Today — sit it out — wave, wind and surge pounding. 💧 Water should clear by Thursday (~1d)
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 Waianae, we'll send the go / no-go verdict. Email is all we need.
Every covered town has its own live forecast, cameras and entry points. Choose where you're diving.
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: 1391 spots across 205 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 mapThe warm power-plant outflow concentrates fish over the reef, 3–12 m: reef fish and papio. A very busy site with divers and dive schools — mark yourself clearly and share the space politely.
Google MapsThe full spot briefing is part of the subscription: entry, bottom, hazards, tide window.
Open in the appCameras, map and reference — to hand as you come up.
Check the cam BEFORE you leave. Foam, brown/green murk, or waves washing the entry rocks = No-go. At night/in fog the cam is useless — treat it as «unknown», NOT «green».
Spainbuoy Waimea Bay, HI: 26.6° · wave 1.5 m/10 s · 42 min ago
Caverns and arches off Makaha, 5–18 m, in clear leeward water: ulua, uku and kumu in the crevices. It is O'ahu's most transparent coast in summer. No recreational marine licence is required in Hawai'i.
Google MapsThe full spot briefing is part of the subscription: entry, bottom, hazards, tide window.
Open in the appA secluded northwest tip with sand and reef in clear water, 3–15 m: ulua and papio. Exposed to northwest swell and unguarded for much of the year — go with a buddy and only on flat days.
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.
US spearfishing law is state-by-state. License, spearable species, powerhead rules and distances vary; federal sanctuaries (Gray's Reef, the Keys, Flower Garden Banks) ban spearfishing. Always confirm with the state agency and local ordinances.
Waianae has rock entry points such as Makaha Caverns / Reef, Kahe Point (Electric Beach) and Yokohama Bay (Keawa'ula). The clearest leeward Oahu water — Makaha caverns and NW-tip reefs for ulua, uku and kumu. Below you'll find each spot (access, shelter and hazards) and today's forecast.
Year-round; ulua/uhu, removing invasive roi/ta'ape is encouraged. No licence for residents.
Warm, 24–27 °C; gin-clear year-round, reef channels on the slack.
Beginner-friendly: warm clear water; respect MLCD/no-take and the West Hawai'i scuba-spear ban.
Yes — in Waianae almost certainly, but the licence is the STATE's, not a federal one: nearly every coastal state requires its own saltwater fishing licence, and several add a free registration or an extra endorsement on top (Florida's free State Reef Fish Survey for reef fish, Texas's saltwater endorsement, California's Ocean Enhancement Validation). Hawaii asks nothing of residents and charges visitors the NRMFL. What may be speared, and with what gear, is state law too — the price and the details depend on the state, so read the «Law» block below.
Portugal
