M4 wave buoy monthly averages for 2025 last observation shown Data available: to
Average Wave Height
11 ft
2.3 — 41 ft
Average Wave period
7 secs
4 — 14 secs
Average Water temperature
13 °C
10 — 17.5 °C
Average Wind
SW, 19 mph
2 — 64 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.
| Month | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 14 | 9 | S | 22 | 11.4 | |
| 19 | 9 | WNW | 27 | 11.7 | |
| 11 | 7 | WSW | 20 | 13.5 | |
| 11 | 7 | SW | 20 | 14.4 | |
| 8 | 7 | SSW | 15 | 15.6 | |
| 6 | 6 | WSW | 15 | 14.9 | |
| 8 | 6 | WSW | 17 | 13.4 | |
| 6 | 6 | N | 14 | 13.2 | |
| 8 | 7 | SE | 15 | 11.3 | |
| 10 | 7 | SW | 19 | 10.9 | |
| 16 | 8 | SW | 24 | 10.9 | |
| 12 | 7 | WSW | 21 | 10.9 |