M4 wave buoy daily averages for Jun 2023 last observation shown Data available: to Monthly averages for
Average Wave Height
5 ft
2 — 10.2 ft
Average Wave period
5 secs
3 — 8 secs
Average Water temperature
15 °C
13 — 18.3 °C
Average Wind
SE, 14 mph
0 — 33 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) |
|---|---|---|---|---|---|
| 5 | 5 | NE | 19 | 13.2 | |
| 4 | 4 | NE | 16 | 13.4 | |
| 4 | 4 | NE | 17 | 13.5 | |
| 4 | 4 | ENE | 18 | 13.7 | |
| 3 | 4 | ENE | 13 | 13.9 | |
| 3 | 4 | ENE | 15 | 14.6 | |
| 4 | 4 | ENE | 16 | 14.7 | |
| 4 | 4 | E | 18 | 14.8 | |
| 4 | 4 | E | 15 | 14.6 | |
| 3 | 4 | ESE | 12 | 14.7 | |
| 3 | 6 | SE | 4 | 14.9 | |
| 3 | 6 | S | 6 | 15.5 | |
| 2 | 5 | NNE | 7 | 15.4 | |
| 3 | 5 | E | 7 | 16.0 | |
| 3 | 6 | ENE | 4 | 16.7 | |
| 4 | 6 | E | 11 | 16.9 | |
| 4 | 5 | ESE | 10 | 16.9 | |
| 3 | 5 | ESE | 14 | 17.1 | |
| 3 | 5 | SW | 9 | 17.3 | |
| 3 | 4 | SSW | 12 | 17.1 | |
| 4 | 5 | W | 14 | 16.9 | |
| 4 | 5 | SSE | 13 | 16.8 | |
| 8 | 6 | S | 19 | 16.0 | |
| 7 | 6 | S | 23 | 15.7 | |
| 9 | 6 | SW | 21 | 15.9 | |
| 9 | 6 | SW | 21 | 15.9 | |
| 9 | 6 | SW | 21 | 15.7 | |
| 9 | 7 | WSW | 17 | 15.5 | |
| 9 | 7 | WSW | 19 | 15.4 | |
| 9 | 6 | W | 19 | 15.1 |