Santa Barbara — Water Temperature in September

Water Temperature Range

14°C

minimum

18°C

average

21°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	2025	2024	2023	2022
SEP 1	19°C	20°C	19°C	20°C
SEP 2	19°C	20°C	18°C	19°C
SEP 3	19°C	20°C	18°C	19°C
SEP 4	20°C	21°C	19°C	20°C
SEP 5	18°C	20°C	18°C	20°C
SEP 6	18°C	19°C	18°C	19°C
SEP 7	18°C	20°C	17°C	19°C
SEP 8	19°C	20°C	18°C	20°C
SEP 9	19°C	19°C	18°C	19°C
SEP 10	19°C	19°C	18°C	19°C
SEP 11	19°C	20°C	18°C	19°C
SEP 12	18°C	20°C	18°C	18°C
SEP 13	19°C	19°C	18°C	19°C
SEP 14	18°C	19°C	18°C	19°C
SEP 15	18°C	19°C	18°C	19°C
SEP 16	18°C	18°C	17°C	18°C
SEP 17	18°C	19°C	17°C	18°C
SEP 18	18°C	19°C	16°C	19°C
SEP 19	18°C	19°C	16°C	18°C
SEP 20	18°C	19°C	17°C	18°C
SEP 21	18°C	19°C	17°C	18°C
SEP 22	18°C	19°C	18°C	18°C
SEP 23	18°C	19°C	17°C	19°C
SEP 24	18°C	19°C	17°C	19°C
SEP 25	18°C	19°C	17°C	19°C
SEP 26	18°C	19°C	17°C	20°C
SEP 27	18°C	18°C	17°C	19°C
SEP 28	18°C	19°C	17°C	19°C
SEP 29	19°C	18°C	18°C	20°C
SEP 30	19°C	19°C	18°C	20°C

September: Climate and Swimming Opportunities

Average Night Air Temperature

14°C

Average Day Air Temperature

26°C

Precipitation Amount per Month

5 mm

Number of Rainy Days

Daylight per Day

12 hrs

Sunshine per Day

9 hrs

Average Wind Speed

13 km/h

Average Humidity

74%

With such a ratio between the average monthly temperatures of water and air, the swim feels brisk and very refreshing. The air is warm enough to make the cool water easy to handle, especially for short swims.