shielded by the rocks, but not from large west swell.
hazard
Same pattern as Praia Norte: barrier rocks and shorebreak on the exit as swell builds; entrapment between blocks. Cold water, nobody around — solo is risky.
access
Off EN13 in Areosa to the small cove; short path to the rocks. Limited parking, rocky entry — reef boots essential.

Rocky cove with almost no sand and a natural breakwater — a quiet alternative to Praia Norte in the same rocky sector south of Montedor.

Google Maps
Montedor Promontory / Praia de FornelosMontedor headland, Carreço · Promontório de Montedor / Praia de Fornelos
borderline
best candidate for today
exposed head-on to the swell today
window
Early morning on a flat sea, late spring to early autumn (warmer water, bathing season). In winter swell shuts the point down nearly always.
tide
Incoming / high water: the submerged rocks cover and fish move onto the platform; at low tide the rocks dry out and entry gets dangerous.
shelter
The rocky outcrops around the headland give some cover from N wind; against direct NW swell there is no shelter — this is an exposed Atlantic point.
hazard
The dominant danger is building NW swell breaking on the outcrops: you enter calm, but the rocky exit in the shorebreak becomes a trap. Cold water and current running along the point. Boat traffic further out.
access
EN13 to Montedor/Carreço, then toward the lighthouse and down the Geoparque trail to the rocks by Praia de Fornelos. Enter off the rocks between the lighthouse and the sand — slippery, reef boots essential.

Montedor promontory is the boundary: sand to the north, rocky coast to the south. The area's best rocky reef (sea bass, bream, conger in holes), but exposed — scout from land first.

Google Maps
Pedras Ruivas (Praia Norte)Praia Norte, Monserrate / Areosa
closed
exposed head-on to the swell today
window
Early morning before bathers, and outside bathing season (1 May–31 Oct), when hunting is banned by the beach. Warmest water — late summer.
tide
High water: the tidal platforms and pools fill and you can get past the barrier; at low tide it all dries out with no water to swim.
shelter
The nearshore rock barrier breaks the bigger waves — the most sheltered entry in the area. Shielded from moderate NW swell, but not from due-west swell.
hazard
The dominant danger is entrapment/impact on the barrier rocks as swell builds: it's calm inside, but on the barrier crest the wave throws you onto sharp rock. Urban beach — many bathers.
access
In town, by the Forte da Areosa (Castelo Velho); parking close, to the water across the rock platforms. Rocks slippery with weed.

Known OWD dive site 'Pedras Ruivas' — octopus, wrasse, fish in holes. The beach core is concessioned/lifeguarded: hunting banned by the beach in season, hunt on the reefs to the side.

Google Maps
Praia do PaçôCarreço, north of Montedor
closed
exposed head-on to the swell today
window
Early morning and OUTSIDE bathing season (1 May–31 Oct) — in summer it's a concessioned lifeguarded beach, hunting banned at the beach and 300 m in front of it.
tide
High/incoming water on the rocky ends — fish move to the rocks; at low tide there's nothing on the open sand.
shelter
Sandy bay with rocks at the ends gives partial wind cover; this is already the sandy sector north of the headland — open to direct NW swell.
hazard
Exposed sandy beach = pronounced shorebreak and rip currents by the rocky ends in any swell; no reference points on sand and it drags you fast. Highest solo severity of the four.
access
Via EN13, turn to Praia do Paçô (~10 km from Viana), large car park (350 spaces), to the water on boardwalks. Hunt off the rocks at the ends, not from the centre of the beach.

Guides list the beach for line and spear fishing, but it's a lifeguarded beach: the main water is protected in season. For a solo beginner — scout from land only, hunt the rocky ends out of season.

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.

One morning glance — and you know.

Download on theApp StoreGET IT ONGoogle Play

Android: the public release is in Google Play review — leave your email and we'll send beta access today.

Android beta — QR code
point your camera
≈

Surfacing

Cameras, map and reference — to hand as you come up.

Live cameras, map & reference
Open the seafloor map →
Reference

What's in season,
what the law says.

In season now: Sea bass, White seabream, Gilthead bream, Salema, Meagre, Mullet · coming soon: Octopus (Sep)

In season now
  • Robalo (sea bass)
    <4 m · end of ebb → start of flood · dawn/dusk
    Prime target. Shy of light — pick early/twilight windows.
  • Sargo (white seabream)
    1–5 m · flood (rides the surf onto the reef) · dawn
    Dominant reef target. Visibility matters more than time of day.
  • Dourada (gilthead bream)
    1–4 m · flood over sand/weed · dawn
    Very skittish — static ambush.
  • Salema
    0–2 m · — · daytime
    Easiest target at 0–6 m. ⚠️ Do NOT eat the head/guts (ichthyosarcotoxism).
  • Tainha (mullet)
    0–2 m · — · —
    Extremely wary; murky water HINDERS it. Opportunistic, in calm coves.
  • Corvina (meagre)
    1–6 m (marginal) · — · twilight
    Near the Tagus mouth, NOT on the Guincho rocks. Adults mostly at 5–75 m. ⚠️ CLOSED 1–30 June (defeso).
  • Santola (spider crab)
    1–10 m · low water (reef shelf exposed) · calm morning (≤force 2)
    Carapace ≥12 cm. Peaks Jul–Aug. CLOSED 15.02–15.06. Limit 2 kg/day.
Law
🦀 spider crab open (season 16.06–14.02)
  • ✓Spearfishing licence required (16+), daily/monthly/annual (~€25/yr). Speargun = licence required.
  • ✓Hand-gathering shellfish with NO gear — no licence; but if a speargun is on the dive, a spearfishing licence is required.
  • ✓Night prohibited: spearfishing only in daylight (sunset→sunrise not allowed). Artificial light as a means of finding/attracting fish is banned — a torch for safety only.
  • ✓Signalling buoy MANDATORY for spearfishing: buoy/float with an «Alfa» flag (red/orange/yellow, ≥8 L), no more than 30 m from the diver.
  • ✓Spearfishing daily limit: fish + cephalopods — 15 kg (excluding the largest specimen). General rod-and-line recreational fishing — 10 kg.
  • ✓Invertebrates (including spider crab) — 2 kg/day total.
  • ✓Spider crab: min. carapace 12 cm; (closed season) 15.02–15.06 — applies to recreational gathering too.
  • ✓Min. sizes: robalo 36 cm, sargo 17 cm, dourada 19 cm, choupa 23 cm, corvina 42 cm; octopus 750 g.
  • ✓Grouper — fully protected, may not be taken.
  • ⛔ Grouper (Epinephelus) — fully protected, capture PROHIBITED.
  • ⛔ Seahorses (Hippocampus) — protected.

Rules change. Before heading out, check with DGRM / ICNF / Capitania and the defeso table.

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. At Cabo Raso/Arriba a 0.5 m rise in swell makes a boulder exit impossible — getting pinned/unable to climb out is the main killer here.
  • Headland rip: at Cabo Raso there is 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.
  • Nortada (Jun–Sep): wind builds from midday — be out of the water by ~11:00; 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.
Local guide · Viana do Castelo

Spearfishing in Viana do Castelo: spots, seasons and rules

Updated 2026-07-09 · By Oleksandr, spearfisher

Spearfishing in Viana do Castelo is possible, but only when the exposed northwest coast settles. The useful ground is rocky: Montedor for the strongest reef, Pedras Ruivas for the most sheltered urban entry, and Porto de Vinha for a quieter cove. Cold water, low visibility after swell, slippery exits and building NW surf are the main limits. Treat it as an intermediate north-Portugal spot, not a first solo dive.

TL;DR

  • Viana do Castelo is a cold, exposed north-coast window, not a casual beginner shore dive.
  • Look for rock at Montedor, Pedras Ruivas and Porto de Vinha; avoid scout-only Paçô as a recommendation.
  • Best odds are early summer mornings, small swell, light E or NE wind and a rising tide.

Best spearfishing spots in Viana do Castelo

These are the usable, non-scout entries for this coast. All still need a land check before you suit up.

SpotTypeDepthLevelAccessNotes
Montedor Promontory / Praia de FornelosExposed rocky headlandShallow to mid reefIntermediate to advancedEN13 to Montedor/Carreço, then the Geoparque trail down to the rocksBest reef structure for bass, sargo and holes, but the rocky exit closes fast on NW swell.
Pedras Ruivas (Praia Norte)Nearshore rock barrierShallow pools and platformsIntermediatePraia Norte seafront by Forte da AreosaMore sheltered than the points, but crowded and seasonal beach rules matter.
Praia do Porto de VinhaSmall rocky coveShallow reef edgesIntermediateShort path from Areosa off the EN13Quieter than Praia Norte, with a natural breakwater. Still risky solo if the swell builds.

When are Viana do Castelo conditions worth it?

Aim for late spring to early autumn, early morning, a flat or fading sea and light E/NE offshore wind. Montedor wants swell around or below 1 to 1.2 m; the Areosa coves can be slightly more forgiving, but visibility still drops after rough water. Incoming or higher tide covers the slabs and lets fish move onto the reef. Low water exposes rocks and makes exits sharper.

FAQ

Is Viana do Castelo good for beginner spearfishing?

Not really for solo beginners. The entries are cold, rocky and exposed, with exits that get dangerous as NW swell rises.

Which Viana spot is the best reef?

Montedor has the strongest rocky structure, but it is also the most exposed and needs a clean small-swell window.

How is the water visibility in Viana do Castelo?

It is swell-dependent. Long calm summer spells clear it; recent surf and stirred sediment make it poor.

Do I need a license in Portugal?

Yes. Spearfishing requires a license from age 16, and the diver must use breath-hold only.

What are the key national limits?

Use a flagged buoy within 30 m, hunt only by day, respect minimum sizes, and keep to the 15 kg daily fish and cephalopod limit.

Sources

Region: North

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