St Mary's Sound wave buoy monthly averages for 2021 last observation shown oldest observation available
Average Wave Height
4 ft
0.7 — 16.7 ft
Average Wave period
5 secs
3 — 9 secs
Average Wave Direction
SW
Average Water temperature
13 °C
10 — 19.8 °C
| Month | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 5.7 | 5.2 | SSW | 11.9 | |
| 3.0 | 4.9 | W | 13.2 | |
| 4.3 | 5 | SW | 14.4 | |
| 2.8 | 4.8 | SW | 15.8 | |
| 2.5 | 4.3 | SW | 15.5 | |
| 2.5 | 4.4 | SW | 15.3 | |
| 2.2 | 4.6 | WNW | 13.2 | |
| 4.2 | 5 | SW | 11.2 | |
| 3.2 | 4.4 | ESE | 10.5 | |
| 3.9 | 5 | WSW | 10.2 | |
| 8.2 | 6 | SSW | 10.0 | |
| 4.7 | 5.2 | SSW | 10.3 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.