Rosslyn — Water Temperature in May

Water Temperature Range

20°C

minimum

24°C

average

26°C

maximum

Water Temperature Chart for May

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

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

Climate and Swimming Opportunities in Rosslyn in May

Average Day Air Temperature

24°C

Average Night Air Temperature

16°C

Precipitation Amount per Month

107 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

7 hrs

Average Wind Speed

12 km/h

Average Humidity

64%

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.