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M4 wave buoy daily averages for Jan 2025 last observation shown Data available:  to  Monthly averages for

Average Wave Height

12 ft
6.6 — 18.4 ft

Average Wave period

7 secs
5 — 10 secs

Average Water temperature

11 °C
10.5 — 11.3 °C

Average Wind

SW, 21 mph
2 — 38 mph

Chart showing grouped wave observations for M4. Use the table on this page for a text version of the same measurements.

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
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
16 8 N 21 11.1
10 7 N 18 11.1
10 7 WNW 16 11.1
9 8 SSW 12 11.0
8 7 NE 18 11.1
16 7 N 30 11.1
15 8 NNW 23 11.0
12 8 N 16 10.9
9 7 NE 15 10.9
10 6 ESE 25 10.9
10 8 SW 12 11.0
10 6 S 25 11.0
13 7 SW 22 11.0
12 7 SSW 22 11.0
14 8 SSW 25 11.0
15 8 S 28 11.1
14 7 SSW 27 11.1
13 7 S 24 11.1
13 8 S 18 11.1
11 8 WSW 15 11.0
8 7 W 14 11.0
8 7 WNW 10 10.9
11 6 SW 25 10.9
16 7 SE 32 10.9
15 8 SW 23 10.7
13 8 ESE 25 10.8
14 8 ENE 26 10.8
13 7 NNW 21 10.7
10 7 NNW 20 10.7
11 7 WSW 22 10.5
13 8 WSW 19 10.6

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