Riviera Beach — Water Temperature in December

Water Temperature Range

13°C

minimum

20°C

average

24°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2025	2024	2023	2022
DEC 1	21°C	22°C	21°C	20°C
DEC 2	20°C	20°C	22°C	19°C
DEC 3	21°C	22°C	22°C	20°C
DEC 4	20°C	21°C	21°C	19°C
DEC 5	20°C	19°C	21°C	20°C
DEC 6	20°C	20°C	22°C	19°C
DEC 7	20°C	19°C	20°C	20°C
DEC 8	20°C	19°C	20°C	20°C
DEC 9	20°C	18°C	20°C	20°C
DEC 10	20°C	19°C	21°C	20°C
DEC 11	19°C	19°C	18°C	19°C
DEC 12	20°C	18°C	20°C	20°C
DEC 13	20°C	20°C	19°C	19°C
DEC 14	20°C	20°C	19°C	20°C
DEC 15	20°C	19°C	20°C	20°C
DEC 16	20°C	18°C	20°C	19°C
DEC 17	19°C	18°C	20°C	19°C
DEC 18	20°C	19°C	21°C	19°C
DEC 19	20°C	19°C	21°C	19°C
DEC 20	19°C	18°C	21°C	19°C
DEC 21	19°C	19°C	20°C	20°C
DEC 22	19°C	20°C	19°C	20°C
DEC 23	19°C	20°C	18°C	20°C
DEC 24	19°C	20°C	19°C	20°C
DEC 25	20°C	21°C	20°C	20°C
DEC 26	19°C	21°C	20°C	19°C
DEC 27	19°C	21°C	21°C	19°C
DEC 28	19°C	21°C	20°C	19°C
DEC 29	19°C	21°C	20°C	19°C
DEC 30	19°C	22°C	20°C	18°C
DEC 31	18°C	19°C	20°C	18°C

December: Climate and Swimming Opportunities

Average Night Air Temperature

10°C

Average Day Air Temperature

19°C

Precipitation Amount per Month

47 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

4 hrs

Average Wind Speed

20 km/h

Average Humidity

77%

With such a ratio between the average monthly temperatures of water and air, swimming can feel slightly cool at first but still quite doable. It’s more comfortable if the sun is out, and you may want a towel or hoodie right after.