Weather in May
The weather in
Kotka during
May reveals a full-fledged spring. Daylight hours extend significantly, and sea temperatures continue to rise, averaging an inviting 7.1°C (44.8°F). The increased sunlight and warmth encourage the full bloom of flowers, transforming the city into a vibrant, blooming spectacle. Compared to the preceding months, May’s weather sets the stage for the upcoming summer.
Sea temperature
In Kotka, the average seawater temperature in May is 7.1°C (44.8°F).
Note: Dipping into 7.1°C (44.8°F) below 10°C (50°F) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 13°C (55.4°F) feels cold to the bone.
Daylight
The average length of the day in May is 17h and 19min.
On the first day of the month, sunrise is at 05:05 and sunset at 21:12. On the last day of May, sunrise is at 03:57 and sunset at 22:22 EEST.