September weather forecast and climate
Heligoland, Germany

Average sea temperature in September - Heligoland, Germany
  • Average sea temperature in September: 17.6°C

The best month for swimming (with the highest average sea temperature) is August (18.3°C).
Coldest months (with the lowest average sea temperature) are January and February (4.4°C).

Average daylight in September - Heligoland, Germany
  • Average daylight in September: 12.7h

The month with the longest days is June (Average daylight: 17.1h).
The month with shortest days is December (Average daylight: 7.4h).

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