Zhoushan — Water Temperature in December

Water Temperature Range

9°C

minimum

14°C

average

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

December: Climate and Swimming Opportunities

Average Night Air Temperature

6°C

Average Day Air Temperature

11°C

Precipitation Amount per Month

52 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

4 hrs

Average Wind Speed

15 km/h

Average Humidity

73%

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.