M4 wave buoy daily averages for May 2025 last observation shown oldest observation available Monthly averages for
Average Wave Height
6 ft
2.3 — 17.7 ft
Average Wave period
6 secs
4 — 10 secs
Average Water temperature
13 °C
11.6 — 15.8 °C
Average Wind
N, 14 mph
2 — 31 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.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 9 | 6 | SW | 24 | 12.9 | |
| 7 | 6 | SW | 16 | 12.9 | |
| 9 | 6 | SW | 20 | 12.8 | |
| 8 | 7 | SW | 13 | 13.2 | |
| 9 | 7 | W | 14 | 13.1 | |
| 13 | 8 | W | 21 | 13.1 | |
| 13 | 7 | W | 27 | 13.6 | |
| 9 | 6 | WSW | 22 | 14.2 | |
| 4 | 5 | SSW | 16 | 14.9 | |
| 3 | 5 | NNE | 6 | 15.2 | |
| 3 | 5 | N | 10 | 14.7 | |
| 4 | 5 | ENE | 10 | 14.4 | |
| 5 | 5 | ENE | 15 | 14.1 | |
| 4 | 6 | ENE | 12 | 14.4 | |
| 4 | 7 | ENE | 10 | 14.1 | |
| 4 | 6 | E | 12 | 13.6 | |
| 3 | 5 | ESE | 11 | 13.2 | |
| 4 | 5 | E | 10 | 12.9 | |
| 6 | 6 | NE | 13 | 12.7 | |
| 9 | 6 | NNE | 21 | 12.4 | |
| 10 | 8 | NNW | 15 | 12.5 | |
| 10 | 8 | SSW | 17 | 12.8 | |
| 4 | 7 | SW | 9 | 12.9 | |
| 4 | 6 | NE | 6 | 12.8 | |
| 3 | 7 | ENE | 5 | 12.5 | |
| 3 | 7 | SW | 8 | 12.3 | |
| 5 | 6 | ESE | 7 | 12.0 | |
| 6 | 5 | NE | 18 | 11.7 | |
| 7 | 6 | N | 16 | 11.9 | |
| 9 | 7 | NW | 12 | 11.9 | |
| 9 | 9 | NW | 13 | 11.9 |
Realtime data displayed on this page is from the
Met Office Marine observations
.