M4 wave buoy daily averages for Dec 2024 last observation shown Data available: to Monthly averages for
Average Wave Height
14 ft
5.9 — 26.2 ft
Average Wave period
8 secs
5 — 12 secs
Average Water temperature
12 °C
11.2 — 12.3 °C
Average Wind
WSW, 21 mph
2 — 45 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.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 11 | 7 | W | 22 | 12.2 | |
| 17 | 9 | N | 15 | 12.1 | |
| 9 | 6 | SW | 20 | 12.2 | |
| 12 | 7 | SSW | 25 | 12.1 | |
| 16 | 8 | W | 25 | 12.2 | |
| 16 | 8 | SSW | 23 | 12.0 | |
| 22 | 9 | NNW | 36 | 11.9 | |
| 14 | 8 | N | 20 | 11.9 | |
| 9 | 9 | E | 6 | 11.8 | |
| 9 | 9 | SE | 5 | 11.7 | |
| 7 | 8 | SSE | 9 | 11.7 | |
| 8 | 8 | S | 9 | 11.7 | |
| 12 | 9 | W | 15 | 11.6 | |
| 10 | 7 | W | 21 | 11.6 | |
| 13 | 7 | WSW | 26 | 11.6 | |
| 17 | 8 | WSW | 24 | 11.6 | |
| 13 | 7 | S | 25 | 11.6 | |
| 15 | 8 | WNW | 24 | 11.5 | |
| 15 | 8 | WNW | 25 | 11.4 | |
| 14 | 8 | WSW | 25 | 11.4 | |
| 19 | 8 | WSW | 33 | 11.4 | |
| 24 | 10 | NW | 22 | 11.3 | |
| 16 | 8 | WSW | 21 | 11.3 | |
| 16 | 8 | SW | 25 | 11.3 | |
| 18 | 9 | SW | 24 | 11.3 | |
| 17 | 10 | NNE | 13 | 11.3 | |
| 13 | 9 | SSW | 16 | 11.3 | |
| 15 | 9 | W | 16 | 11.3 | |
| 17 | 8 | WSW | 27 | 11.3 | |
| 18 | 8 | SW | 30 | 11.3 | |
| 20 | 8 | WSW | 32 | 11.3 |