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M3 wave buoy daily averages for Dec 2025 last observation shown Data available:  to  Monthly averages for

Average Wave Height

16 ft
4.9 — 35.8 ft

Average Wave period

8 secs
5 — 14 secs

Average Water temperature

12 °C
11.4 — 12.6 °C

Average Wind

SW, 20 mph
2 — 40 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 daily averages Dec 2025 last observation shown Dec 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
6 5 ESE 15 11.8
7 5 E 20 11.7
6 5 ENE 16 11.6
8 6 E 18 11.5
8 5 ENE 20 11.7
8 6 ENE 21 11.6
10 6 ENE 22 12.1
10 7 ENE 18 12.1
10 7 NE 16 11.9
12 8 N 17 11.8
20 11 NE 11 11.9
16 8 SW 20 12.3
23 10 SW 23 12.4
28 12 WSW 23 12.4
17 8 SW 24 12.5
15 9 WSW 16 12.2
15 9 W 11 12.2
17 8 SW 24 12.2
19 9 SSW 26 12.2
25 11 WSW 18 12.1
22 9 SW 21 12.0
19 8 SW 24 12.0
22 9 SW 28 12.0
18 9 SSW 21 12.0
12 8 WSW 17 11.8
27 10 WSW 24 11.9
20 9 SW 28 12.3
20 9 W 21 12.4
17 9 W 21 12.4
21 10 W 17 12.5
13 7 WSW 17 12.5

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