Siesta Key
Florida, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Siesta Key, FL

Ocean temperature

In Siesta Key, Florida, the average seawater temperature in December is 69.3°F (20.7°C).
Note: Swimming in 69.3°F (20.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

December has the shortest days of the year, with an average of 10.4h of daylight.

What is the ocean temperature in December in Siesta Key?

In Siesta Key, in December, the average water temperature is 69.3°F (20.7°C). For swimming, a surface water temperature of 69.3°F (20.7°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Siesta Key?

December has the shortest days of the year in Siesta Key, with an average of 10.4h of daylight.

How many hours of daylight does Siesta Key have in December?

The average length of the day in December in Siesta Key, Florida, is 10.4h.
Average sea temperature in December - Siesta Key, FL
  • Average sea temperature in December: 69.2°F

The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).

Average daylight in December - Siesta Key, FL
  • Average daylight in December: 10.4h

The month with the longest days is June (Average daylight: 13.8h).
The month with shortest days is December (Average daylight: 10.4h).