Today — right on the edge — wave, wind and noticeable surge.
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
Leave your email — and the moment a window opens at Nishiizu, 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.
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.
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 mapSea-cave coast at Dogashima (Tensodo cave), dived as part of the Ukishima/Dogashima area. No depth confirmed. Spearing not permitted in Shizuoka — check local rules.
Google MapsGentle concrete slope into a calm cove below Koganezaki park; boulders and white sand from about 1 m down to 18 m, little current year-round. Spearing not permitted in Shizuoka — check local rules.
Cameras, map and reference — to hand as you come up.
Japan: spearguns and scuba/hookah are banned for all recreational fishers nationwide (Fisheries Agency prefectural gear table); a hand spear (yasu) is allowed only in some prefectures (e.g. Okinawa, Kagoshima, Nagasaki, Kochi, Mie); abalone, lobster, octopus and sea urchin in fishery-right areas belong to the local co-op, and marine park zones are closed. Check current rules locally.
Kumomi is mostly boat diving: Ushitsuki-iwa, two minutes from port, has tunnels, arches and caves to about 24–26 m with white sand outside. The single beach point is Hariishi (see separate spot). Spearing not permitted in Shizuoka — check local rules.
Google MapsKumomi's only beach point: shallow, quiet sandy cove with easy entry, average about 5 m and maximum 8 m, no current. Spearing not permitted in Shizuoka — check local rules.
Google MapsTago is a boat-diving area: inner-bay reefs (Bentenjima, Shirasaki) a few minutes out reach 35–40 m, with branching coral at Shirasaki. Each dive returns to port. Spearing not permitted in Shizuoka — check local rules.
Google MapsFutone, a submerged pinnacle about 10 minutes by boat, rising from around 40 m to 8 m with soft corals and dense schools. Current is often strong — intermediate to advanced. Spearing not permitted in Shizuoka — check local rules.
Google MapsSmall enclosed bay at Torisaki, Toi — the area's only beach entry; shallow sloping sand and rock to a maximum of about 25 m, calm year-round, with a wreck reachable from the beach. Spearing not permitted in Shizuoka — check local rules.
Google MapsSheltered cove in front of the dive centre; old submarine-volcano rock with arches and tunnels, sand with guide ropes, average about 6 m and maximum 12–13 m, little current. Spearing not permitted in Shizuoka — check local rules.
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.
Nishiizu has rock entry points such as Tago, Tago south and Dogashima. West Izu's cliff coast facing Suruga Bay and Fuji — Dogashima's sea caves, Tago's deep rock and Kumomi's pinnacles, with glassy water under winter's NE wind. Below you'll find each spot (access, shelter and hazards) and today's forecast.
June–November; the Kuroshio keeps the water warm into late autumn, winter brings the north-west monsoon, and typhoons come August–October.
14–17 °C in February–March, 26–28 °C in August — 5–7 mm in winter, 3 mm in summer.
Rocky capes and reefs, Pacific swell and currents off the points. Spearguns and scuba are banned nationwide — only a hand spear (yasu), where the prefecture allows it; shellfish, lobster, octopus and urchin in fishery-right areas belong to the co-op.
Nishiizu: Japan: spearguns and scuba/hookah are banned for all recreational fishers nationwide (Fisheries Agency prefectural gear table); a hand spear (yasu) is allowed only in some prefectures (e.g. Okinawa, Kagoshima, Nagasaki, Kochi, Mie); abalone, lobster, octopus and sea urchin in fishery-right areas belong to the local co-op, and marine park zones are closed. Check current rules locally.
