Weather in December
Ocean temperature
In Seacliff State Beach, California, in December, the average water temperature is 55.6°F (13.1°C).Note: Diving into 55.6°F (13.1°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:01 pm PST.
Frequently asked questions
How cold is the water 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 life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
What is the month with the shortest days in Seacliff State Beach?
With an average of 9h and 42min of daylight, December has the shortest days of the year.
What is the average length of the day in December in Seacliff State Beach?
In December, the average day length in Seacliff State Beach, California, is 9h and 40min.
When is the sunrise / sunset in December in Seacliff State Beach?
In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:01 pm PST.
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).
Average daylight in December
Seacliff State Beach, CA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
Seacliff State Beach, California, USA
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