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Sea Temperature in Helsinki in May
Complete information on the sea temperature range in the Gulf of Finland in Helsinki in May. Historical daily data. Climate details for May. Tips on swimming conditions and beach relaxation in Helsinki. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Water Temperature Range in Helsinki in May
1°C
MINIMUN
7°C
AVERAGE
13°C
MAXIMUM
Historical Data of Water Temperature in May in Helsinki
Water Temperature Chart for Gulf of Finland in Helsinki in May
Sea Temperature Table in Helsinki in May Over the Past Years
| Day | 2024 | 2023 | 2022 | Average |
|---|---|---|---|---|
| May 1 | 4°C | 4°C | 1°C | 3.0°C |
| May 2 | 5°C | 5°C | 2°C | 4.0°C |
| May 3 | 5°C | 5°C | 2°C | 4.3°C |
| May 4 | 5°C | 5°C | 2°C | 4.3°C |
| May 5 | 5°C | 5°C | 3°C | 4.5°C |
| May 6 | 5°C | 4°C | 3°C | 4.3°C |
| May 7 | 5°C | 5°C | 4°C | 4.5°C |
| May 8 | 5°C | 5°C | 4°C | 4.5°C |
| May 9 | 5°C | 5°C | 4°C | 4.5°C |
| May 10 | 5°C | 5°C | 5°C | 4.8°C |
| May 11 | 5°C | 5°C | 5°C | 5.0°C |
| May 12 | 7°C | 6°C | 6°C | 6.0°C |
| May 13 | 7°C | 6°C | 6°C | 6.0°C |
| May 14 | 7°C | 5°C | 6°C | 5.8°C |
| May 15 | 7°C | 5°C | 7°C | 6.0°C |
| May 16 | 7°C | 6°C | 7°C | 6.5°C |
| May 17 | 7°C | 6°C | 8°C | 6.8°C |
| May 18 | 7°C | 6°C | 8°C | 7.0°C |
| May 19 | 8°C | 6°C | 8°C | 7.3°C |
| May 20 | 7°C | 6°C | 9°C | 7.5°C |
| May 21 | 7°C | 6°C | 9°C | 7.5°C |
| May 22 | 7°C | 6°C | 10°C | 8.0°C |
| May 23 | 8°C | 7°C | 10°C | 8.5°C |
| May 24 | 7°C | 7°C | 10°C | 8.5°C |
| May 25 | 8°C | 7°C | 11°C | 9.0°C |
| May 26 | 8°C | 7°C | 11°C | 9.0°C |
| May 27 | 8°C | 7°C | 12°C | 9.5°C |
| May 28 | 7°C | 8°C | 12°C | 9.8°C |
| May 29 | 8°C | 8°C | 12°C | 10.3°C |
| May 30 | 8°C | 8°C | 13°C | 10.0°C |
Helsinki Climate and Swimming Opportunities in May
15°C
Average Day Air Temperature
6°C
Average Night Air Temperature
34 mm
Precipitation Amount per Month
8 days
Number of Rainy Days
17 hrs
Daylight
per Day
8 hrs
Sunshine
per Day
14 km/h
Average Wind Speed
66%
Average
humidity
Helsinki lies within the Southern Finland Province in Finland. The average daytime temperature in Helsinki in May is 15°C (59°F), while the nighttime average is 6°C (42°F). There are typically eight rainy days during the month, with a total precipitation of 34 mm (1.4 inches). The daylight duration in May in Helsinki is 17 hours, with an average of 8 hours of sunshine per day. The average wind speed in May is 14 km/h (9 mph), and the humidity level is around 66%.
The water temperature in Helsinki in May ranges from 3°C to 10°C (37°F to 50°F). At the beginning of the month, the average temperature is around 4°C (39°F), shifting to 6°C (43°F) by mid-May and reaching 9°C (48°F) in the last ten days. Overall, the average sea temperature in Helsinki for May is 6°C (43°F). The water is frigid, but with warmer air, it might be tolerable for a quick swim. Wetsuits are recommended.
Sea Temperature in May in Nearby Cities
Frequently Asked Questions About Water Temperatures in May in Helsinki
What is the sea temperature in Helsinki in May?
The water temperature in the Gulf of Finland in Helsinki in May ranges from 3°C to 10°C (37°F to 50°F).
Is it possible to swim in the Gulf of Finland in Helsinki in May?
The average sea temperature in Helsinki in May is 6°C (43°F), and the air temperature is 15°C (59°F), so the water is frigid, but with warmer air, it might be tolerable for a quick swim. Wetsuits are recommended.