St Mary's Sound wave buoy monthly averages for 2020 last observation shown oldest observation available
Average Wave Height
4 ft
0.6 — 24.2 ft
Average Wave period
7 secs
0 — 29 secs
Average Wave Direction
SW
Average Water temperature
12 °C
10 — 17.8 °C
| Month | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 5.4 | 5.1 | SW | 11.5 | |
| 5.1 | 3.6 | SSW | 12.6 | |
| 6.5 | 0 | SW | 13.2 | |
| 2.3 | 7.9 | W | 15.1 | |
| 3.1 | 7.5 | WSW | 15.6 | |
| 2.4 | 7.7 | WSW | 14.5 | |
| 2.8 | 7.4 | WSW | 13.3 | |
| 3.1 | 8.6 | SSW | 12.0 | |
| 3.2 | 9.2 | S | 10.4 | |
| 5.3 | 9.5 | SSW | 9.8 | |
| 7.2 | 9.8 | SW | 10.2 | |
| 5.9 | 9.3 | SSW | 10.6 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.