M4 wave buoy daily averages for Aug 2023 last observation shown Data available: to Monthly averages for
Average Wave Height
7 ft
2.3 — 11.8 ft
Average Wave period
6 secs
4 — 7 secs
Average Water temperature
16 °C
15 — 17.9 °C
Average Wind
W, 16 mph
0 — 31 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) |
|---|---|---|---|---|---|
| 7 | 6 | WSW | 12 | 15.2 | |
| 7 | 6 | NNE | 21 | 15.2 | |
| 10 | 6 | N | 23 | 15.2 | |
| 7 | 6 | SW | 15 | 15.2 | |
| 5 | 6 | NNW | 14 | 15.2 | |
| 6 | 6 | WNW | 16 | 15.3 | |
| 5 | 6 | W | 12 | 15.4 | |
| 4 | 6 | WNW | 5 | 15.6 | |
| 3 | 5 | SSE | 14 | 15.7 | |
| 7 | 6 | SE | 19 | 15.6 | |
| 8 | 6 | S | 23 | 15.5 | |
| 11 | 7 | SW | 21 | 15.4 | |
| 9 | 6 | WSW | 20 | 15.4 | |
| 5 | 5 | NNW | 14 | 15.5 | |
| 5 | 5 | NNW | 9 | 15.7 | |
| 3 | 6 | SE | 9 | 15.9 | |
| 5 | 4 | ESE | 19 | 15.8 | |
| 8 | 5 | E | 25 | 15.8 | |
| 8 | 6 | S | 23 | 15.7 | |
| 10 | 6 | S | 27 | 15.6 | |
| 11 | 6 | SSW | 26 | 15.5 | |
| 7 | 6 | WSW | 18 | 15.5 | |
| 5 | 6 | WNW | 11 | 16.2 | |
| 7 | 5 | WNW | 15 | 15.6 | |
| 6 | 5 | NNW | 15 | 15.5 | |
| 7 | 6 | N | 16 | 15.5 | |
| 6 | 5 | WNW | 15 | 15.4 | |
| 7 | 6 | W | 12 | 15.4 | |
| 9 | 6 | WNW | 16 | 15.4 | |
| 6 | 6 | SW | 10 | 15.4 | |
| 5 | 5 | S | 12 | 15.4 |