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St. Marks lighthouse, Apalachee Bay Sea Temperature in December

Florida, United States

November St. Marks lighthouse, Apalachee Bay year-round → January

Average sea temperature for St. Marks lighthouse, Apalachee Bay, United States across December, based on 10 years of daily readings.

Average

16.03° C

High

20.29° C

Low

9.77° C

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

December is the 10th warmest of 12 months at St. Marks lighthouse, Apalachee Bay. On average the water sits 6.9° than the year-round mean of 22.94° C.

Compared to November, December is 4.2° cooler than (20.2° C in November). By January the water is usually 13.91° C.

St. Marks lighthouse, Apalachee Bay Day-by-Day Water Temperature in December

10-year low, average and high

8.0° C
11.5° C
15.0° C
18.5° C
22.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through December. Range Average

Each vertical bar above is one day of December. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at St. Marks lighthouse, Apalachee Bay.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

December Water Temperature Table for St. Marks lighthouse, Apalachee Bay

10-year daily averages

Day Average Low High
December 1 17.96° C 15.83° C 20.29° C
December 2 17.66° C 15.88° C 20.2° C
December 3 17.42° C 15.63° C 19.85° C
December 4 17.1° C 14.99° C 19.64° C
December 5 17.03° C 15.06° C 19.33° C
December 6 16.99° C 14.71° C 19° C
December 7 16.83° C 14.41° C 18.45° C
December 8 16.42° C 14.04° C 18.89° C
December 9 16.54° C 13.97° C 19.13° C
December 10 16.58° C 13.34° C 19.35° C
December 11 16.56° C 13.77° C 19.58° C
December 12 16.52° C 14.25° C 19.64° C
December 13 16.48° C 14.11° C 19.49° C
December 14 16.33° C 13.91° C 19.26° C
December 15 16.26° C 14.06° C 19.27° C
December 16 16.26° C 13.75° C 19.08° C
December 17 16.22° C 12.98° C 19.1° C
December 18 15.98° C 13.12° C 19.27° C
December 19 15.95° C 13.04° C 19.31° C
December 20 15.99° C 13.57° C 19.85° C
December 21 15.77° C 13.43° C 19.48° C
December 22 15.25° C 13.55° C 18.09° C
December 23 14.91° C 13.99° C 17.29° C
December 24 14.66° C 13.34° C 16.86° C
December 25 14.53° C 12.42° C 16.51° C
December 26 14.31° C 10.84° C 16.47° C
December 27 14.49° C 9.94° C 16.77° C
December 28 14.84° C 9.77° C 17.3° C
December 29 15.06° C 9.91° C 17.71° C
December 30 15.1° C 10.17° C 18.51° C
December 31 14.9° C 9.86° C 19.13° C

Where December Sits in the Year

December highlighted

6.5° C
13.5° C
20.5° C
27.5° C
34.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
13.91° C
15.07° C
19.27° C
22.5° C
25.81° C
28.66° C
30.06° C
30.38° C
28.79° C
24.59° C
20.2° C
16.03° C
10-year monthly history for St. Marks lighthouse, Apalachee Bay. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in December

Compare other United States water for the same month

St. Marks lighthouse, Apalachee Bay Location

30.0783, -84.1783

30.07830, -84.17830 View on OpenStreetMap →

St. Marks lighthouse, Apalachee Bay sits at 30.0783°N, 84.1783°W, on the coast of Florida, United States. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to St. Marks lighthouse, Apalachee Bay