M4 wave buoy daily averages for Dec 2024 last observation shown Tue, Dec 31, 2024, 23:00 oldest observation available Apr 2023 Monthly averages for 2024

Average Wave Height

15 ft

5.9 — 36.1 ft

Average Wave period

8 secs

5 — 12 secs

Average Water temperature

12 °C

11.2 — 12.3 °C

Average Wind

WSW, 22 mph

2 — 45 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 Dec 2024 last observation shown Dec 2024
Day	Wave height (ft)	Wave Period (s)	Wind Direction	Wind Speed (mph)	Water Temp (°C)
Dec 31	20	8	WSW	32	11.3
Dec 30	18	8	SW	30	11.3
Dec 29	17	8	WSW	27	11.3
Dec 28	15	9	W	16	11.3
Dec 27	13	9	SSW	16	11.3
Dec 26	17	10	NNE	13	11.3
Dec 25	18	9	SW	24	11.3
Dec 24	16	8	SW	25	11.3
Dec 23	16	8	WSW	21	11.3
Dec 22	31	10	NW	32	11.3
Dec 21	26	9	W	35	11.4
Dec 20	14	8	WSW	25	11.4
Dec 19	15	8	WNW	25	11.4
Dec 18	15	8	WNW	24	11.5
Dec 17	13	7	S	25	11.6
Dec 16	17	8	WSW	24	11.6
Dec 15	13	7	WSW	26	11.6
Dec 14	10	7	W	21	11.6
Dec 13	12	9	W	15	11.6
Dec 12	8	8	S	9	11.7
Dec 11	7	8	SSE	9	11.7
Dec 10	9	9	SE	5	11.7
Dec 9	9	9	E	6	11.8
Dec 8	14	8	N	20	11.9
Dec 7	23	9	NNW	37	11.9
Dec 6	16	8	SSW	23	12.0
Dec 5	16	8	W	25	12.2
Dec 4	12	7	SSW	25	12.1
Dec 3	9	6	SW	20	12.2
Dec 2	17	9	N	15	12.1
Dec 1	11	7	W	22	12.2

Realtime data displayed on this page is from the Met Office Marine observations .

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