Ilhas Tijucas (ao largo)Niterói
borderlineexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
Niterói spearfishing forecast — wind, swell, visibility, tides & live cameras
5.3
wave 0.8 m
visibility4m
Today — right on the edge — wave, wind and visibility.
Sources: IPMA · NDBC · Copernicus — high confidence · data 14:02
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 14:02
Niterói — solo, off the rocks
caution — solo off the rocks is risky, check on site · long secondary swell (11 s)
wave 0.8 mwind 10, gusts 30 km/hvisibility ~6 mwindow 12:00–15:00
today, best window 12:00–15:00
fish · Visibility 6 m · Water 23.2°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
06:30–17:26 · first quarter
▼ 02:00▲ 07:00▼ 15:00▲ 19:00 · 0.3 m
Hours (06→20)
12
15
18
Day's trends
Tide0.03 m
Wave0.76 m
Wind10 km/h
Water23 °C
fish activity: moonset 00:37 · moderate · moon underfoot 06:10 · high · moonrise 11:50 · moderate · moon overhead 18:40 · high
Conditions window12:00–15:00
caution — solo off the rocks is risky, check on site fish
Hs 0.78 mperiod 5.5 swind 10→30surge 1.1viz 4 m
0.78 mup to ~1.56 · 104° at an angle
5.5 sswell moderate
10→30gusts 30 km/h
1.1weak surge
0.11m/s
4 mrecent swell
23.2°C5 mm + hood
▼15:00tide turn near
Atmosphere48 kmlandmarks visible
moderatemoonrise
- long secondary swell (11 s)
- strong wind 10 km/h, gusts 30 — caution
- ebb — weaker inshore
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
Praia de Itaipu costãoNiterói
borderlineexposed head-on to the swell today
- window
- tide
- shelter
- hazard
- access
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.
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
- fat snookState closed seasons: BA 15 May–31 Jul; ES 1 May–30 Jun; PR 1 Nov–31 Dec; SP — none.
- common snookState closed seasons: BA 15 May–31 Jul; ES 1 May–30 Jun; PR 1 Nov–31 Dec; SP — none.
- dusky grouper⚠️ Closed season 1 Nov–28 Feb (national). Size 47–73 cm. Vulnerable — go easy.
- gag grouper
- black grouper
- comb grouper
- snowy grouper⚠️ Closed 1 Sep–31 Oct (SE/S). Deepwater grouper.
- bluefish
- whitemouth croaker
- black drum
- lebranche mulletManaged by annual quotas/seasons. Min 35 cm; estuary bars may be restricted in season.
- king mackerel
- serra Spanish mackerel
- mahi-mahi
- greater amberjack
- crevalle jack
- silver porgy
- lionfishInvasive, spreading in NE Brazil. Culling encouraged. Venomous spines — careful; flesh edible.
- Atlantic goliath grouper🚫 Full moratorium since 2002, indefinite (CR, Portaria MMA 148/2022). Do not take, release it. Fine R$700–100,000 + gear seizure.
Law
- ✓A is required (category B – boat covers apnea spearfishing), issued on gov.br by the . Exempt: under-18 accompanied, men 65+/women 60+.
- ✓Apnea only: spearing on a tank/scuba is banned (artificial breathing apparatus prohibited — IBAMA rule).
- ✓Goliath grouper (mero, Epinephelus itajara): total moratorium since 2002, renewed (in force 2026+). Never a legal target — capture/transport/sale is an environmental offence.
- ✓Closed seasons (vary by state): true grouper & badejo in the N/NE 1 Aug–30 Sep; bluefish in the S/SE ~1 Dec–31 Mar; robalo reopens after 31 Jul (state-dependent). Mind minimum sizes.
- ⛔ 🚫 Goliath grouper (Epinephelus itajara) — indefinite moratorium (CR). Not a legal target: do not take, release.
- ⛔ Hammerhead sharks (Sphyrna lewini/zygaena) and angel sharks (Squatina spp.) — red list, take banned. Don't shoot.
- ⛔ Sea turtles, whales/dolphins, seahorses — protected, taking/disturbing prohibited.
Rules change and vary by state. Before heading out, check on gov.br (recreational licence, MPA) and the state closed seasons/sizes; apnea only, goliath grouper is banned.
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 Niterói: spots, seasons and rules
Spearfishing in Niterói belongs on the ocean side. Itaipu, Itacoatiara and Piratininga give seaward headlands, while the Tijucas Islands are an offshore boat option in settled weather. Guanabara Bay is not the plan because of pollution and poor hunting logic. The local band is 18 to 25 °C water and 6 to 15 m visibility. MERO TOTAL MORATORIUM still applies: goliath grouper is banned. Use the gov.br recreational licence, waived only for under-18s with an adult and for men 65+/women 60+, and keep spearfishing apnea-only.
TL;DR
- Niterói is an ocean-side plan: Itaipu, Itacoatiara, Piratininga and offshore Tijucas, not Guanabara Bay.
- Local water is 18 to 25 °C with 6 to 15 m visibility on ocean beaches and outer islands.
- South swell and boat traffic are the two big filters before the fish list matters.
Best spearfishing spots in Niterói
Split the city clearly: bay side out, ocean side only when the sea is small. If south swell is pushing foam over the rocks, call it off.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| Praia de Itaipu headland | Ocean shore headland | Shallow to moderate, no tighter local number | Intermediate | Shore entry with exit checked first | A practical shore reference, but stay away from swimmers and do not force a rough rock exit. |
| Tijucas Islands offshore | Outer islands and reef | Moderate, no specific local band | Intermediate to advanced | Boat and surface support | Clearer water is possible offshore, but boat cover, float, current and return logistics have to be easy. |
What conditions matter in Niterói?
South swell is the classic stop signal because it dirties water and makes rock exits hard. In smaller windows, the ocean beaches can reach the stated 6 to 15 m visibility range. There is no local camera in the notes, so direct observation matters. Nationally, the gov.br licence is required, scuba spearing is banned, and goliath grouper remains under total moratorium. If an environmental boundary is uncertain, treat it as closed.
FAQ
Do you need a licence in Niterói?
Yes. Use the gov.br recreational fishing licence service. Exemptions cover accompanied under-18s and men 65+/women 60+.
Can you hunt in Guanabara Bay?
No. The local guidance keeps hunting on ocean beaches and offshore islands, not the polluted bay side.
What visibility is typical?
The stated range is 6 to 15 m on ocean-facing water.
Are the Tijucas Islands shore entries?
No. Treat them as offshore boat dives with surface support.
Can you spear goliath grouper?
No. Goliath grouper, or mero, is under total moratorium.
Sources
Nearby towns
Coming soon
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