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.
How we score the water
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.
01
Swell & wave memory
Height, period and direction of the swell, plus the wake of recent storms — an old storm still stirs the water, and the engine remembers.
02
Wind & gusts
Speed and gusts, hour by hour — wind speed and an onshore push chop the surface and cut visibility.
03
Tide phase
Timing and range of the tide, calibrated per coast — big spring tides pull the verdict toward caution.
04
Water temperature
Sea-surface temperature — sharply cold water vetoes a green verdict.
05
Currents & outflow
Direction and drift of the current — it pushes you, and it drags turbid coastal water across where you dive.
06
Rain runoff & air clarity
Rain muddies the water inshore through land runoff, while fog and haze cut visibility at the surface.
07
Coast shape & exposure
How the coast faces the swell — a sheltered cove keeps the water clean; an exposed, head-on point takes a penalty.
Safety gates
Thunderstorm forecast — an instant red, no exceptions.
An official warning (MeteoAlarm / IPMA) — yellow, or red for the higher ranks.
Missing input data — a would-be green is capped to yellow rather than overstated.
Strong disagreement between forecast models — a green day is pulled back to yellow.
Night hours — where night spearfishing is banned by law the window is forced red; where it is legal (Australia outside NSW, New Zealand, South Africa) it is capped at yellow, never green.
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
Entry points with coordinates
Seabed relief — promising ground
This verdict — in your pocket. Open the app for the week's window.
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−10 m
The water column
Visibility and what drives it — post-storm clearing, river plume, temperature and the thermocline.
What it is
A marine instrument, go / no-go for solo hunting.
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.
Epinephelus marginatus · 8–40 m · ⛔ closed 1 Jul–31 Aug
Kirnja (grouper): spearfishing for grouper is closed 1 Jul–31 Aug. A vulnerable, slow-growing fish — please release it. National daily limit 5 kg.
European seabass
Dicentrarchus labrax · 0–15 m
white seabream
Diplodus sargus · 0–12 m
striped seabream
Lithognathus mormyrus · 2–20 m
Law
✓Speargun fishing is allowed ONLY with the SPORT sea-fishing licence (dozvola za športski ribolov na moru) — the ordinary does NOT cover it; tourists are eligible. 2026 fees: 1-day €10 / 3-day €25 / 7-day €45 / annual €79.63, plus mandatory HSSRM membership €10. Buy the day/multi-day online at ribarstvo.mps.hr; the annual is issued via HSSRM/clubs.
✓Breath-hold only, from age 16, and daylight only — from sunset to sunrise speargun fishing is prohibited; in the water you must be marked at the surface (ZOMR NN 62/17, čl. 31.).
✓Kirnje (Epinephelus spp., Polyprion americanus, Mycteroperca rubra): closed 1 Jul–31 Aug (Pravilnik NN 64/2023, čl. 5.); outside that season, at most 1 specimen for the whole group (Pravilnik NN 48/2026, čl. 11.). The general daily bag is 5 kg per fisher (ZOMR NN 62/17, čl. 33.). A vulnerable, slow-growing fish — release when in doubt.
✓Marking in the water: an orange or red buoy at least 30 cm across at the centre of the dive area — or a diver's flag (ZOMR NN 62/17, čl. 31., which sends you to Pravilnik NN 47/99, čl. 4.). There is NO national «10-litre buoy» rule: it lives inside PP Lastovsko otočje (NN 154/2009, čl. 34.) — and that is where, and only where, the two-speargun limit applies too.
✓Sport and recreational catch may not be placed on the market — selling it is prohibited (Pravilnik NN 48/2026, čl. 8.).
✓Towing the fisher behind a vessel and using an underwater scooter are both prohibited while spearfishing (Pravilnik NN 48/2026, čl. 9.).
✓Per-piece caps on top of the five kilos: octopus — 2, Eunice roussaei — 2, all Elasmobranchii (sharks and rays) — 0. Kept fish of the 23 listed species must be marked immediately by cutting off the lower lobe of the caudal fin, and cephalopods by a deep incision between the eyes (Pravilnik NN 48/2026, čl. 11.). The five-kilo day itself is set by the act (ZOMR NN 62/17, čl. 33.).
✓Aquaculture: no fishing of any kind on a farm or within 300 m of the mark showing its position (50 m for shellfish-growing areas), or of the concession boundary (ZOMR NN 62/17, čl. 14., in the NN 14/2024 redaction).
✓Inside a national park, a special marine reserve or a nature park you need a SEPARATE permit from the managing public institution on top of the state licence; the nature-protection ministry may also close fishing there outright (Pravilnik NN 48/2026, čl. 13.). In waters under a special management regime the limits of the acts that establish that regime apply (Pravilnik NN 125/2020, čl. 2.).
✓One national minimum-size table: dentex 30 cm, brown meagre 30 cm, scorpionfish 25 cm, white seabream 23 cm, gilthead 20 cm, amberjack 35 cm, dorado 35 cm, octopus 1 kg (Pravilnik NN 64/2023, čl. 3.). Dorado (Coryphaena hippurus) is closed to sport and recreational fishing from 1 January to 14 August (NN 134/2024, čl. 2.). Bluefin and albacore tuna, swordfish, eel, large crustaceans, corals and sponges — do not take them at all (ZOMR NN 62/17, čl. 32., in the NN 14/2024 redaction).
⛔ Fan mussel (Pinna nobilis) — strictly protected, taking/disturbing prohibited (mass die-off from a pathogen).
⛔ Date mussel (Lithophaga lithophaga) — harvesting strictly banned (destroys the reef).
⛔ Seahorses (Hippocampus), loggerhead turtle (Caretta caretta) and monk seal (Monachus monachus) — protected, taking/disturbing prohibited.
Rules change and fees/seasons are updated yearly. Before heading out, check the Ministry of Agriculture fisheries portal (ribarstvo.mps.hr) and get the SPORT licence (the annual via HSSRM/a club); a speargun without it is illegal.
Safety protocol
Sets: watch the wave trains ≥15 min before entering; Hmax ≈ 2×Hs, the wash can run 50 m past the foam line. A lull >10 min with period >12 s = a big set «overdue», do NOT enter; enter right after a full set passes and re-check at minute 30.
Exit FIRST: find your exit AND a backup before entering. On a rocky/boulder shore a 0.5 m rise in swell can make the exit impossible — getting pinned/unable to climb out is the main killer.
Headland rip: prominent points often have a permanent topographic rip regardless of the model — locate it, enter/exit on the windward side, never swim against it.
Cold: wetsuit per the SST chip; the first shiver = a metabolic surge and a drop in breath-hold → get out at the first steady shiver. Cap the session at 45–60 min below 15 °C.
Solo discipline: buoy up; tell someone the spot and exit time; conservative breath-hold (never push it in cold/murky/surfy water); visibility <3 m — don't enter.
Afternoon wind: on many coasts the wind builds from midday — plan to be out of the water by midday; the chop builds — get out.
UV 11:00–15:00 (UVI ≥6): sunscreen and cover up on the surface interval.
Solo is a fundamental risk (hypoxic blackout with no buddy). Any doubt = No-go.
FAQ — spearfishing in Lastovo
Where can I spearfish in Lastovo?
Lastovo — gateway to a no-take park, clearest water in Croatia. Check today's forecast above and pick a calm-sea day, always with a marker buoy.
When is the best season in Lastovo?
April to November. South Dalmatia (Dubrovnik, Mljet, the Elaphiti) holds the warmest, clearest Croatian water and a slightly longer season.
How cold is the water in Lastovo?
The warmest Croatian water (to 26–27 °C) and very clear, microtidal. Jugo brings the swell here; mornings after it are the best.
Is Lastovo good for a beginner?
Sheltered island coasts and easy entries — but mind the Mljet national park and the Malostonski Bay no-take zones (shellfish farms).
Do I need a licence in Lastovo?
Yes — in Lastovo, as everywhere on the mainland, you need a recreational fishing licence (DGRM); breath-hold only (no scuba), with a marker buoy and no night diving. See the guide for the details.
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