Marine weather
Piraeus, the islands and the whole Aegean · hour by hour
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Should I go out?
The Aegean now
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Wind
Waves
The week ahead
Model forecast (Open-Meteo, MET Norway) — do not use for navigation. Official: HNMS (EMY) · Hellenic Coast Guard · navigational warnings.
NOW AND TODAY
The sea at Piraeus now
Good at Piraeus (next 3 hours): Small boat — fine. SUP and kayak — fine. Swimming — with care. Shore fishing — fine. Wind 1 Bft (3 kn N), gusts 5 kn, waves 0.0 m
- Wind
- 3 kn · 5 km/h from N · 1 Beaufort
- Gusts
- 5 kn
- Waves
- 0.0 m · period 3 s
- Air
- 18 °C
- Sea water
- 22.6 °C
Best hours: today 10:00–18:00, tomorrow 08:00–18:00, tomorrow 08:00–11:00.
Tomorrow: Good: wind up to 10 kn from SSE (3 Beaufort), gusts up to 16 kn, waves up to 0.6 m, air 21…23 °C. Suitable daylight hours: 10 of 10.
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NOW
Selected spot
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- Wind (direction from)
- Waves (direction from)
Forecast for heading out to sea
Evening reminder
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MAP
Click on the sea for a forecast
The point is rounded to a 0.05° grid (~5 km). Waves come from the nearest sea cell of the model.
7 DAYS
The week ahead
Daily rating = the worst daylight hour (same scale as the hourly forecast).
SEA
Sea state
ATMOSPHERE
Air
SUN AND MOON
Daylight
BEACH
Swimming
Swim only on lifeguarded beaches and follow the lifeguards' flags. With waves above 1 m there is a risk of rip currents.
SCALES
Beaufort and Douglas — what the numbers mean
Wind · Beaufort
Sea · Douglas
DATA SOURCES AND LICENCES
Where the data comes from
- Weather and sea (wind, gusts, temperature, rain, cloud, waves, swell, water temperature, currents): Open-Meteo forecast and marine APIs (models from national weather services, ECMWF and Copernicus Marine), licence CC BY 4.0. Changes: point and hour selection, unit conversion (knots, km/h, Beaufort), daily summaries.
- Backup weather source: MET Norway Locationforecast 2.0, CC BY 4.0 — used only if Open-Meteo is unavailable.
- Sun and moon: calculated in the browser with astronomical formulas — no external service.
- Map: © OpenStreetMap contributors (ODbL); Leaflet (BSD-2).
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Aegean Radar is not affiliated with Open-Meteo, MET Norway, Copernicus, the Hellenic National Meteorological Service (HNMS/EMY) or the Hellenic Coast Guard, and they do not endorse this site. Forecasts come from models and can differ from real conditions, especially close to the coast.
More about the forecast
Separate pages with current conditions and local information: marine weather Piraeus, marine weather Mykonos, marine weather Santorini, marine weather Naxos, marine weather Paros, marine weather Rhodes, marine weather Kos, marine weather Chios, marine weather Mytilene, marine weather Thessaloniki, marine weather Kavala, marine weather Volos, marine weather Heraklion.
Wave and wind forecast for the Aegean Sea — Piraeus and the Saronic Gulf, the Cyclades, the Dodecanese, Crete, the north-east Aegean islands, Thessaloniki, Kavala and Volos: wind direction, speed and gusts, wave height and period, swell and sea water temperature for the next 48 hours and 7 days. The meltemi, the strong summer north wind of the Aegean, is shown in the same scale. Useful before fishing, sailing or a boat trip; live ships are on the AIS map.