M4 wave buoy monthly averages for 2024 last observation shown Data available: to
Average Wave Height
9 ft
2.3 — 17.1 ft
Average Wave period
7 secs
4 — 12 secs
Average Water temperature
12 °C
9.4 — 15.3 °C
Average Wind
W, 17 mph
2 — 54 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.
| Month | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 11 | 7 | WNW | 18 | 10.6 | |
| 11 | 7 | WSW | 20 | 10.6 | |
| 10 | 7 | ESE | 20 | 10.1 | |
| 9 | 7 | NNW | 16 | 10.6 | |
| 6 | 6 | N | 13 | 12.5 | |
| 8 | 6 | WNW | 16 | 13.0 | |
| 6 | 6 | W | 14 | 13.7 | |
| 9 | 6 | SW | 19 | 14.0 | |
| 8 | 6 | N | 16 | 14.0 | |
| 10 | 7 | S | 19 | 13.3 | |
| 9 | 7 | S | 17 | 12.9 | |
| 12 | 8 | WSW | 19 | 11.7 |