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September beach conditions — historical average

Excellent
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25.4°C Temp
25.1°C Sea temp
0.2 Rain days
11.7h Sunshine hrs
63.8% Humidity
100%

Reliable conditions

5 of 5 years were good

Year by year — mid September

2024 Excellent 26.1°C · 0 rainy days · 11.6h sun
2023 Excellent 25.4°C · 0 rainy days · 11.8h sun
2022 Excellent 25.4°C · 0 rainy days · 11.8h sun
2021 Excellent 25.6°C · 0 rainy days · 11.9h sun
2020 Good 24.7°C · 1 rainy day · 11.4h sun

Other months in Syros

May June July August September October

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Each trip type is scored on what matters most for it — snow days for skiing, sea temp for beach, sunshine for sightseeing.

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About Syros in September

Based on 5 years of ERA5 historical climate data, September in Syros has historically been excellent for a beach holiday. Average temperatures of 25.4°C with sea temperatures around 25.1°C and 0.2 rainy days on average.

5 of the last 5 years had good beach conditions during this period. This data uses ERA5 reanalysis records — real historical measurements, not generalised averages.

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