Santa Monica — Water Temperature in April

Water Temperature Range

12°C

minimum

15°C

average

18°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	2026	2025	2024	2023
APR 1	-10°C	18°C	13°C	14°C
APR 2	18°C	15°C	13°C	15°C
APR 3	18°C	14°C	13°C	15°C
APR 4	18°C	14°C	12°C	15°C
APR 5	17°C	15°C	12°C	15°C
APR 6	18°C	15°C	13°C	15°C
APR 7	18°C	15°C	13°C	15°C
APR 8	18°C	15°C	13°C	16°C
APR 9	19°C	16°C	14°C	15°C
APR 10	19°C	15°C	14°C	16°C
APR 11	19°C	16°C	14°C	16°C
APR 12	18°C	15°C	14°C	16°C
APR 13	18°C	15°C	14°C	17°C
APR 14	18°C	15°C	14°C	16°C
APR 15	17°C	14°C	14°C	15°C
APR 16	18°C	15°C	15°C	16°C
APR 17	18°C	16°C	15°C	16°C
APR 18	18°C	16°C	14°C	16°C
APR 19	18°C	16°C	14°C	16°C
APR 20	18°C	15°C	15°C	16°C
APR 21	18°C	16°C	14°C	17°C
APR 22	18°C	16°C	14°C	16°C
APR 23	18°C	15°C	14°C	16°C
APR 24	18°C	16°C	15°C	16°C
APR 25	18°C	15°C	15°C	16°C
APR 26	18°C	15°C	15°C	16°C
APR 27	18°C	15°C	15°C	16°C
APR 28	17°C	16°C	16°C	16°C
APR 29	17°C	16°C	16°C	16°C
APR 30	17°C	16°C	15°C	16°C

April: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

21°C

Precipitation Amount per Month

24 mm

Number of Rainy Days

Daylight per Day

13 hrs

Sunshine per Day

10 hrs

Average Wind Speed

14 km/h

Average Humidity

66%

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.