Rewal — Water Temperature in May

Water Temperature Range

5°C

minimum

10°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

17°C

Precipitation Amount per Month

53 mm

Number of Rainy Days

Daylight per Day

16 hrs

Sunshine per Day

8 hrs

Average Wind Speed

13 km/h

Average Humidity

73%

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.