Koszalin — Water Temperature in May

Water Temperature Range

5°C

minimum

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

At such water and air temperatures, swimming feels icy and can be a shock to the body. If you go in at all, keep it extremely short and warm up immediately afterward.