December weather forecast and climate
Seacliff State Beach, CA

Weather in December

Ocean temperature

In Seacliff State Beach, California, the average seawater temperature in December is 55.6°F (13.1°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.

Daylight

December has the shortest days of the year in Seacliff State Beach, with an average of 9.7h of daylight.
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FAQ

What is the water temperature in December in Seacliff State Beach?

In December, the average ocean temperature in Seacliff State Beach is 55.6°F (13.1°C). Swimming in 55.6°F (13.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Seacliff State Beach?

With an average of 9.7h of daylight, December has the shortest days of the year.

What is the average length of the day in December in Seacliff State Beach?

The average length of the day in December in Seacliff State Beach, California, is 9.7h.

Average sea temperature in December
Seacliff State Beach, CA

Average sea temperature in December - Seacliff State Beach, CA
  • Average sea temperature in December: 55.6°F

The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

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Average daylight in December
Seacliff State Beach, CA

Average daylight in December - Seacliff State Beach, CA
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

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