M5 wave buoy daily averages for Aug 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
4 ft
1.6 — 9.2 ft
Average Wave period
5 secs
3 — 8 secs
Average Water temperature
17 °C
15.7 — 19 °C
Average Wind
WSW, 16 mph
0 — 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) |
|---|---|---|---|---|---|
| 3 | 4 | NNW | 16 | 16.8 | |
| 2 | 4 | WNW | 13 | 16.6 | |
| 3 | 4 | WSW | 17 | 17.5 | |
| 6 | 5 | W | 23 | 17.2 | |
| 5 | 5 | WNW | 19 | 16.3 | |
| 3 | 5 | SW | 12 | 16.4 | |
| 6 | 5 | WSW | 20 | 17.0 | |
| 4 | 5 | WSW | 18 | 16.6 | |
| 5 | 5 | WSW | 20 | 16.4 | |
| 3 | 4 | SSW | 12 | 17.1 | |
| 3 | 5 | E | 11 | 17.3 | |
| 3 | 5 | E | 10 | 17.4 | |
| 3 | 5 | SSW | 11 | 17.9 | |
| 3 | 5 | WSW | 13 | 17.8 | |
| 2 | 4 | NNE | 15 | 17.7 | |
| 3 | 4 | ENE | 19 | 17.6 | |
| 4 | 5 | E | 18 | 17.8 | |
| 4 | 4 | E | 17 | 17.6 | |
| 3 | 4 | NE | 15 | 17.5 | |
| 3 | 4 | NE | 18 | 17.8 | |
| 2 | 4 | NNE | 11 | 17.8 | |
| 2 | 6 | W | 8 | 18.1 | |
| 2 | 6 | SSW | 7 | 18.5 | |
| 2 | 4 | S | 13 | 18.6 | |
| 5 | 5 | S | 18 | 18.5 | |
| - | - | - | - | - | |
| 8 | 6 | WSW | 23 | 18.2 | |
| 7 | 6 | WSW | 22 | 17.8 | |
| 6 | 5 | W | 20 | 17.6 | |
| 5 | 5 | SW | 21 | 17.5 | |
| - | - | - | - | - |