St Mary's Sound wave
buoy daily averages for Apr 2023 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
4 ft
1.8 — 11.6 ft
Average Wave period
5 secs
3 — 7 secs
Average Wave Direction
SSW
Average Water temperature
11 °C
10.6 — 11.6 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 2.2 | 5.2 | W | 11.2 | |
| 2.4 | 4.6 | SW | 11.3 | |
| 3.4 | 5.1 | SW | 11.1 | |
| 3.8 | 4.1 | S | 11.0 | |
| 4.8 | 4.9 | SSE | 10.9 | |
| 4.6 | 4.3 | SE | 10.9 | |
| 3.0 | 5 | SW | 10.9 | |
| 3.5 | 5.3 | SW | 10.8 | |
| 3.5 | 4.6 | SSE | 10.8 | |
| 3.7 | 4.2 | ESE | 10.8 | |
| 7.3 | 5.3 | ESE | 10.8 | |
| 5.0 | 4.8 | ESE | 10.9 | |
| 4.3 | 4.6 | ESE | 10.9 | |
| 2.8 | 4.9 | W | 11.0 | |
| 2.8 | 4.5 | W | 10.9 | |
| 3.8 | 5.9 | WSW | 10.9 | |
| 4.7 | 5.3 | SW | 10.8 | |
| 4.7 | 5.4 | WSW | 10.8 | |
| 7.4 | 5.4 | WSW | 10.8 | |
| 6.4 | 5.2 | SW | 10.9 | |
| 4.6 | 4.9 | SW | 10.9 | |
| 4.7 | 4.6 | S | 10.9 | |
| 3.4 | 5.3 | W | 10.8 | |
| 2.6 | 4.5 | W | 10.9 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.