Muir Beach — Water Temperature in January

Water Temperature Range

10°C

minimum

12°C

average

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

January: Climate and Swimming Opportunities

Average Night Air Temperature

7°C

Average Day Air Temperature

16°C

Precipitation Amount per Month

144 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

6 hrs

Average Wind Speed

12 km/h

Average Humidity

79%

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.