CRETE · LIVE MODEL

Marine weather in Heraklion: wind, waves and sea temperature

Wind in knots and Beaufort, gusts, waves and water temperature at Heraklion for the next 48 hours, with a simple answer: is it a good time to go out?

NOW AND TODAY

The sea at Heraklion right now

Current values for Heraklion are loading. The interactive forecast below shows wind, waves and water temperature by the hour.

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NOW

Selected spot

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Wind (direction from)
Waves (direction from)

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Waves———

Air——

Sea water—surface

Gusts—estimate

Precipitation——

ANGLER / SMALL BOAT

Should I go out?

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BEST HOURS · 48 H (DAYLIGHT)

How is the rating calculated?

	Wind	Gusts	Waves
Go	≤ 7 m/s (≈ 14 kn) up to 4 Beaufort	≤ 10 m/s (≈ 19 kn)	≤ 0,6 m
Caution	≤ 10 m/s (≈ 19 kn) 5 Beaufort	≤ 13 m/s (≈ 25 kn)	≤ 1,0 m
Not recommended	> 10 m/s 6+ Beaufort	> 13 m/s	> 1,0 m

Thresholds for a small boat (under 5 m, engine, experienced) — the same as in “⛵ My boat”; with a profile they adapt to you. The rating takes the worst of the next 3 hours. Outside daylight, thunderstorms or gusts above the limit → “Not recommended”; fog or missing wave data → at most “Caution”.

This is guidance, not an official warning. Before going out, check the HNMS (EMY) marine forecast, MeteoAlarm (Greece), the official warnings and any orders of the Hellenic Coast Guard. In an emergency: 112 or 108 (Coast Guard).

Forecast for heading out to sea

Place

Tomorrow…Loading forecast… …

Model forecast (Open-Meteo, MET Norway), not an official warning.

HOURLY · 48 H

Slide through time

Selected hour: —

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.

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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.

CRETE

The sea at Heraklion: what to know

The forecast on this page is for a sea point off Heraklion (35.36° N, 25.14° E), in the Crete. Values come from the Open-Meteo forecast and marine models (MET Norway as backup) and are updated several times a day.

More about the sea at Heraklion: wind, traffic, how to read the numbers

Heraklion is on the north coast of Crete, open to the Aegean. The meltemi and other northerly winds bring waves straight onto the coast; southerly winds blow from the mountains and can be very gusty.

The port of Heraklion serves overnight ferries from Piraeus, fast ferries to the Cyclades and cruise ships.

How to read the numbers: wind up to about 10 knots and waves under 0.5 m are usually comfortable for a small boat or SUP near the coast. Waves from 1 m and gusts above 22 knots are already serious for boats under 6 m. The rating follows the boat profile you choose.

Questions and answers

How big are the waves at Heraklion today?

The current significant wave height in metres and its period are in the “Now” block at the top, and hour by hour in the 48-hour chart. Values come from the Open-Meteo marine model.

What is the sea temperature at Heraklion?

We show the model sea-surface temperature at a point offshore. Close to the beach the water can differ by 1–2 °C, especially after a strong wind.

When is it dangerous to go out by boat at Heraklion?

With the default small-boat profile, gusts above 22 knots or waves above 1 m give “Not recommended”. Always check the official HNMS forecast, the official warnings and any sailing ban of the Coast Guard before going out.