M5 wave buoy monthly averages for 2026 last observation shown Data available: to
Average Wave Height
5 ft
2.3 — 6.6 ft
Average Wave period
4 secs
4 — 5 secs
Average Water temperature
11 °C
10.8 — 11.4 °C
Average Wind
NNW, 19 mph
12 — 24 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.
| Month | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
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| 5 | 4 | NNW | 19 | 11.1 | |
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