Climate
Climate in Syros
Air temperature, 10 m wind, sunshine hours and rain, month by month. Averages 2016-2025. This is not a trip forecast.
Recorded at Ermoupoli.
The year
The air is 18 °C or warmer from May to October.
12°
Jan
13°
Feb
14°
Mar
16°
Apr
20°
May
24°
Jun
27°
Jul
27°
Aug
24°
Sep
20°
Oct
17°
Nov
14°
Dec
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air (°C) | 12.4 | 12.7 | 13.9 | 16.2 | 19.7 | 24.2 | 26.7 | 26.5 | 24.2 | 20.4 | 17.4 | 14.1 |
| Sunshine (h) | 229 | 244 | 305 | 340 | 386 | 412 | 421 | 401 | 349 | 306 | 263 | 237 |
| Rain (mm) | 78 | 44 | 36 | 24 | 11 | 5 | 3 | 3 | 7 | 25 | 48 | 77 |
| Wind (kn) | 13.1 | 12.8 | 11.7 | 10 | 9 | 9.9 | 12.8 | 12.8 | 11.8 | 11.5 | 11.9 | 12.5 |
| Gusts (kn) | 32.3 | 31.3 | 29.5 | 26.6 | 24.4 | 24.8 | 29.1 | 29.1 | 27.6 | 26.7 | 28.5 | 30.2 |
| Sea (°C) | 16.5 | 16.3 | 16.4 | 16.9 | 18.7 | 22.3 | 24.5 | 25.5 | 24.6 | 22.2 | 20.3 | 18 |
Mean wind at 10 m, in knots. Gusts are the mean of each day's peak.
Sea temperature, averages 2022-2026. This is not the 2015-2024 series.
The seasons
Spring
March – May
17°·344 h·24 mm
10.2 kn·Sea 17°
Summer
June – August
26°·411 h·4 mm
11.8 kn·Sea 24°
Autumn
September – November
21°·306 h·27 mm
11.7 kn·Sea 22°
Winter
December – February
13°·237 h·66 mm
12.8 kn·Sea 17°
