Harstad
Norway
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Harstad, Norway

Sea temperature

In Harstad, Norway, the average seawater temperature in September is 10.7°C (51.3°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

In Harstad, Norway, the average length of the day in September is 13.2h.

What is the water temperature in September in Harstad?

In September, the average sea temperature in Harstad, Norway, is 10.7°C (51.3°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the average length of the day in September in Harstad?

The average length of the day in September in Harstad, Norway, is 13.2h.
Average sea temperature in September - Harstad, Norway
  • Average sea temperature in September: 10.7°C

The best month for swimming (with the highest average sea temperature) is August (12.3°C).
The coldest month (with the lowest average sea temperature) is March (3.8°C).

Average daylight in September - Harstad, Norway
  • Average daylight in September: 13.2h

The month with the longest days is June (Average daylight: 24h).
The month with shortest days is December (Average daylight: 0.1h).