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 Anzio, 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.
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 mapOff the ruins of Nero's villa, on the west face of Capo d'Anzio, 100 m out: tuff shelves and Roman rubble fallen into the water, 5-9 m. Entry from the rocks below the belvedere. Sea bream, bass and octopus among the ancient blocks. Unworkable in a libeccio, and the water dirties at once.
Google MapsOn the seafront between Anzio and Nettuno, 80 m outside the Marinaretti breakwaters: artificial boulders on sand, 3-6 m, shallow but full of holes. Shore entry. It is not natural rock — the real ledge ends with the cape — but it is where the octopus and the sea bream are when the cape is in swell. Packed beach in summer: get in well away from the swimmers.
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.
Anzio has rock entry points such as Grotte di Nerone and Marinaretti. Spearfishing in Anzio: sea forecast and shore-entry spots. Below you'll find each spot (access, shelter and hazards) and today's forecast.
Mostly summer for the headland rock (Circeo, Gaeta) and for Ponza; the sandy north only opens in the calms. The SW libeccio dominates — look for the small-sea day and the sheltered side of the cape.
Warm for the Tyrrhenian: ~14–26 °C. A 3 mm suit in summer, 5 mm in the shoulder months. On the headlands (Circeo, Gaeta) and at Ponza the water clears fast after a blow.
Intermediate: on the headlands (Circeo, Gaeta) and at Ponza there's good rock, but the north is sandy and visibility is the real limit. Pick the cape with the sheltered side and a small-sea day. Buoy always.
No — in Anzio there is no paid licence; a free MASAF declaration is mandatory (the recreational sea-fishing communication, online via SIAN/SPID, renewed each year), which is not a «licence». Breath-hold only (no scuba), with a marker buoy and no selling the catch. See the guide.
SpainRules change. Before heading out, check with MASAF (registration) and the Guardia Costiera / Capitaneria di Porto; Sicily and Sardegna add regional tightening.
Portugal
