Latest wave and weather information
Suomenlinna (wave buoy)
18.09.2025, 12:00-12:30
Significant wave height 0.5 m
Highest individual wave ~1.0 m
Waves from south (189°)
Wavelength 18 m
Wave period 3.4 s
Water temperature 16.4 °C
Look at the present wave conditions.
Information by SMS: send BUOY SUOMENLINNA to 16161 (0,85€/message).
Helsinki open sea (wave buoy)
18.09.2025, 12:00-12:30
Significant wave height 0.8 m
Highest individual wave ~1.6 m
Waves from south (200°)
Wavelength 21 m
Wave period 3.6 s
Water temperature 16.0 °C
Harmaja (weather station)
18.09.2025, 12:40-12:50
Wind speed 8.0 m/s
Gust 9.5 m/s
Wind from southwest (213°)
Air temperature 15.4 °C
Visibility 20.0 km
See also the Finnish Meteorological Institute's forecast
Kruunuvuorenselkä (weather station)
18.09.2025, 12:40-12:50
Wind speed 6.3 m/s
Gust 7.6 m/s
Wind from southwest (241°)
Air temperature 15.5 °C
Water temperature 15.7 °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.
