- window
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Reef 5–25 m off Bouros beach (ancient marble columns) E of Karystos — open clear water; sargos, dentex, amberjack. Shore/boat.
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 mapReef 5–25 m off Bouros beach (ancient marble columns) E of Karystos — open clear water; sargos, dentex, amberjack. Shore/boat.
Google MapsCement-freighter wreck (1973), 20–30 m, upright on sand off an islet in S Evia near Nea Styra/Petalioi — the classic regional trophy dive; amberjack, grouper. Boat.
Google MapsReef ~15–35 m inside the Cavo D'Oro straits — ⚠️ Kafireas current + swell, experienced only; amberjack on the current. Boat.
Google MapsReef + wreck ~10–30 m on the W side of Mnima cape — western lee. Boat.
Google MapsPetalioi islet chain in the S Euboean gulf NW of Karystos (lee of Cavo D'Oro), deep reef; + shore marks Marmari/Nea Styra (W lee). 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 Karystos is a Kafireas decision before it is a spot decision. The SE tip of Evia can be clear and blue, with dentex and amberjack on current points, but Cavo D'Oro accelerates N/NE wind and builds current and swell. Bouros is the clear-water shore/boat reef, Mnima is a western-lee boat option, and Marmari/Petalioi is the practical escape when the strait is angry.
Think lee first. Current points can be excellent, but Marmari/Petalioi is the safer direction when Kafireas is working.
| Spot | Type | Depth | Level | Access | Notes |
|---|---|---|---|---|---|
| Bouros Reef | Open clear-water reef | 5-25 m | Intermediate | Shore or boat | East of Karystos, with sargos, dentex and amberjack noted near ancient marble columns. |
| Mnima Reef & Wreck | Reef and wreck | About 10-30 m | Intermediate | Boat | W side of Mnima cape, a more sheltered boat plan than the open straits. |
| Petalioi / Marmari | Islet chain, deep reef and shore marks | Deep reef plus shore marks | Intermediate to advanced | Boat or shore | NW of Karystos in the S Euboean gulf, the lee of Cavo D'Oro, with Natura 2000 advisory checks. |
Kafireas funnels N/NE wind, so check the Marmari ferry-port camera and the actual sea before committing. Best legal timing is Jun and Sep-Oct; May is closed by law, and Jul-Aug often blows out. Greek legal baseline: May is totally banned (ΠΔ 373/1985); no licence since 2014; freediving-only; 5 kg/day. Linari and Petalioi sit in Natura 2000 advisory marine zones, so check local rules.
No. Greece has required no recreational fishing licence since 2014, but check the state sign-up.
Yes. The national May spearfishing ban applies to Karystos under ΠΔ 373/1985.
Kafireas and Cavo D'Oro funnel N/NE wind, creating wind-driven current and large swell.
West toward Marmari and Petalioi, or only in narrow calm windows near the current points.
No. Linari sits in the Cavo D'Oro straits with current and swell, so it is experienced-only.
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