M4 wave buoy daily averages for Dec 2025 last observation shown Wed, Dec 31, 2025, 23:00 Data available: Sat, Apr 29, 2023 to Tue, Jan 6, 2026 Monthly averages for 2025

Average Wave Height

14 ft

3.9 — 35.8 ft

Average Wave period

9 secs

5 — 14 secs

Average Water temperature

11 °C

10.8 — 11.6 °C

Average Wind

S, 22 mph

2 — 49 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 2025 last observation shown Dec 2025
Day	Wave height (ft)	Wave Period (s)	Wind Direction	Wind Speed (mph)	Water Temp (°C)
Dec 31	6	8	WSW	14	11.1
Dec 30	5	7	ESE	14	11.1
Dec 29	5	8	E	13	11.3
Dec 28	5	7	E	13	11.2
Dec 27	5	6	ENE	19	11.1
Dec 26	5	6	ENE	17	11.2
Dec 25	7	7	ESE	17	11.2
Dec 24	9	9	E	17	11.2
Dec 23	8	9	ENE	7	11.2
Dec 22	10	9	ENE	7	11.3
Dec 21	18	11	SE	14	11.3
Dec 20	14	8	SE	31	11.3
Dec 19	22	10	SW	29	11.3
Dec 18	30	13	SSW	26	11.3
Dec 17	19	9	SSW	32	11.4
Dec 16	16	9	SW	26	11.3
Dec 15	17	10	SW	22	11.4
Dec 14	15	9	SW	24	11.4
Dec 13	23	10	SSW	37	11.4
Dec 12	24	11	SSW	28	11.4
Dec 11	20	10	SSW	30	11.4
Dec 10	18	8	SW	35	11.5
Dec 9	16	9	SSE	32	11.5
Dec 8	14	9	S	24	11.5
Dec 7	12	8	SSW	19	11.5
Dec 6	17	10	WSW	16	11.5
Dec 5	15	8	SSE	27	11.5
Dec 4	18	10	SSW	20	11.5
Dec 3	14	8	SW	20	11.6
Dec 2	19	9	SW	27	11.6
Dec 1	13	8	SW	19	11.6

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