St Mary's Sound wave
buoy daily averages for Aug 2023 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
3 ft
0.1 — 14.1 ft
Average Wave period
5 secs
3 — 7 secs
Average Wave Direction
WSW
Average Water temperature
16 °C
14.9 — 19.2 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 2.4 | 4.1 | SW | 15.5 | |
| 1.8 | 4.5 | WNW | 15.9 | |
| 1.6 | 4.4 | W | 15.8 | |
| 1.7 | 4.5 | NW | 16.7 | |
| 1.9 | 3.9 | NW | 16.4 | |
| 1.7 | 4 | NW | 16.3 | |
| 1.4 | 3.8 | WNW | 16.3 | |
| 1.0 | 3.8 | WSW | 16.3 | |
| 1.4 | 4.4 | W | 15.9 | |
| 2.1 | 4.8 | WNW | 15.8 | |
| 2.7 | 4.6 | WNW | 15.6 | |
| 3.6 | 5.3 | SW | 15.8 | |
| 7.9 | 6.5 | SSW | 15.4 | |
| 6.5 | 4.8 | SSE | 15.4 | |
| 1.4 | 3.5 | SSW | 16.0 | |
| 1.1 | 5.5 | SSW | 16.0 | |
| 1.9 | 5 | SSW | 16.4 | |
| 4.0 | 5 | SW | 16.0 | |
| 4.2 | 4.8 | WNW | 16.2 | |
| 4.4 | 5 | W | 15.7 | |
| 3.9 | 4.8 | SW | 15.4 | |
| 3.0 | 3.9 | S | 15.3 | |
| 1.7 | 3.8 | WSW | 15.3 | |
| 2.6 | 4.1 | W | 15.0 | |
| 1.7 | 4.3 | WSW | 15.3 | |
| 2.4 | 5 | NW | 15.3 | |
| 4.9 | 5 | W | 15.1 | |
| 2.7 | 5 | NNW | 15.6 | |
| 3.9 | 5.4 | WNW | 15.7 | |
| 6.8 | 5.9 | WSW | 15.4 | |
| 4.0 | 5 | SW | 16.0 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.