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 | 10 | SW | 11.8 | |
| 7 | 9 | S | 12.7 | |
| 4 | 10 | SSW | 13.7 | |
| 3 | 8 | WSW | 14.8 | |
| 2 | 8 | W | 15.9 | |
| 2 | 9 | WSW | 16.1 | |
| 2 | 8 | SSE | 14.0 | |
| 3 | 9 | NW | 11.3 | |
| 5 | 10 | SW | 10.0 | |
| 6 | 10 | SSW | 9.1 | |
| 5 | 9 | S | 9.7 | |
| 6 | 9 | SW | 10.6 |
Realtime data displayed on this page is from the
Regional Coastal Monitoring Programme
.