M4 wave buoy monthly averages for 2023 last observation shown Data available: to
Average Wave Height
8 ft
2 — 15.7 ft
Average Wave period
6 secs
3 — 11 secs
Average Water temperature
14 °C
10.6 — 18.3 °C
Average Wind
SW, 16 mph
0 — 43 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.
| Month | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| - | - | - | - | - | |
| - | - | - | - | - | |
| - | - | - | - | - | |
| 6 | 7 | SSW | 12 | 11.0 | |
| 8 | 7 | WSW | 15 | 12.1 | |
| 5 | 5 | SE | 14 | 15.5 | |
| 7 | 6 | W | 17 | 15.2 | |
| 7 | 6 | WSW | 16 | 15.5 | |
| 9 | 7 | SW | 15 | 15.3 | |
| 10 | 7 | SSE | 19 | 13.9 | |
| 11 | 7 | W | 18 | 12.1 | |
| 10 | 7 | NW | 19 | 11.2 |