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M4 wave buoy daily averages for Oct 2023 last observation shown Data available:  to  Monthly averages for

Average Wave Height

10 ft
4.6 — 15.7 ft

Average Wave period

7 secs
4 — 10 secs

Average Water temperature

14 °C
13.2 — 14.4 °C

Average Wind

SSE, 19 mph
2 — 31 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 Oct 2023 last observation shown
Day Wave height (ft) Wave Period (s) Wind Direction Wind Speed (mph) Water Temp (°C)
9 6 SW 23 14.2
14 8 WSW 25 14.1
10 6 WSW 23 13.9
11 7 SW 17 13.9
11 7 SW 25 13.8
12 7 SW 19 14.1
12 7 SW 18 14.1
9 7 SW 16 14.2
7 7 SW 12 14.2
7 5 WSW 21 14.2
13 8 NW 17 14.1
13 8 WSW 15 14.1
13 8 WNW 22 14.1
15 8 NNW 19 14.0
11 8 W 8 13.9
6 7 SE 10 14.2
6 5 ESE 21 13.7
9 5 ESE 27 13.8
9 7 E 17 13.9
14 8 E 21 14.0
11 7 N 15 13.9
8 7 SE 8 13.7
6 5 ESE 19 13.8
6 5 ESE 17 13.8
7 5 ESE 22 13.6
11 7 SE 18 13.4
11 8 ESE 18 13.5
8 6 ESE 22 13.6
9 6 ENE 22 13.4
11 6 ENE 26 13.4
8 6 E 24 13.4

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