M4 wave buoy daily averages for Oct 2024 last observation shown Data available: to Monthly averages for
Average Wave Height
10 ft
4.6 — 18.4 ft
Average Wave period
7 secs
5 — 11 secs
Average Water temperature
13 °C
12.5 — 14 °C
Average Wind
S, 20 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) |
|---|---|---|---|---|---|
| 6 | 5 | NNE | 17 | 13.6 | |
| 5 | 6 | E | 14 | 13.7 | |
| 7 | 5 | SE | 23 | 13.7 | |
| 8 | 6 | S | 21 | 13.7 | |
| 8 | 5 | SE | 23 | 13.6 | |
| 8 | 7 | SE | 16 | 13.7 | |
| 11 | 8 | ESE | 14 | 13.7 | |
| 9 | 7 | NE | 16 | 13.6 | |
| 14 | 7 | NNE | 26 | 13.6 | |
| 9 | 6 | NNW | 16 | 13.6 | |
| 8 | 6 | WSW | 20 | 13.4 | |
| 12 | 7 | NW | 22 | 13.3 | |
| 11 | 7 | SSE | 20 | 13.3 | |
| 8 | 6 | S | 19 | 13.4 | |
| 9 | 6 | SE | 23 | 13.4 | |
| 10 | 8 | SSE | 12 | 13.5 | |
| 10 | 8 | SW | 14 | 13.5 | |
| 13 | 7 | SSW | 27 | 13.4 | |
| 16 | 8 | SSE | 23 | 13.3 | |
| 16 | 7 | SSE | 34 | 13.0 | |
| 15 | 8 | WSW | 25 | 12.8 | |
| 13 | 8 | WSW | 20 | 12.8 | |
| 13 | 7 | S | 26 | 13.0 | |
| 14 | 8 | N | 23 | 13.0 | |
| 12 | 7 | NNE | 23 | 13.1 | |
| 10 | 7 | W | 19 | 13.1 | |
| 14 | 8 | SW | 22 | 13.0 | |
| 11 | 8 | W | 17 | 12.9 | |
| 10 | 9 | W | 10 | 13.0 | |
| 7 | 7 | SW | 12 | 13.1 | |
| 9 | 6 | SW | 21 | 13.1 |