St Mary's Sound wave
buoy daily averages for Jun 2025 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
3 ft
1.2 — 9.3 ft
Average Wave period
5 secs
3 — 6 secs
Average Wave Direction
WSW
Average Water temperature
14 °C
13.5 — 15.4 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 2.1 | 4.5 | WSW | 14.3 | |
| 3.2 | 4.9 | SW | 14.2 | |
| 5.5 | 5.4 | SSW | 14.0 | |
| 3.6 | 4.3 | SSE | 14.1 | |
| 2.8 | 4 | ESE | 14.3 | |
| 1.8 | 4.4 | WNW | 14.0 | |
| 2.0 | 4.4 | W | 14.0 | |
| 2.8 | 5 | W | 14.2 | |
| 3.8 | 4.9 | SW | 14.0 | |
| 3.5 | 4.9 | SW | 14.1 | |
| 3.3 | 4.5 | SW | 13.9 | |
| 3.1 | 4.8 | WSW | 14.0 | |
| 4.7 | 5 | WSW | 13.8 | |
| 3.2 | 5.1 | WNW | 14.1 | |
| 3.2 | 5 | WNW | 13.7 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.