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Western Baltic

ERA5 reanalysis 2015-2024, 10 years

Roughest in Jan

15%

Week 4 · 1.2 m

Calmest in May

0%

Week 19 · 0.8 m

Week by week

Days above 2.5 m

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Rough end of the range — At the same height a long swell is a slow roll and a short chop is a hammering. Anything under about 6 seconds is chop.

Typical wave height

1.1 m

Wave period

4.1 s

Mean wind

33 km/h

Air temperature

10°C

Sailings that cross this water