M4 wave buoy daily averages for Sep 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
10 ft
4.3 — 26.6 ft
Average Wave period
7 secs
5 — 10 secs
Average Water temperature
14 °C
13.7 — 15.1 °C
Average Wind
SW, 20 mph
2 — 38 mph
Chart showing grouped wave observations for M4. Use the table on this page for a text version of the same measurements.
Sorry, there is no wave data for Mon, Sep 1, 2025
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) |
|---|---|---|---|---|---|
| 13 | 7 | W | 22 | 14.8 | |
| 7 | 6 | SW | 15 | 14.8 | |
| 6 | 7 | NW | 11 | 14.9 | |
| 7 | 6 | W | 15 | 15.0 | |
| 9 | 6 | SW | 19 | 14.9 | |
| 9 | 6 | SE | 21 | 14.9 | |
| 12 | 7 | SSW | 23 | 14.9 | |
| 12 | 7 | SSW | 21 | 14.9 | |
| 10 | 7 | SE | 16 | 14.9 | |
| 9 | 6 | SW | 21 | 14.9 | |
| 13 | 7 | W | 26 | 14.7 | |
| 15 | 8 | WSW | 24 | 14.6 | |
| 12 | 7 | WSW | 20 | 14.5 | |
| 9 | 6 | S | 23 | 14.4 | |
| 16 | 8 | W | 29 | 14.3 | |
| 11 | 7 | WSW | 18 | 14.4 | |
| 16 | 7 | SSW | 33 | 14.3 | |
| 13 | 7 | SSW | 22 | 14.1 | |
| 11 | 7 | SW | 22 | 14.1 | |
| 12 | 7 | N | 24 | 14.1 | |
| 11 | 7 | N | 19 | 14.0 | |
| 7 | 8 | WSW | 8 | 14.1 | |
| 8 | 7 | S | 17 | 14.0 | |
| 10 | 7 | S | 20 | 13.9 | |
| 8 | 6 | S | 21 | 14.0 | |
| 12 | 7 | SSE | 28 | 13.8 | |
| 11 | 8 | WSW | 16 | 13.8 | |
| 7 | 7 | SSW | 9 | 13.9 | |
| 8 | 5 | S | 23 | 14.1 | |
| 10 | 7 | SSW | 18 | 14.1 |