Latest wave and weather information
Suomenlinna (wave buoy)
21.04.2025, 18:30-19:00
Significant wave height 0.1 m
Highest individual wave ~0.2 m
Waves from south (169°)
Wavelength 85 m
Wave period 7.7 s
Water temperature 4.8 °C
Look at the present wave conditions.
Information by SMS: send BUOY SUOMENLINNA to 16161 (0,85€/message).
Helsinki open sea (wave buoy)
21.04.2025, 18:30-19:00
Significant wave height 0.4 m
Highest individual wave ~0.8 m
Waves from east (90°)
Wavelength 25 m
Wave period 4.0 s
Water temperature 3.8 °C
Harmaja (weather station)
21.04.2025, 19:20-19:30
Wind speed 3.3 m/s
Gust 4.2 m/s
Wind from north (21°)
Air temperature 5.8 °C
Visibility 9.4 km
See also the Finnish Meteorological Institute's forecast
Kruunuvuorenselkä (weather station)
21.04.2025, 19:20-19:30
Wind speed 3.3 m/s
Gust 4.8 m/s
Wind from northeast (57°)
Air temperature 6.8 °C
Water temperature 5.3 °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.