Dive today — wave, wind and visibility.
Sources & confidence
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.
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.
Safety gates
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
Wind, wave and the swell windows — when to go and the best hours.
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.
Leave your email — and the moment a window opens at Pulau Kapas (Marang), we'll send the go / no-go verdict. Email is all we need.
What's missing? Tell us what you'd like to see — new spots, species, data or features. We read everything.
Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.
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: 3016 spots across 406 stretches of coast — mainland Portugal, Madeira and the Azores.
See all spotsRelief and bottom type, tides, and the depths of each spot.
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.
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 mapShore of a named islet/cape/beach, near shore. No hunting — Pulau Kapas Marine Park; freediving/visibility point. Point placed on the shore of a gazetteer feature; not a confirmed dive or hunting site — unverified.
Google MapsShore of a named islet/cape/beach, depth 5–18 m, near shore. No hunting — Pulau Kapas Marine Park; freediving/visibility point. Depth from published dive and snorkel site guides; point on the shore, 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.
Cameras, map and reference — to hand as you come up.
In any Malaysian marine park no speargun or spearfishing equipment may be carried, used or possessed (Fisheries Act 1985, s.44); Sabah Parks prohibit spearfishing in their parks. Outside parks no national ban was found — check state rules.
Pulau Kapas (Marang) has rock entry points such as Pulau Kapas and Pulau Gemia. Small island 6 km off Marang, protected with neighbouring Gemia as the Pulau Kapas Marine Park — no fishing, no spearguns (Fisheries Act 1985 ss. Below you'll find each spot (access, shelter and hazards) and today's forecast.
March–October; November–February the north-east monsoon closes the east-coast islands.
28–30 °C all year — a rashguard or 1.5–3 mm.
Coral islands — Perhentian, Redang, Tioman, Tenggol — almost all marine parks. In Malaysian marine parks a speargun may not even be carried.
Pulau Kapas (Marang): In any Malaysian marine park no speargun or spearfishing equipment may be carried, used or possessed (Fisheries Act 1985, s.44); Sabah Parks prohibit spearfishing in their parks. Outside parks no national ban was found — check state rules.
transparency ~14 m · satellite, yesterdaysatellite estimate · may differ right at the shore
