M3 wave buoy daily averages for Nov 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
16 ft
7.9 — 31.2 ft
Average Wave period
8 secs
6 — 11 secs
Average Water temperature
12 °C
12.3 — 12.6 °C
Average Wind
W, 22 mph
12 — 31 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) |
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| 17 | 8 | WSW | 26 | 12.6 | |
| 23 | 10 | W | 21 | 12.5 | |
| 14 | 8 | NW | 20 | 12.4 | |
| 10 | 7 | WSW | 20 | 12.4 |