M4 wave buoy daily averages for Apr 2023 last observation shown oldest observation available Monthly averages for
Average Wave Height
6 ft
4.6 — 9.2 ft
Average Wave period
7 secs
6 — 8 secs
Average Water temperature
11 °C
10.6 — 11.3 °C
Average Wind
S, 12 mph
5 — 18 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) |
|---|---|---|---|---|---|
| 7 | 7 | SW | 15 | 11.0 | |
| 5 | 6 | SSE | 9 | 11.0 |
Realtime data displayed on this page is from the
Met Office Marine observations
.