St Mary's Sound wave buoy daily averages for Oct 2016 last observation shown oldest observation available Monthly averages for
Average Wave Height
 4 ft 
 0.4 — 13.2 ft
   Average Wave period
 8 secs 
 3 — 17 secs
   Average Wave Direction
 S 
  Average Water temperature
 14 °C 
 10.2 — 16.8 °C
   | Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) | 
|---|---|---|---|---|
| 3.3 | 8.4 | ESE | 13.8 | |
| 2.9 | 6.1 | ESE | 13.8 | |
| 2.7 | 7.6 | S | 13.9 | |
| 1.8 | 10 | NW | 13.9 | |
| 2.2 | 9.3 | WSW | 13.9 | |
| 2.3 | 7.7 | SW | 13.9 | |
| 3.3 | 7.7 | SSW | 13.9 | |
| 5.1 | 8 | SSE | 13.9 | |
| 9.8 | 7.7 | ESE | 14.0 | |
| 4.1 | 6 | ESE | 14.0 | |
| 1.3 | 12.8 | NW | 13.0 | |
| 1.4 | 12.9 | WNW | 13.4 | |
| 2.2 | 10.4 | SW | 14.0 | |
| 2.9 | 7.2 | W | 14.0 | |
| 3.9 | 7.4 | SW | 14.1 | |
| 6.8 | 7.8 | SSW | 14.2 | |
| 4.8 | 7 | SSW | 14.3 | |
| 3.7 | 5.3 | SSE | 14.4 | |
| 4.4 | 7.1 | ESE | 14.6 | |
| 6.6 | 7.1 | SE | 14.7 | |
| 5.6 | 5.7 | ESE | 15.1 | |
| 2.0 | 8.5 | N | 15.2 | |
| 1.8 | 10.3 | NW | 15.0 | |
| 2.2 | 10.7 | NW | 14.4 | |
| 3.9 | 7.8 | ESE | 14.1 | |
| 6.8 | 6.7 | ESE | 14.2 | |
| 5.8 | 6.5 | ESE | 14.3 | |
| 7.7 | 6.8 | SE | 14.4 | |
| 5.6 | 6.2 | SSW | 14.5 | |
| 2.8 | 8.6 | WNW | 14.7 | |
| 3.6 | 7.5 | W | 14.5 | 
 Realtime data displayed on this page is from the Regional
                Coastal Monitoring Programme.