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Typical conditions for the monthNOAA 1991–2020NASA POWER 2001–2020

Greece in September

In September the sea averages 22 °C or warmer in 7 of the 12 coastal regions; it is warmest in Crete (23 °C) and coolest in Eastern Macedonia and Thrace (20.4 °C). The weather is comfortable for walking and sightseeing (average temperature 16 to 24 °C, little rain) in 860 of the 1,600 towns and villages with a page; in the rest, the average temperature is above 24 °C in 447 and rain is over 50 mm in 293. On the 15th daylight lasts 12 h 32 min in Thessaloniki and 12 h 27 min in Heraklion.

Warmest sea
23.0 °CCrete, NOAA OISST 1991–2020
Coolest sea
20.4 °CEastern Macedonia and Thrace, NOAA OISST 1991–2020
Comfortable for walking
860 placesof 1,600 towns and villages with a page, NASA POWER 2001–2020
Day length, Thessaloniki
12.5 hon the 15th, Greek time
Day length, Heraklion
12.4 hon the 15th, Greek time
Rainiest regions
Epirus, Ionian Islandsaverage rain 79 and 79 mm for the month across their places (NASA POWER 2001–2020)

The sea

Average sea temperature in September at each region's official bathing-water beaches (NOAA OISST, 1991–2020). Each region links to its beaches in the beach list.

Sea by region, September
RegionSea °CBeaches at 22 °C or warmer
Crete23.0157 of 157
Peloponnese22.9145 of 145
Attica22.6125 of 158
Western Greece22.671 of 79
Ionian Islands22.5148 of 148
Epirus22.435 of 36
South Aegean22.3144 of 279
Central Greece21.733 of 140
Thessaly21.50 of 103
Central Macedonia21.10 of 114
North Aegean20.90 of 122
Eastern Macedonia and Thrace20.40 of 56
Western Macedonia–0 of 1

All bathing-water beaches in Greece

The average is taken over the beaches of the official register, not over all the sea of the region. Each NOAA cell is 0.25 degrees (about 25 km) wide, so close to the shore the temperature can differ a little. Beaches with no nearby sea cell (a lake, for example) are left out of the temperature column.

Comfortable for walking and sightseeing

Places with a page of their own where the month's average temperature is 16 to 24 °C and rain stays at or under 50 mm (NASA POWER MERRA-2, 2001–2020). Temperature is adjusted for the altitude of the place where OpenStreetMap records one. Up to 6 are shown per region: cities and towns first, then villages with a known altitude.

In September the average temperature is over 24 °C in 447 of 1,600.

Peloponnese (174 of 315)

Central Macedonia (143 of 165)

North Aegean (103 of 104)

Attica (90 of 123)

Eastern Macedonia and Thrace (89 of 89)

South Aegean (88 of 171)

Thessaly (64 of 93)

Central Greece (60 of 78)

Crete (34 of 136)

Western Greece (15 of 76)

Beside each place: the month's average temperature and, where OpenStreetMap records it, the altitude. These are regional model values, not a measurement in the place.

Islands with comfortable weather and a warm sea

7 islands with a page where the weather in the main town is comfortable in September and the sea reaches 22 °C, warmest sea first. Next to each island: mean air and sea temperature.

All islands of Greece

The weather is read at the island's main town by the same rule as the list of places (NASA POWER MERRA-2) and the sea from the nearest NOAA OISST cell. These are typical conditions, not a forecast.

Where to swim

848 beaches where the average sea temperature in September is 22 °C or warmer (NOAA OISST) and the water was classified Excellent in the 2024 season (EEA). Beaches that were Excellent in most seasons since 2011 come first. Beside each beach: municipality, sea temperature, and seasons classified Excellent out of classified seasons. Up to 6 per region.

Crete (157 beaches)

Peloponnese (143 beaches)

Attica (124 beaches)

Western Greece (69 beaches)

Ionian Islands (146 beaches)

Epirus (35 beaches)

South Aegean (141 beaches)

Central Greece (33 beaches)

All bathing-water beaches in Greece

The classification is the EU assessment based on samples from four seasons, not a reading on the day. For recent samples see the official results linked from each beach page.

Daylight

Sunrise and sunset on the 15th, north to south, in Greek local time.

Sunrise and sunset, 15 September
PlaceSunriseSunsetDay length
Thessaloniki07:0719:3912 h 32 min
Athens07:0519:3512 h 29 min
Heraklion07:0119:2812 h 27 min

Calculated from the place's position and the date, without local terrain. Day length changes by a few minutes a day, so the values hold for the middle of the month.

The other months

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Greece month by month

See also

Sources

Every figure on this page comes from the sources below, with the date each was updated.

These are typical conditions from regional models, not a forecast. Sea: NOAA OISST v2.1, 1991–2020, 0.25 degree cells. Temperature and rain: NASA POWER (MERRA-2), 2001–2020, as monthly averages. Daylight: calculated for the 15th of the month. Water quality: EEA, classified by season.

Page updated .