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Southern North Sea
ERA5 reanalysis 2015-2024, 10 years
Roughest in Nov
53%
Week 47 · 2.6 m
Calmest in Jul
0%
Week 29 · 0.9 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
1.6 m
Wave period
5.7 s
Mean wind
37 km/h
Air temperature
12°C