M5 wave buoy daily averages for Nov 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
9 ft
4.9 — 13.8 ft
Average Wave period
6 secs
5 — 7 secs
Average Water temperature
12 °C
12.3 — 12.7 °C
Average Wind
W, 23 mph
7 — 33 mph
Chart showing grouped wave observations for M5. Use the table on this page for a text version of the same measurements.
About M5 wave buoy
M5 is an offshore data buoy in the Atlantic approaches (51.4100°N, 6.4200°W). It is positioned to monitor swell and storm waves moving toward Ireland and the UK, supporting marine warnings. It typically reports waves (height/period/direction) and basic meteorology.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
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| 9 | 6 | WSW | 27 | 12.6 | |
| 12 | 7 | WSW | 25 | 12.4 | |
| 8 | 6 | NW | 20 | 12.4 | |
| 7 | 6 | WSW | 21 | 12.3 |