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

Average Wave Height

11 ft
2.3 — 29.2 ft

Average Wave period

7 secs
4 — 10 secs

Average Water temperature

13 °C
12.8 — 14.3 °C

Average Wind

WSW, 21 mph
2 — 56 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 Oct 2025 last observation shown Oct 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
20 8 W 33 12.9
16 8 W 24 12.9
12 7 WNW 27 13.0
12 7 NW 27 13.1
15 7 N 27 13.1
16 8 WNW 30 13.2
10 7 WNW 14 13.5
10 6 WNW 23 13.5
6 7 WNW 13 13.5
9 7 SE 15 13.4
7 5 SE 26 13.5
4 4 SE 18 13.8
3 5 SSE 10 13.7
4 7 ESE 9 13.9
4 8 ENE 7 13.6
4 6 S 10 13.5
5 6 SE 10 13.5
7 7 SW 11 13.4
12 8 WSW 18 13.4
13 8 W 20 13.5
13 8 WSW 22 13.4
14 8 WSW 18 13.3
14 7 SSW 31 13.5
20 9 WSW 27 13.5
25 9 WNW 36 13.5
14 7 SW 34 14.0
10 8 SW 12 14.2
12 7 SSW 25 14.2
Realtime data displayed on this page is from the Met Office Marine observations .

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