M4 wave buoy daily averages for Nov 2023 last observation shown Data available: to Monthly averages for
Average Wave Height
12 ft
4.6 — 18.7 ft
Average Wave period
7 secs
5 — 11 secs
Average Water temperature
12 °C
11.5 — 13.5 °C
Average Wind
W, 19 mph
2 — 40 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) |
|---|---|---|---|---|---|
| 12 | 7 | S | 24 | 13.3 | |
| 14 | 8 | S | 18 | 12.9 | |
| 12 | 8 | NW | 13 | 12.9 | |
| 9 | 7 | NNE | 14 | 13.1 | |
| 12 | 8 | WNW | 18 | 13.1 | |
| 14 | 7 | WNW | 23 | 12.7 | |
| 11 | 7 | W | 18 | 12.7 | |
| 15 | 7 | WSW | 30 | 12.4 | |
| 18 | 10 | ENE | 16 | 12.3 | |
| 15 | 8 | NNW | 22 | 12.1 | |
| 8 | 6 | E | 16 | 12.1 | |
| 8 | 5 | SE | 24 | 12.1 | |
| 12 | 8 | SW | 17 | 12.0 | |
| 14 | 8 | WSW | 23 | 12.0 | |
| 12 | 7 | W | 20 | 11.9 | |
| 8 | 6 | SSW | 19 | 12.0 | |
| 11 | 7 | SSE | 18 | 11.9 | |
| 11 | 6 | SSW | 24 | 11.9 | |
| 16 | 9 | WSW | 18 | 11.9 | |
| 15 | 7 | NNW | 25 | 11.9 | |
| 7 | 6 | W | 17 | 11.8 | |
| 15 | 8 | WSW | 26 | 11.8 | |
| 18 | 8 | W | 25 | 11.8 | |
| 14 | 9 | NNE | 13 | 11.7 | |
| 11 | 8 | SE | 17 | 11.7 | |
| 9 | 7 | SSW | 14 | 11.7 | |
| 8 | 6 | NNE | 17 | 11.7 | |
| 6 | 6 | NNW | 9 | 11.6 | |
| 6 | 6 | ENE | 17 | 11.6 | |
| 7 | 6 | NE | 17 | 11.5 |