M4 wave buoy daily averages for Jan 2026 last observation shown Data available: to Monthly averages for
Average Wave Height
12 ft
6.9 — 17.7 ft
Average Wave period
8 secs
6 — 9 secs
Average Water temperature
11 °C
10.4 — 11.3 °C
Average Wind
NNW, 23 mph
12 — 33 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.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 12 | 8 | NNW | 22 | 11.0 | |
| 14 | 8 | N | 26 | 10.9 | |
| 14 | 8 | N | 23 | 10.8 | |
| 10 | 8 | NNW | 21 | 10.6 | |
| 11 | 8 | NNW | 21 | 10.6 | |
| 9 | 7 | WSW | 24 | 10.7 | |
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