Arniston — Water Temperature in January

Water Temperature Range

19°C

minimum

21°C

average

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

January: Climate and Swimming Opportunities

Average Night Air Temperature

15°C

Average Day Air Temperature

25°C

Precipitation Amount per Month

24 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

10 hrs

Average Wind Speed

17 km/h

Average Humidity

71%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.