Stinson Beach — Water Temperature in October

Water Temperature Range

11°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	2025	2024	2023	2022
OCT 1	15°C	16°C	17°C	12°C
OCT 2	16°C	16°C	17°C	14°C
OCT 3	15°C	16°C	17°C	13°C
OCT 4	16°C	16°C	18°C	15°C
OCT 5	16°C	16°C	17°C	16°C
OCT 6	15°C	16°C	17°C	15°C
OCT 7	14°C	16°C	17°C	11°C
OCT 8	16°C	16°C	17°C	16°C
OCT 9	15°C	16°C	16°C	13°C
OCT 10	15°C	16°C	16°C	12°C
OCT 11	16°C	17°C	17°C	16°C
OCT 12	14°C	17°C	15°C	11°C
OCT 13	14°C	17°C	15°C	11°C
OCT 14	15°C	17°C	15°C	15°C
OCT 15	14°C	16°C	15°C	14°C
OCT 16	14°C	16°C	15°C	14°C
OCT 17	14°C	15°C	15°C	14°C
OCT 18	15°C	15°C	16°C	16°C
OCT 19	15°C	15°C	15°C	16°C
OCT 20	14°C	15°C	15°C	15°C
OCT 21	14°C	15°C	15°C	13°C
OCT 22	15°C	15°C	16°C	15°C
OCT 23	15°C	16°C	16°C	15°C
OCT 24	15°C	15°C	17°C	15°C
OCT 25	14°C	15°C	16°C	11°C
OCT 26	15°C	15°C	16°C	14°C
OCT 27	15°C	15°C	16°C	15°C
OCT 28	15°C	16°C	16°C	15°C
OCT 29	16°C	16°C	18°C	15°C
OCT 30	14°C	15°C	16°C	13°C
OCT 31	15°C	15°C	17°C	16°C

October: Climate and Swimming Opportunities

Average Night Air Temperature

12°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

40 mm

Number of Rainy Days

Daylight per Day

11 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 very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.