Latest wave and weather information
Suomenlinna (wave buoy)
31.05.2025, 05:30-06:00
Significant wave height 0.5 m
Highest individual wave ~1.0 m
Waves from southwest (205°)
Wavelength 21 m
Wave period 3.6 s
Water temperature 11.3 °C
Look at the present wave conditions.
Information by SMS: send BUOY SUOMENLINNA to 16161 (0,85€/message).
Helsinki open sea (wave buoy)
31.05.2025, 05:30-06:00
Significant wave height 1.0 m
Highest individual wave ~2.0 m
Waves from west (248°)
Wavelength 24 m
Wave period 3.9 s
Water temperature 10.1 °C
Harmaja (weather station)
31.05.2025, 06:30-06:40
Wind speed 9.1 m/s
Gust 11.2 m/s
Wind from southwest (242°)
Air temperature 9.4 °C
Visibility 22.1 km
See also the Finnish Meteorological Institute's forecast
Kruunuvuorenselkä (weather station)
31.05.2025, 06:30-06:40
Wind speed 7.9 m/s
Gust 9.1 m/s
Wind from southwest (244°)
Air temperature 9.3 °C
Water temperature 11.4 °C
Longer data time series from the wave buoys and Harmaja weather station
are available from the Finnish Meteorological Institute's Open data service by
download or
machine-readable WFS interface.