California, USA
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Alameda, CA

Ocean temperature

In October, the average ocean temperature in Alameda, California, is 57°F (13.9°C).
Note: At temperatures below 50°F (10°C), 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 55.4°F (13°C) is not comfortable.


In October, the average length of the day is 11.2h.

How cold is the water in October in Alameda?

In Alameda, in October, the average water temperature is 57°F (13.9°C). Swimming in 57°F (13.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Alameda have in October?

The average length of the day in October in Alameda is 11.2h.
Average sea temperature in October - Alameda, CA
  • Average sea temperature in October: 56.9°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
Coldest months (with the lowest average sea temperature) are April and June (53°F).

Average daylight in October - Alameda, CA
  • Average daylight in October: 11.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).