Bahía San NicolásMarcona
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Port bay N of San Juan; rock and sand 4–14 m, cold clear water when calm. Good waves and fishing/diving spots. ⚠️Coords approx.
Google MapsMarcona spearfishing forecast — wind, swell, visibility, tides & live cameras
2.5
🌫 Murky all week after the storm — the water isn't settling
visibility1m
Today — sit it out — wave, wind and surge pounding. 🌫 Murky all week after the storm — the water isn't settling
Sources: IPMA · NDBC · Copernicus — high confidence · data 14:23
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
Surface
Wind, wave and the swell windows — when to go and the best hours.
spearo.app
calmupdated 14:23
Marcona — solo, off the rocks
don't go · wave 1.9 m (occasionally up to ~3.8 m)
wave 1.9 mwind 37, gusts 63 km/hsurge pounding the rocksvisibility ~1 m
today, best window 12:00–15:00
fish · Visibility 1 m · Water 19.1°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
06:26–17:47 · first quarter
▲ 02:00▼ 08:00▲ 13:00▼ 20:00 · 0.6 m
Hours (06→20)
12
15
18
Day's trends
Tide0.17 m
Wave1.86 m
Wind26 km/h
Water19 °C
fish activity: moonset 00:38 · moderate · moon underfoot 06:30 · high · moonrise 12:15 · moderate · moon overhead 18:50 · high
Conditions window12:00–15:00
don't go fish
Hs 1.88 mperiod 8.9 swind 37→63surge 8.8viz 1 m
1.88 mup to ~3.76 · 219° at an angle
8.9 sswell moderate
37→63gusts 63 km/h
8.8pounding the rocks
0.36m/s
1 mrecent swell
19.1°C5 mm + hood
▼20:00tide turn near
Atmosphere13 kmovercast
moderatemoonrise
- wave 1.9 m (occasionally up to ~3.8 m)
- steep wind-wave — choppy surface, careful on entry
- just after high water
confidence mediumday
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 spotsThe 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
Bahías de San Juan de MarconaMarcona
dangerousexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Cold productive rock reef and bays, trophy rockfish; away from the Punta San Juan colony. Coords approx.
Google MapsPunta San JuanMarcona
closedexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Breeding guano point (RNSIIPG), penguin colony — advisory/no, do not disturb. Coords approx.
Google MapsSOLO 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.
Surfacing
Cameras, map and reference — to hand as you come up.
Live cameras, map & reference
Open the seafloor map →What's in season,
Reference
What's in season,
what the law says.
In season now
- murique grouper
- flag cabrilla
- Peruvian gruntReproductive closure in December — don't take it that month. Sale of the catch banned.
- Pacific drumClosure in April — don't take it that month.
- Peruvian morwong
- fine flounder
Law
- ✓Recreational fishing needs no PRODUCE permit, BUT spearfishing requires a DICAPI diver card/registration (Coast Guard), 18+. Spearing on scuba is banned.
- ✓RN Mar Tropical de Grau (Máncora/Tumbes/Piura) = protected area with restrictions; check the sectors before shooting.
- ⛔ 🚫 Seahorse, whale shark and manta ray — take banned. Don't shoot.
- ⛔ 🚫 RN Mar Tropical de Grau (D.S. 003-2024-MINAM), Paracas NR, San Fernando NR and RNSIIPG (guano islands/points) — no-take core zones: no hunting inside the rings.
Rules change. Before heading out, get the DICAPI diver card/registration (Coast Guard) — spearing on scuba is banned; check the sectors of RN Mar Tropical de Grau.
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.
FAQ — spearfishing in Marcona
Where can I spearfish in Marcona?
Marcona has rock entry points such as Bahías de San Juan de Marcona, Punta San Juan and Bahía San Nicolás. Cold, productive rocky bays, trophy rockfish terrain; next door, Punta San Juan holds Peru's largest Humboldt-penguin colony — a buffer zone. Below you'll find each spot (access, shelter and hazards) and today's forecast.
When is the best season in Marcona?
The coldest south; strong upwelling. Best windows in the lulls between S/SE winds.
How cold is the water in Marcona?
The coldest, 13–16 °C — 5–7 mm suit; strongest upwelling.
Is Marcona good for a beginner?
Hard: the coldest water, strong upwelling and S/SE wind (viento-paracas).
Do I need a licence in Marcona?
In Marcona (Peru), recreational apnea spearfishing needs NO licence (SPDA 2021/IMARPE), but the regulation isn't enacted — follow PRODUCE. Breath-hold only, with a buoy; don't sell the catch. Note: RN Mar Tropical de Grau and Paracas NR are no-take (respect the rings). Closures: chita (Dec), lorna (Apr). Seahorse, whale shark and manta = no-take. See the guide.
Coming soon
Get the go / no-go verdict for Marcona by email
Leave your email — and the moment a window opens at Marcona, we'll send the go / no-go verdict. Email is all we need.
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