M3 wave buoy daily averages for Sep 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
10 ft
3 — 16.7 ft
Average Wave period
7 secs
5 — 8 secs
Average Water temperature
16 °C
14.7 — 16.7 °C
Average Wind
WSW, 17 mph
2 — 38 mph
Chart showing grouped wave observations for M3. Use the table on this page for a text version of the same measurements.
About M3 wave buoy
M3 is an offshore data buoy in the Atlantic approaches (51.1300°N, 10.3300°W). It provides upstream observations of swell and storm conditions relevant to Ireland/UK marine forecasts. It typically measures wave height/period/direction plus basic meteorological variables.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 14 | 8 | W | 18 | 16.2 | |
| 8 | 7 | WSW | 11 | 16.2 | |
| 9 | 7 | WNW | 15 | 16.3 | |
| 9 | 7 | WNW | 17 | 16.5 | |
| 7 | 6 | SSW | 13 | 16.5 | |
| 10 | 6 | SSE | 23 | 16.4 | |
| 13 | 8 | WNW | 18 | 16.4 | |
| 11 | 7 | WSW | 18 | 16.3 | |
| 11 | 7 | WSW | 16 | 16.3 | |
| 12 | 7 | W | 23 | 16.1 | |
| 15 | 7 | W | 25 | 16.0 | |
| 14 | 7 | W | 22 | 15.8 | |
| 14 | 8 | W | 17 | 15.6 | |
| 11 | 7 | SW | 24 | 15.6 | |
| 16 | 8 | WNW | 22 | 15.2 | |
| 11 | 7 | SW | 19 | 15.1 | |
| 14 | 8 | WSW | 18 | 15.2 | |
| 11 | 7 | SSW | 18 | 15.2 | |
| 8 | 7 | W | 8 | 15.2 | |
| 8 | 7 | NW | 14 | 15.2 | |
| 8 | 6 | N | 18 | 15.1 | |
| 5 | 6 | E | 7 | 15.1 | |
| 4 | 6 | S | 13 | 15.0 | |
| 6 | 6 | S | 16 | 15.0 | |
| 6 | 5 | S | 18 | 14.9 | |
| 9 | 6 | S | 22 | 14.9 | |
| 10 | 7 | WNW | 14 | 14.9 | |
| 7 | 7 | W | 10 | 14.9 | |
| 6 | 6 | SSW | 15 | 15.0 | |
| 10 | 7 | SSW | 19 | 15.1 |