Coles Bay — Water Temperature in May

Water Temperature Range

11°C

minimum

14°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

6°C

Average Day Air Temperature

15°C

Precipitation Amount per Month

40 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

4 hrs

Average Wind Speed

17 km/h

Average Humidity

70%

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.