Ostend — Water Temperature in May

Water Temperature Range

8°C

minimum

12°C

average

16°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	2025	2024	2023	2022
MAY 1	10°C	12°C	9°C	11°C
MAY 2	10°C	12°C	9°C	11°C
MAY 3	11°C	12°C	9°C	12°C
MAY 4	11°C	12°C	9°C	12°C
MAY 5	11°C	13°C	10°C	11°C
MAY 6	11°C	13°C	9°C	12°C
MAY 7	11°C	13°C	9°C	12°C
MAY 8	11°C	13°C	10°C	12°C
MAY 9	11°C	12°C	10°C	12°C
MAY 10	11°C	12°C	10°C	12°C
MAY 11	11°C	12°C	10°C	12°C
MAY 12	12°C	13°C	10°C	12°C
MAY 13	12°C	12°C	11°C	13°C
MAY 14	12°C	13°C	11°C	12°C
MAY 15	12°C	12°C	11°C	12°C
MAY 16	12°C	13°C	11°C	12°C
MAY 17	12°C	13°C	11°C	12°C
MAY 18	12°C	13°C	11°C	12°C
MAY 19	13°C	13°C	12°C	13°C
MAY 20	12°C	13°C	12°C	12°C
MAY 21	13°C	13°C	12°C	13°C
MAY 22	13°C	13°C	12°C	13°C
MAY 23	13°C	13°C	12°C	13°C
MAY 24	13°C	14°C	13°C	13°C
MAY 25	13°C	14°C	12°C	14°C
MAY 26	13°C	14°C	12°C	13°C
MAY 27	13°C	14°C	12°C	14°C
MAY 28	13°C	14°C	12°C	14°C
MAY 29	14°C	14°C	13°C	14°C
MAY 30	14°C	14°C	12°C	14°C
MAY 31	14°C	14°C	13°C	14°C

May: Climate and Swimming Opportunities

Average Night Air Temperature

10°C

Average Day Air Temperature

17°C

Precipitation Amount per Month

54 mm

Number of Rainy Days

Daylight per Day

15 hrs

Sunshine per Day

7 hrs

Average Wind Speed

19 km/h

Average Humidity

81%

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.