St Mary's Sound wave
buoy daily averages for Aug 2025 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
1 ft
0.1 — 2.3 ft
Average Wave period
4 secs
3 — 7 secs
Average Wave Direction
NW
Average Water temperature
16 °C
14.2 — 17.2 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 1.0 | 3.5 | W | 16.0 | |
| 0.8 | 4.9 | NNW | 16.0 | |
| 1.3 | 4.9 | NNW | 15.8 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.