- window
- tide
- shelter
- hazard
- access
Rocky cape + drop-off + a submerged ancient marble quarry (SE) — lee of the north, open E/SE. ⚠️ Submerged antiquity — look, don't touch/raise (L.3028/2002). Shore.
Google MapsToday — right on the edge — wave, wind and visibility.
Sources & confidence
Compiled by the spearo sea-state engine
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.
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: 1152 spots across 189 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 cape + drop-off + a submerged ancient marble quarry (SE) — lee of the north, open E/SE. ⚠️ Submerged antiquity — look, don't touch/raise (L.3028/2002). Shore.
Google MapsN-coast rock/reef — clear when calm but windward to the meltemi; fish it only on a N-light/dawn day, else flip to the S coast. Shore/boat.
Google MapsWalls + a vertical wall to 24 m + an old wooden wreck, S coast ~4 mi off Potos — sheltered, rich wall life. Boat.
Google MapsRocky, rich shallow reef (SW, next to Potos) — easy SW-sheltered shore entry; bream, octopus, small grouper. Shore.
Google MapsSubmerged rocks 25–60 m off Potos/Astris (S coast) — the island's headline structure; moray, tuna, grouper & amberjack; S-facing = meltemi-sheltered. Boat/shore.
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.
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».
National minimum sizes + a 150 g floor (in the table below); grouper 1/day. Spearfishing is closed all May (ΠΔ 373/1985).
Rules change, and the local Λιμεναρχείο (port authority) may impose local restrictions. Before heading out, check the current rules and the declared archaeological zones (ENALIA).
Spearfishing in Thasos is about turning to the right side. The north and east have rock and clear water, but Limenas is windward in N/NE meltemi. The south and southwest lane around Potos, Pefkari and Astris is the practical shelter. May is a total spearfishing ban in Greece, no spearfishing licence has been issued since 2014, and legal hunting is freediving-only with a 5 kg per person daily limit.
Use the south and southwest in meltemi. Natura advisory context around parts of Thasos requires local boundary checks, but is not described here as an automatic ban.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| San Antonio Rocks | Submerged rocks off Potos/Astris | 25-60 m | Deep and demanding | Boat or shore | The headline structure on the sheltered south side, with grouper and amberjack rock. |
| Pefkari | Shallow rocky reef near Potos | Shallow | Easier SW shore entry | Shore | A practical shore option with sargos, octopus and small grouper. |
| Aliki peninsula | Rocky cape and ancient marble quarry | Qualitative coastal drop | Wind-direction dependent | Shore | Lee of north wind but open E/SE. Look at the antiquity, do not touch or raise anything. |
| Limenas Cape | North-coast rock and reef | Qualitative shallow to moderate | Calm north only | Shore or boat | Clear when calm, but windward in meltemi. Turn south if it is blowing. |
The useful local season is June to October. May is fully closed to spearfishing nationwide. In N/NE meltemi, work Potos, Pefkari and Astris rather than Limenas; use Aliki only when E/SE exposure is not an issue. Greek rules require freediving only, no scuba or compressed air, and a 5 kg per person daily catch limit. No spearfishing licence has been issued since 2014, but check gov.gr for registry status before travel.
The south and southwest lane around Potos, Pefkari and Astris is the practical shelter.
No. It includes submerged antiquity. Look only, and do not touch, move or raise anything.
Yes. May is a total spearfishing ban across Greece (ΠΔ 373/1985), including Thasos.
No spearfishing licence has been issued since 2014. Check gov.gr for current registry requirements.
The local profile includes grouper, sargos, dentex, amberjack, octopus, seabream and seabass.
Leave your email — and the moment a window opens at Thasos, we'll send the go / no-go verdict. Email is all we need.
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transparency ~21 m · satellite, 2 days agosatellite estimate · may differ right at the shore