Mustang Island — Water Temperature in January

Water Temperature Range

12°C

minimum

16°C

average

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

January: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

51 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

4 hrs

Average Wind Speed

19 km/h

Average Humidity

77%

At such water and air temperatures, swimming often feels chilly and is best for short swims. Getting out can feel cold, so it helps to have dry clothes ready right away.