Fort Caswell — Water Temperature in December

Water Temperature Range

11°C

minimum

15°C

average

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

December: Climate and Swimming Opportunities

Average Night Air Temperature

3°C

Average Day Air Temperature

15°C

Precipitation Amount per Month

93 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

6 hrs

Average Wind Speed

17 km/h

Average Humidity

72%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.