M4 wave buoy daily averages for Dec 2023 last observation shown Sun, Dec 31, 2023, 23:00 Data available: Sat, Apr 29, 2023 to Tue, Jan 6, 2026 Monthly averages for 2023

Average Wave Height

14 ft

3.9 — 33.5 ft

Average Wave period

8 secs

5 — 12 secs

Average Water temperature

11 °C

10.8 — 11.6 °C

Average Wind

W, 22 mph

2 — 43 mph

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 2023 last observation shown Dec 2023
Day	Wave height (ft)	Wave Period (s)	Wind Direction	Wind Speed (mph)	Water Temp (°C)
Dec 31	14	8	NW	19	10.8
Dec 30	15	7	SE	27	10.8
Dec 29	17	8	WNW	18	10.9
Dec 28	18	8	WSW	31	11.0
Dec 27	11	6	SW	23	11.0
Dec 26	13	8	NNE	17	11.0
Dec 25	16	8	W	25	11.1
Dec 24	19	8	W	24	11.1
Dec 23	17	8	WSW	29	11.1
Dec 22	21	9	W	30	11.1
Dec 21	26	10	WNW	32	11.1
Dec 20	20	8	W	28	11.1
Dec 19	15	7	W	25	11.2
Dec 18	12	8	W	16	11.2
Dec 17	18	8	SW	23	11.2
Dec 16	19	8	SW	28	11.2
Dec 15	20	9	SW	26	11.1
Dec 14	17	9	W	23	11.1
Dec 13	7	6	W	18	11.1
Dec 12	10	7	NNE	19	11.2
Dec 11	14	9	E	17	11.2
Dec 10	16	9	SW	18	11.3
Dec 9	14	8	W	20	11.3
Dec 8	19	9	SW	20	11.3
Dec 7	14	8	SSE	24	11.4
Dec 6	13	7	SE	32	11.3
Dec 5	6	5	ESE	16	11.3
Dec 4	6	5	NNE	18	11.3
Dec 3	5	6	ENE	10	11.3
Dec 2	5	7	NNW	6	11.4
Dec 1	7	6	N	12	11.5

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