St Mary's Sound wave buoy monthly averages for 2018 last observation shown oldest observation available
Average Wave Height
4 ft
0.6 — 19.3 ft
Average Wave period
9 secs
2 — 25 secs
Average Wave Direction
SW
Average Water temperature
12 °C
8.7 — 20.9 °C
| Month | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 6.1 | 9.6 | SW | 11.8 | |
| 6.9 | 8.9 | S | 12.7 | |
| 4.0 | 9.7 | SSW | 13.7 | |
| 3.1 | 8.3 | WSW | 14.8 | |
| 2.3 | 7.8 | W | 15.9 | |
| 2.0 | 9.1 | WSW | 16.1 | |
| 2.3 | 7.5 | SSE | 14.0 | |
| 2.6 | 9.2 | NW | 11.3 | |
| 4.9 | 9.5 | SW | 10.0 | |
| 5.9 | 9.5 | SSW | 9.1 | |
| 5.2 | 8.6 | S | 9.7 | |
| 6.3 | 9.2 | SW | 10.6 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.