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 Scharendijke, 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 mapEnter from the jetty (with a lift for disabled divers) or beside the small groynes further east. Oyster beds and sand to about 15 m, near the Brouwersdam sluice. No current; visibility drops with north-east wind. Spearfishing not permitted here — check local rules.
Google MapsEnter at the end of the pier or from the small shell beach; the shallow sand flat west of the spit is also good for snorkelling. Basalt stones, oysters and sand slope to about 30 m. Slippery stones at the pier, little current; keep clear of marina boat traffic and fishing gear. Spearfishing not permitted here — check local rules.
Google MapsEnter from the jetty stairs. Reef balls to the right of the jetty, concrete slabs sloping to about 15 m and an old groyne, with a maximum depth around 30 m. No tidal current in the Grevelingen; very busy site, arrive early. Spearfishing not permitted here — check local rules.
Google MapsEnter from the dike using the rope over slippery stones and swim south-east along the dike to the overgrown pumping-station pillars starting at about 6 m; maximum depth about 25 m. No current; visibility drops when the pumping station discharges. Spearfishing not permitted here — check local rules.
Google MapsSwim on the surface from the Scharendijke jetty to the marker buoys and descend the line to a 57 m concrete barge lying between 19 and 29 m. Visibility is often under 3 m: experienced wreck divers only, with a reel and backup light. Spearfishing not permitted here — check local rules.
Google MapsDike slope (Oosterschelde/Grevelingen), shore entry. Spearfishing not permitted here — check local rules. Coords approx.
Google MapsEnter from the platform at the end of the jetty or the stone stairs; the step is deep and slippery. Reef balls, basalt blocks and sand flats, with two buoyed small wrecks at about 10 m on the west side. No tidal current; watch for fishermen's fyke nets. Spearfishing not permitted here — check local rules.
Google MapsGo down the dike opposite the railway crossing and swim out to the first buoy of the mussel farm before descending. Sandy bottom with mussel ropes and weed beds near the Brouwersdam inlet. Do not enter the farm to the east (prohibited). Spearfishing not permitted here — 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.
Cameras, map and reference — to hand as you come up.
Spearfishing is prohibited in all Dutch sea and coastal waters (Uitvoeringsregeling visserij art. 14 — no harpoon or any fish-wounding gear) and in inland waters (rod only). Forecasts here are for freediving and snorkelling; leave the speargun at home.
Scharendijke has rock entry points such as Den Osse – Nieuwe Kerkweg, Scharendijke (Elleboog) and Den Osse Haven. Grevelingen dive village — a closed saltwater lake without tides, so conditions hinge on wind only. Below you'll find each spot (access, shelter and hazards) and today's forecast.
May–September; the Oosterschelde and Grevelingen are calm and clear in summer, the North Sea side clouds up in wind.
4–6 °C in February, 18–20 °C in August — a drysuit or 7 mm in winter, 5 mm in summer.
Dykes, mussel beds and tidal streams in the Oosterschelde (dive at slack water); Grevelingen is a tideless lake. Spearfishing is banned in all Dutch waters — freediving and snorkelling only.
Scharendijke: Spearfishing is prohibited in all Dutch sea and coastal waters (Uitvoeringsregeling visserij art. 14 — no harpoon or any fish-wounding gear) and in inland waters (rod only). Forecasts here are for freediving and snorkelling; leave the speargun at home.
