Okinawa — Water Temperature in December

Water Temperature Range

22°C

minimum

24°C

average

26°C

maximum

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

December: Climate and Swimming Opportunities

Average Night Air Temperature

16°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

104 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

3 hrs

Average Wind Speed

18 km/h

Average Humidity

71%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.