M4 wave buoy daily averages for Sep 2024 last observation shown Data available: to Monthly averages for
Average Wave Height
8 ft
2.3 — 13.8 ft
Average Wave period
6 secs
4 — 11 secs
Average Water temperature
14 °C
13.5 — 15 °C
Average Wind
N, 16 mph
2 — 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) |
|---|---|---|---|---|---|
| 5 | 5 | SE | 15 | 14.1 | |
| 8 | 7 | WNW | 14 | 14.2 | |
| 8 | 7 | WNW | 18 | 14.1 | |
| 10 | 6 | NNW | 19 | 14.0 | |
| 5 | 6 | NNE | 13 | 14.2 | |
| 5 | 5 | NNE | 18 | 14.1 | |
| 6 | 5 | NNE | 16 | 14.2 | |
| 6 | 5 | NNW | 18 | 14.1 | |
| 9 | 6 | W | 21 | 14.1 | |
| 13 | 7 | NW | 26 | 14.0 | |
| 13 | 7 | NW | 20 | 14.0 | |
| 12 | 8 | NNW | 13 | 14.0 | |
| 10 | 7 | SSW | 19 | 13.9 | |
| 12 | 7 | SW | 24 | 13.7 | |
| 10 | 7 | WSW | 13 | 13.7 | |
| 7 | 6 | S | 16 | 13.8 | |
| 9 | 9 | S | 10 | 14.1 | |
| 7 | 8 | ESE | 7 | 14.4 | |
| 7 | 8 | ENE | 7 | 14.5 | |
| 3 | 6 | NE | 8 | 14.3 | |
| 4 | 5 | ENE | 12 | 14.4 | |
| 3 | 4 | NNE | 13 | 14.3 | |
| 3 | 5 | NNW | 12 | 14.1 | |
| 8 | 6 | N | 17 | 14.1 | |
| 6 | 5 | NE | 17 | 14.0 | |
| 10 | 6 | NNE | 25 | 13.8 | |
| 11 | 6 | NNW | 20 | 13.9 | |
| 6 | 5 | WSW | 16 | 13.8 | |
| 9 | 6 | ESE | 20 | 13.7 | |
| 7 | 7 | N | 13 | 13.6 |