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Jastarnia Sea Temperature in May

Poland

April Jastarnia year-round → June

Average sea temperature for Jastarnia, Poland across May, based on 10 years of daily readings.

Average

9.53° C

High

16.3° C

Low

5.84° C

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

May is the 7th warmest of 12 months at Jastarnia. On average the water sits 1.2° than the year-round mean of 10.76° C.

Compared to April, May is 4.1° warmer than (5.45° C in April). By June the water is usually 15.26° C.

Jastarnia Day-by-Day Water Temperature in May

10-year low, average and high

4.0° C
7.5° C
11.0° C
14.5° C
18.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through May. Range Average

Each vertical bar above is one day of May. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Jastarnia.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

May Water Temperature Table for Jastarnia

10-year daily averages

Day Average Low High
May 1 6.96° C 6° C 8.02° C
May 2 7.14° C 5.94° C 8.34° C
May 3 7.33° C 5.94° C 8.73° C
May 4 7.32° C 5.96° C 8.66° C
May 5 7.54° C 5.84° C 8.86° C
May 6 7.68° C 5.92° C 9.17° C
May 7 7.98° C 6.16° C 10.26° C
May 8 8.17° C 6.28° C 10.78° C
May 9 8.38° C 6.56° C 11.14° C
May 10 8.82° C 6.82° C 12.92° C
May 11 8.97° C 6.87° C 12.24° C
May 12 8.91° C 7.34° C 11.73° C
May 13 9.29° C 7.41° C 12.51° C
May 14 9.33° C 7.46° C 12.73° C
May 15 9.36° C 7.67° C 13.7° C
May 16 9.39° C 7.96° C 13.94° C
May 17 9.52° C 7.83° C 13.82° C
May 18 9.65° C 8.02° C 12.21° C
May 19 9.96° C 8.06° C 11.79° C
May 20 10.36° C 8.27° C 12.39° C
May 21 10.37° C 8.37° C 12.6° C
May 22 10.62° C 8.43° C 12.79° C
May 23 10.88° C 8.59° C 13.35° C
May 24 11.16° C 8.92° C 13.54° C
May 25 11.25° C 9.2° C 13.5° C
May 26 11.2° C 9.16° C 13.45° C
May 27 11.44° C 9.18° C 14° C
May 28 11.78° C 9.36° C 15.39° C
May 29 12.06° C 9.9° C 16.3° C
May 30 12.33° C 10.27° C 15.86° C
May 31 12.39° C 10.25° C 15.86° C

Where May Sits in the Year

May highlighted

-1.5° C
5.9° C
13.3° C
20.6° C
28.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
4.94° C
3.86° C
4.04° C
5.45° C
9.53° C
15.26° C
18.17° C
19.48° C
17.65° C
13.58° C
10.2° C
6.95° C
10-year monthly history for Jastarnia. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in May

Compare other Poland water for the same month

Jastarnia Location

54.6957, 18.6788

54.69573, 18.67884 View on OpenStreetMap →

Jastarnia sits at 54.6957°N, 18.6788°E, on the coast of Poland. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Jastarnia