San Juan Del Sur — Water Temperature in December

Water Temperature Range

25°C

minimum

27°C

average

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

December: Climate and Swimming Opportunities

Average Night Air Temperature

20°C

Average Day Air Temperature

31°C

Precipitation Amount per Month

21 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

15 km/h

Average Humidity

74%

At such water and air temperatures, swimming feels truly comfortable and relaxing. The warm water won’t cool you down, so you can stay in for a long time without getting chilled.