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

Average Wave Height

12 ft
6.6 — 37.1 ft

Average Wave period

7 secs
5 — 11 secs

Average Water temperature

11 °C
10.5 — 11.3 °C

Average Wind

WSW, 21 mph
2 — 64 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 Jan 2025 last observation shown Jan 2025
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
13 8 WSW 19 10.6
11 7 WSW 22 10.5
10 7 NNW 20 10.7
13 7 NNW 21 10.7
14 8 ENE 26 10.8
13 8 ESE 25 10.8
18 9 WSW 24 10.8
23 9 W 36 10.9
11 6 SW 25 10.9
8 7 WNW 10 10.9
8 7 W 14 11.0
11 8 WSW 15 11.0
13 8 S 18 11.1
13 7 S 24 11.1
14 7 SSW 27 11.1
15 8 S 28 11.1
14 8 SSW 25 11.0
12 7 SSW 22 11.0
13 7 SW 22 11.0
10 6 S 25 11.0
10 8 SW 12 11.0
10 6 ESE 25 10.9
9 7 NE 15 10.9
12 8 N 16 10.9
15 8 NNW 23 11.0
17 8 N 30 11.1
8 7 NE 18 11.1
9 8 SSW 12 11.0
10 7 WNW 16 11.1
10 7 N 18 11.1
17 8 N 22 11.1
Realtime data displayed on this page is from the Met Office Marine observations .

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