St Mary's Sound wave
buoy daily averages for Sep 2017 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
4 ft
1.4 — 7.3 ft
Average Wave period
8 secs
6 — 10.1 secs
Average Wave Direction
WSW
Average Water temperature
15 °C
14.3 — 16.3 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 5.0 | 8 | SW | 14.4 | |
| 4.6 | 8.5 | WSW | 14.4 | |
| 4.3 | 6.8 | SSW | 14.4 | |
| 6.6 | 7 | SSW | 14.3 | |
| 2.8 | 6.7 | SW | 14.3 | |
| 3.3 | 9.5 | WSW | 14.4 | |
| 4.5 | 9.6 | WSW | 14.3 | |
| 5.3 | 6.8 | SSW | 14.3 | |
| 4.5 | 6.6 | SW | 14.3 | |
| 4.1 | 7 | SSW | 14.4 | |
| 4.6 | 6 | SSW | 14.5 | |
| 1.7 | 7.7 | SW | 14.6 | |
| 1.4 | 9.5 | W | 14.7 | |
| 1.5 | 7.9 | NNW | 14.8 | |
| 2.0 | 6.8 | NNW | 15.0 | |
| 2.5 | 9.3 | WNW | 15.1 | |
| 3.8 | 10.1 | WNW | 14.9 | |
| 5.1 | 8.4 | WSW | 14.7 | |
| 4.8 | 7.8 | WSW | 14.9 | |
| 4.5 | 8.4 | WNW | 14.7 | |
| 3.8 | 7.7 | WNW | 14.9 | |
| 3.3 | 8.5 | NW | 14.9 | |
| 3.3 | 7.2 | W | 14.8 | |
| 2.6 | 7.6 | W | 15.2 | |
| 2.7 | 9.1 | WNW | 15.3 | |
| 7.3 | 7.6 | SSW | 15.5 | |
| 2.4 | 6.5 | WSW | 16.2 | |
| 1.4 | 8.7 | NW | 16.3 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.