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M3 wave buoy monthly averages for 2023 last observation shown Data available:  to 

Average Wave Height

9 ft
2 — 34.4 ft

Average Wave period

6 secs
4 — 12 secs

Average Water temperature

14 °C
11.3 — 19 °C

Average Wind

WSW, 17 mph
2 — 49 mph
About M3 wave buoy

M3 is an offshore data buoy in the Atlantic approaches (51.1300°N, 10.3300°W). It provides upstream observations of swell and storm conditions relevant to Ireland/UK marine forecasts. It typically measures wave height/period/direction plus basic meteorological variables.

M3 wave buoy monthly averages 2023 last observation shown Dec 2023
Month Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
15 8 WSW 24 11.5
13 7 W 22 12.4
10 7 SSW 17 14.4
9 7 SW 17 16.4
7 6 W 17 16.1
7 6 W 18 16.4
5 5 S 14 16.7
7 7 N 14 13.2
5 6 SW 12 12.3

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