Imperial Beach — Water Temperature in May

Water Temperature Range

15°C

minimum

20°C

average

24°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	2026	2025	2024	2023
MAY 1	-10°C	17°C	15°C	17°C
MAY 2	17°C	19°C	15°C	16°C
MAY 3	17°C	19°C	15°C	17°C
MAY 4	17°C	20°C	16°C	17°C
MAY 5	17°C	21°C	16°C	18°C
MAY 6	17°C	19°C	15°C	18°C
MAY 7	17°C	20°C	15°C	18°C
MAY 8	17°C	20°C	15°C	18°C
MAY 9	17°C	20°C	16°C	18°C
MAY 10	17°C	20°C	16°C	19°C
MAY 11	18°C	20°C	17°C	18°C
MAY 12	18°C	19°C	16°C	18°C
MAY 13	18°C	20°C	17°C	18°C
MAY 14	18°C	20°C	17°C	18°C
MAY 15	18°C	20°C	16°C	18°C
MAY 16	18°C	19°C	16°C	18°C
MAY 17	18°C	19°C	17°C	17°C
MAY 18	18°C	20°C	16°C	17°C
MAY 19	18°C	19°C	17°C	17°C
MAY 20	18°C	21°C	17°C	18°C
MAY 21	18°C	19°C	16°C	17°C
MAY 22	18°C	19°C	17°C	17°C
MAY 23	19°C	20°C	17°C	18°C
MAY 24	19°C	19°C	18°C	17°C
MAY 25	19°C	20°C	18°C	18°C
MAY 26	19°C	21°C	19°C	18°C
MAY 27	18°C	20°C	19°C	18°C
MAY 28	18°C	21°C	19°C	18°C
MAY 29	18°C	21°C	19°C	18°C
MAY 30	18°C	20°C	19°C	18°C
MAY 31	18°C	21°C	19°C	18°C

May: Climate and Swimming Opportunities

Average Night Air Temperature

14°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

5 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

12 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.