Berkeley — Water Temperature in September

Water Temperature Range

11°C

minimum

15°C

average

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

September: Climate and Swimming Opportunities

Average Night Air Temperature

23°C

Average Day Air Temperature

32°C

Precipitation Amount per Month

182 mm

Number of Rainy Days

Daylight per Day

12 hrs

Sunshine per Day

8 hrs

Average Wind Speed

12 km/h

Average Humidity

78%

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.