Ilha Comprida (Cabo Frio)Cabo Frio
borderlineexposed head-on to the swell today
- window
- —
Fine sand strip with rocks, small caves and corals, 8–18 m, by boat; rays, morays and small sharks.
Google MapsCabo Frio spearfishing forecast — wind, swell, visibility, tides & live cameras
5.2
wave 1 m head-on
visibility2m
Today — right on the edge — wave, wind and visibility.
Sources: INMET · buoys · Open-Meteo · Copernicus — high confidence · data 00:15
Sources & confidence
- Sources
- INMET · buoys · Open-Meteo · Copernicus
- Method
- spearo sea-state engine: consensus of up to 6 models + 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
Surface
Wind, wave and the swell windows — when to go and the best hours.
spearo.app
INMET no dataupdated 00:15
Cabo Frio — solo, off the rocks
caution — solo off the rocks is risky, check on site · wind 14 km/h, gusts to 31 — caution
wave 1 m head-onwind 14, gusts 31 km/hvisibility ~2 mwindow 09:00–18:00
today, best window 09:00–12:00
fish · Visibility 2 m · Water 24.9°C
confidence low · 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.
Sunday · today2026-10-25
05:07–17:56 · full moon
▲ 01:00▼ 08:00▲ 14:00▼ 20:00mid-range tides · 1.2 m
Hours (06→20)
06
09
12
15
18
Day's trends
Tide0.22 m
Wave1.00 m
Wind8 km/h
Water25 °C
fish activity: moonset 04:22 · moderate · moon underfoot 11:00 · high · moonrise 17:36 · moderate · moon overhead 23:20 · high
Conditions window06:00–09:00
don't go fish
Hs 1.04 m · roughperiod 6 swind 15→23surge 1.9viz 2 m
1.04 mrough · up to ~2.08 · 120° at an angle
6 sswell moderate
15→23gusts 23 km/h
1.9noticeable surge
0.58m/s
2 mrecent swell
24.7°C5 mm + hood
▼08:00tide turn near
Atmosphere32 kmovercast
lowoff the lunar peaks
- long secondary swell (10 s)
- wind 15 km/h
- low water — slack
confidence lowtwilight
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