M4 wave buoy daily averages for Apr 2025 last observation shown oldest observation available Monthly averages for
Average Wave Height
8 ft
3.6 — 14.1 ft
Average Wave period
7 secs
5 — 10 secs
Average Water temperature
11 °C
10.5 — 12.4 °C
Average Wind
SE, 15 mph
2 — 36 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) |
|---|---|---|---|---|---|
| 5 | 7 | SSW | 9 | 11.8 | |
| 7 | 7 | SE | 10 | 11.6 | |
| 8 | 6 | S | 16 | 11.4 | |
| 11 | 6 | SSW | 25 | 11.4 | |
| 9 | 7 | S | 21 | 11.3 | |
| 8 | 8 | S | 13 | 11.2 | |
| 7 | 6 | SE | 19 | 11.2 | |
| 7 | 6 | ENE | 14 | 11.3 | |
| 10 | 6 | SE | 19 | 11.2 | |
| 8 | 7 | SW | 15 | 11.2 | |
| 7 | 7 | S | 12 | 11.2 | |
| 11 | 7 | NNE | 17 | 11.2 | |
| 9 | 6 | NE | 25 | 11.3 | |
| 7 | 7 | E | 10 | 11.5 | |
| 7 | 7 | N | 13 | 11.4 | |
| 10 | 8 | NNW | 12 | 11.4 | |
| 11 | 8 | SSW | 17 | 11.4 | |
| 12 | 7 | WSW | 19 | 11.5 | |
| 9 | 7 | SW | 19 | 11.7 | |
| 5 | 6 | SSW | 11 | 12.0 | |
| 5 | 8 | SW | 7 | 11.9 | |
| 8 | 9 | ESE | 7 | 11.7 | |
| 5 | 7 | E | 10 | 11.4 | |
| 4 | 6 | SE | 8 | 11.2 | |
| 6 | 5 | ESE | 16 | 10.6 | |
| 6 | 5 | E | 19 | 11.0 | |
| 6 | 5 | E | 17 | 10.9 | |
| 5 | 5 | ENE | 18 | 11.0 | |
| 7 | 6 | ESE | 17 | 11.0 | |
| 10 | 7 | SE | 21 | 10.9 |
Realtime data displayed on this page is from the
Met Office Marine observations
.