St Mary's Sound wave
buoy daily averages for Dec 2024 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
5 ft
2.2 — 9.8 ft
Average Wave period
5 secs
4.1 — 6.7 secs
Average Wave Direction
SW
Average Water temperature
12 °C
11.9 — 12.9 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 5.2 | 4.9 | NW | 11.9 | |
| 4.9 | 5 | W | 12.0 | |
| 4.4 | 5.3 | SW | 12.0 | |
| 5.1 | 5.7 | SW | 12.0 | |
| 9.8 | 6.7 | SSW | 12.2 | |
| 8.5 | 5.6 | SSW | 12.2 | |
| 2.5 | 4.1 | W | 12.1 | |
| 2.4 | 4.3 | WNW | 12.1 | |
| 2.2 | 4.3 | W | 12.1 | |
| 2.9 | 4.7 | SSE | 12.2 | |
| 4.9 | 4.7 | ESE | 12.2 | |
| 5.0 | 5 | ESE | 12.2 | |
| 5.9 | 5.2 | ESE | 12.3 | |
| 4.8 | 4.8 | E | 12.4 | |
| 5.3 | 4.8 | ENE | 12.4 | |
| 6.6 | 5.1 | WNW | 12.6 | |
| 5.9 | 5.3 | WSW | 12.8 | |
| 6.1 | 5.4 | SW | 12.8 | |
| 5.2 | 4.8 | SW | 12.8 | |
| 2.6 | 4.7 | SW | 12.8 | |
| 3.9 | 5.5 | WSW | 12.8 | |
| 5.5 | 5.3 | SSW | 12.9 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.