Today — right on the edge — 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 Vung Tau, 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 mapRocky point, 1–6 m, from shore. Coords approx.
Google MapsIslet reef and rocks, 1–6 m, from shore. Coords approx.
Google MapsRocky point, 1–6 m, from shore. Coords approx.
Google MapsRocky point, 2–8 m, from shore. 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.
Cameras, map and reference — to hand as you come up.
Vietnam has no national speargun ban: spearguns and compressors are not on the banned-gear list (Circular 19/2018 as replaced by Circular 01/2022), but the Fisheries Law 2017 (art. 7) bans all fishing in the strict and restoration zones of marine protected areas. Nha Trang Bay (Hon Mun), Cu Lao Cham, Ly Son, Con Dao and Nui Chua are closed to spearfishing in those zones; never take protected species. Check provincial rules locally.
Vung Tau has rock entry points such as Hon Ba, Nghinh Phong cape and Bai Dua rocks. Vung Tau: Hon Ba, Nghinh Phong and Long Hai. Below you'll find each spot (access, shelter and hazards) and today's forecast.
March–June; June–September the southwest monsoon, November–February strong northeast wind at Mui Ne.
About 26–29 °C; visibility 2–4 m at Vung Tau, up to 10–15 m at Phu Quy and Con Dao.
Moderate: wind and currents at the exposed islands; Con Dao National Park is closed to spearfishing.
Vung Tau: Vietnam has no national speargun ban: spearguns and compressors are not on the banned-gear list (Circular 19/2018 as replaced by Circular 01/2022), but the Fisheries Law 2017 (art. 7) bans all fishing in the strict and restoration zones of marine protected areas. Nha Trang Bay (Hon Mun), Cu Lao Cham, Ly Son, Con Dao and Nui Chua are closed to spearfishing in those zones; never take protected species. Check provincial rules locally.
transparency ~3 m · satellite, yesterdaysatellite estimate · may differ right at the shore
