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

Average Wave Height

6 ft
2.6 — 15.7 ft

Average Wave period

6 secs
4 — 8 secs

Average Water temperature

15 °C
13.6 — 15.9 °C

Average Wind

WSW, 15 mph
2 — 31 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 Jul 2025 last observation shown Jul 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
6 6 NW 14 15.6
6 6 W 13 15.6
5 5 W 14 15.5
6 6 WSW 12 15.5
9 7 W 16 15.3
11 7 WSW 20 15.4
6 5 WSW 16 15.6
5 5 SW 14 15.5
5 6 NW 12 15.5
5 5 W 13 15.5
7 5 NW 19 15.3
5 5 N 16 15.5
4 5 ENE 10 15.7
6 6 SW 13 15.5
5 5 S 17 15.2
4 5 SSE 9 15.2
7 6 N 12 15.1
4 5 SSE 12 15.1
5 6 E 11 15.0
5 6 ESE 10 14.6
6 6 S 15 14.3
7 6 SSW 18 14.1
6 5 WSW 16 14.1
5 5 WSW 14 14.0
6 5 WNW 16 13.9
8 6 NW 18 13.8
11 7 W 20 13.7
13 7 WSW 27 13.7
9 6 WSW 22 13.9
4 5 WSW 13 14.1
6 6 W 9 14.0
Realtime data displayed on this page is from the Met Office Marine observations .

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