Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Hamina, Finland

Sea temperature

In Hamina, Finland, the average seawater temperature in Octubre is 10.1°C (50.2°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.


The average length of the day in Octubre is 10.1h.

How cold is the water in Octubre in Hamina?

In Octubre, the average sea temperature in Hamina is 10.1°C (50.2°F). Swimming in 10.1°C (50.2°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Hamina have in Octubre?

In Hamina, the average length of the day in Octubre is 10.1h.
Average sea temperature in October - Hamina, Finland
  • Average sea temperature in October: 10.1°C

The best month for swimming (with the highest average sea temperature) is July (19.3°C).
The coldest month (with the lowest average sea temperature) is February (-0.5°C).

Average daylight in October - Hamina, Finland
  • Average daylight in October: 10.1h

The month with the longest days is June (Average daylight: 18.9h).
The month with shortest days is December (Average daylight: 5.9h).