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

Average Wave Height

8 ft
2.3 — 28.9 ft

Average Wave period

6 secs
4 — 12 secs

Average Water temperature

16 °C
14.5 — 17.5 °C

Average Wind

S, 15 mph
2 — 36 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 Aug 2025 last observation shown Aug 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
17 8 SSW 28 14.9
9 6 S 22 15.2
9 6 W 18 15.2
15 8 WSW 23 15.3
14 8 SSW 21 15.6
22 10 SSW 23 15.8
13 7 SSE 23 16.3
6 5 SSE 13 16.7
4 6 S 12 16.8
5 7 S 10 16.9
3 6 W 6 16.9
3 5 ESE 5 16.8
3 5 NE 8 16.6
3 4 ENE 9 16.2
3 5 E 10 15.7
4 4 ENE 17 15.9
4 7 ENE 6 15.7
4 7 SE 4 15.4
4 6 N 8 15.3
5 7 NE 5 15.3
6 7 S 9 14.8
8 6 SSW 15 14.7
14 8 WSW 20 14.7
13 7 SW 27 14.7
11 7 WSW 22 14.8
10 6 SSW 22 14.8
13 7 W 20 14.6
5 6 NW 12 15.5
Realtime data displayed on this page is from the Met Office Marine observations .

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