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M4 wave buoy daily averages for Mar 2025 last observation shown oldest observation available Monthly averages for

Average Wave Height

10 ft
3.6 — 21.7 ft

Average Wave period

7 secs
4 — 12 secs

Average Water temperature

11 °C
10 — 11.2 °C

Average Wind

SW, 19 mph
2 — 40 mph
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About M4 wave buoy

M4 is an offshore data buoy in the Atlantic approaches (55.0000°N, 10.0000°W). It supports marine forecasting by providing real‑time sea‑state and weather observations in open water. It typically reports directional waves and meteorology.

M4 wave buoy daily averages Mar 2025 last observation shown Mar 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
11 8 S 16 10.9
14 8 WSW 17 10.8
16 8 WSW 26 10.7
18 8 WNW 26 10.7
11 7 WSW 22 10.8
9 6 SSW 22 10.9
6 6 W 12 10.7
7 6 WSW 18 10.4
9 7 NNW 18 10.7
13 7 NNW 24 11.1
7 5 SSE 18 11.1
4 5 SE 18 11.1
5 6 SE 13 10.8
7 6 SE 20 10.5
5 5 SE 20 10.3
4 7 E 9 10.5
5 7 N 7 10.9
7 6 NE 18 11.0
6 6 NNW 14 11.0
9 6 NNE 21 11.0
8 6 NNE 18 11.1
14 8 NE 26 11.1
7 7 NE 13 11.1
7 7 ESE 16 10.9
10 8 SE 15 11.0
17 8 SSW 26 11.0
18 8 SSW 30 11.1
17 8 SW 31 11.1
17 10 WSW 17 11.0
17 9 SW 24 11.0
18 11 W 14 11.0
Realtime data displayed on this page is from the Met Office Marine observations .

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