Latest wave and weather information

Suomenlinna (wave buoy)

25.04.2026, 17:30-18:00
Significant wave height 0.5 m
Highest individual wave ~1.0 m
Waves from south (201°)
Wavelength 25 m
Wave period 4.0 s
Water temperature 4.6 °C

Plots: 2+2 days 14 days

Data 14 days (csv)

Look at the present wave conditions.

Helsinki open sea (wave buoy)

25.04.2026, 17:30-18:00
Significant wave height 1.0 m
Highest individual wave ~2.0 m
Waves from southwest (239°)
Wavelength 37 m
Wave period 4.9 s
Water temperature 4.2 °C

Plots: 2+2 days 14 days

Data 14 days (csv)

Harmaja (weather station)

25.04.2026, 18:30-18:40
Wind speed 2.6 m/s
Gust 3.7 m/s
Wind from southwest (244°)
Air temperature 6.1 °C
Visibility 20.0 km

Plots: 2 days 14 days

Data 14 days (csv)

See also the Finnish Meteorological Institute's forecast

Kruunuvuorenselkä (weather station)

25.04.2026, 18:30-18:40
Wind speed 7.0 m/s
Gust 10.1 m/s
Wind from northwest (303°)
Air temperature 7.8 °C
Water temperature 5.0 °C

Plots: 2 days 14 days

Data 14 days (csv)

Kruunuvuorenselkä (water temperature)

25.04.2026, 18:30-18:40
Water temperature (-1.1m) 5.0 °C
Water temperature (-2.8m) 4.9 °C
Water temperature (-5.3m) 4.8 °C
Water temperature (-7.3m) 5.0 °C
Water temperature (-9.6m) 4.9 °C

Plots: 2 days 14 days 12 months

Data 14 days (csv)

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.