M3 wave buoy monthly averages for 2025 last observation shown Data available: to
Average Wave Height
9 ft
1.6 — 16.4 ft
Average Wave period
7 secs
4 — 11 secs
Average Water temperature
14 °C
11.1 — 18.4 °C
Average Wind
SW, 17 mph
0 — 45 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.
| Month | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 11 | 7 | S | 20 | 11.5 | |
| 12 | 8 | S | 20 | 11.5 | |
| 9 | 7 | ESE | 18 | 11.5 | |
| 8 | 6 | SE | 17 | 12.0 | |
| 6 | 6 | NNW | 13 | 14.7 | |
| 7 | 6 | WSW | 15 | 15.5 | |
| 6 | 6 | WNW | 15 | 16.7 | |
| 7 | 6 | SW | 14 | 17.3 | |
| 10 | 7 | WSW | 17 | 15.6 | |
| 9 | 6 | WSW | 18 | 14.3 | |
| 12 | 7 | W | 21 | 12.4 | |
| 10 | 7 | ENE | 18 | 11.9 |