St Mary's Sound wave
buoy daily averages for Mar 2018 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
6 ft
1.5 — 19 ft
Average Wave period
10 secs
4 — 15 secs
Average Wave Direction
SSW
Average Water temperature
9 °C
8.7 — 9.4 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 3.4 | 9.4 | WSW | 9.3 | |
| 4.0 | 10.3 | WSW | 9.3 | |
| 4.6 | 8 | SW | 9.2 | |
| 3.7 | 9 | WSW | 9.2 | |
| 4.0 | 7 | SW | 9.2 | |
| 3.2 | 8.5 | WSW | 9.2 | |
| 2.8 | 11.6 | WNW | 9.1 | |
| 5.6 | 10 | WSW | 9.1 | |
| 7.0 | 8.4 | SW | 9.1 | |
| 4.7 | 9.8 | SW | 9.1 | |
| 2.2 | 12 | WSW | 9.1 | |
| 4.6 | 8.7 | ESE | 9.1 | |
| 6.2 | 8 | E | 9.1 | |
| 4.7 | 7.8 | E | 9.2 | |
| 5.5 | 8.5 | SSE | 9.3 | |
| 6.1 | 10.3 | SW | 9.3 | |
| 9.6 | 11.1 | SSW | 9.3 | |
| 13.5 | 9.6 | SSW | 9.2 | |
| 4.5 | 9 | SW | 9.2 | |
| 6.5 | 11.1 | SW | 9.2 | |
| 9.8 | 12 | SSW | 9.1 | |
| 8.7 | 9.8 | SSW | 9.1 | |
| 5.9 | 7.5 | S | 9.1 | |
| 4.8 | 7.9 | SW | 9.0 | |
| 4.2 | 9.4 | SW | 9.1 | |
| 4.1 | 9.7 | SSW | 9.1 | |
| 5.0 | 8.9 | SSW | 9.0 | |
| 9.0 | 10.7 | SSW | 9.0 | |
| 4.0 | 10.9 | SSW | 8.9 | |
| 11.3 | 10.5 | ESE | 8.9 | |
| 10.8 | 10.3 | ESE | 8.9 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.