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

August weather forecast and climate
Alameda, CA

Ocean temperature

In Alameda, California, in August, the average water temperature is 56.7°F (13.7°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 Alameda, the average length of the day in August is 13.6h.

What is the ocean temperature in August in Alameda?

In August, the average ocean temperature in Alameda, California, is 56.7°F (13.7°C). Swimming in 56.7°F (13.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in August in Alameda?

The average length of the day in August in Alameda, California, is 13.6h.
Average sea temperature in August - Alameda, CA
  • Average sea temperature in August: 56.7°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 August - Alameda, CA
  • Average daylight in August: 13.6h

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