St Mary's Sound wave
buoy monthly averages for 2025 last observation shown
oldest observation available
Average Wave Height
4 ft
0.1 — 17.6 ft
Average Wave period
5 secs
3 — 9 secs
Average Wave Direction
SSW
Average Water temperature
13 °C
10.4 — 19.2 °C
| Month | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 1.0 | 5.2 | N | 15.7 | |
| 2.3 | 4.8 | W | 15.9 | |
| 2.8 | 4.7 | WSW | 14.5 | |
| 2.5 | 4.3 | SSE | 13.4 | |
| 4.0 | 4.8 | SSE | 11.6 | |
| 3.8 | 4.9 | SSW | 10.9 | |
| 6.1 | 5.4 | S | 10.7 | |
| 6.2 | 5.7 | SSW | 11.3 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.