St Mary's Sound wave
buoy daily averages for Jan 2023 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
6 ft
0.3 — 13.5 ft
Average Wave period
6 secs
4 — 9 secs
Average Wave Direction
SW
Average Water temperature
11 °C
10 — 11.5 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 0.4 | 5.6 | NNW | 10.4 | |
| 2.2 | 5.5 | N | 10.5 | |
| 4.0 | 4.2 | S | 10.8 | |
| 3.6 | 5.4 | WSW | 10.8 | |
| 3.3 | 5.4 | W | 10.8 | |
| 4.4 | 5.3 | WNW | 10.9 | |
| 4.8 | 5.5 | W | 11.0 | |
| 5.5 | 6.2 | WSW | 11.1 | |
| 6.9 | 5.5 | SW | 11.2 | |
| 8.8 | 6.2 | SW | 11.3 | |
| 6.6 | 5.6 | SW | 11.3 | |
| 8.5 | 6.1 | SW | 11.4 | |
| 8.1 | 6 | SW | 11.4 | |
| 8.2 | 5.8 | SSW | 11.4 | |
| 5.7 | 5.5 | WSW | 11.3 | |
| 8.6 | 6.2 | SW | 11.4 | |
| 10.9 | 6.7 | SSW | 11.5 | |
| 7.5 | 5.6 | SW | 11.5 | |
| 6.2 | 5.4 | SW | 11.5 | |
| 7.1 | 5.8 | SW | 11.4 | |
| 8.9 | 6 | SSW | 11.4 | |
| 5.1 | 6.1 | SW | 11.4 | |
| 9.8 | 6.8 | SSW | 11.4 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.