St Mary's Sound wave buoy daily averages for Nov 2016 last observation shown oldest observation available Monthly averages for
Average Wave Height
 4 ft 
 1.4 — 11.2 ft
   Average Wave period
 8 secs 
 4 — 15 secs
   Average Wave Direction
 S 
  Average Water temperature
 13 °C 
 12.1 — 13.9 °C
   | Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) | 
|---|---|---|---|---|
| 3.7 | 5.8 | ESE | 12.2 | |
| 5.8 | 7.6 | ESE | 12.3 | |
| 6.9 | 7.5 | ESE | 12.3 | |
| 5.4 | 6.7 | ESE | 12.4 | |
| 5.1 | 7.2 | ESE | 12.4 | |
| 6.7 | 8.7 | ESE | 12.4 | |
| 7.3 | 8.4 | E | 12.5 | |
| 2.4 | 7.1 | E | 12.6 | |
| 3.3 | 10.1 | NNW | 12.5 | |
| 5.7 | 7.4 | E | 12.6 | |
| 8.1 | 9.9 | S | 12.7 | |
| 4.5 | 8.9 | SSW | 12.8 | |
| 5.0 | 8.8 | W | 12.9 | |
| 4.7 | 7.3 | WSW | 13.1 | |
| 3.3 | 7.5 | WSW | 13.2 | |
| 2.4 | 10.3 | WNW | 13.2 | |
| 2.2 | 10.3 | W | 13.2 | |
| 2.6 | 9.6 | W | 13.2 | |
| 3.7 | 6.8 | SSW | 13.2 | |
| 3.7 | 8.4 | W | 13.2 | |
| 4.3 | 9.3 | W | 13.2 | |
| 4.7 | 9.3 | W | 13.2 | |
| 3.1 | 7.3 | SSW | 13.4 | |
| 2.4 | 6.3 | E | 13.5 | |
| 2.7 | 7.4 | NNE | 13.5 | |
| 2.4 | 7.5 | NNW | 13.6 | |
| 1.8 | 7 | SW | 13.7 | |
| 1.8 | 6.5 | SE | 13.7 | |
| 2.1 | 5.5 | E | 13.8 | |
| 2.0 | 8.3 | SSW | 13.8 | 
 Realtime data displayed on this page is from the Regional
                Coastal Monitoring Programme.