St Mary's Sound wave buoy daily averages for Aug 2025 last observation shown oldest observation available Monthly averages for
Average Wave Height
3 ft
0.1 — 10.3 ft
Average Wave period
5 secs
3 — 8 secs
Average Wave Direction
WSW
Average Water temperature
17 °C
14.2 — 19.4 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 6.4 | 5.4 | SW | 16.1 | |
| 5.5 | 5.1 | SW | 16.4 | |
| 4.0 | 5.3 | WSW | 16.2 | |
| 4.5 | 5.2 | WSW | 16.2 | |
| 4.8 | 5.3 | WSW | 16.3 | |
| 4.6 | 5.5 | WSW | 16.6 | |
| 2.7 | 4.5 | SW | 17.2 | |
| 1.7 | 3.6 | S | 16.8 | |
| 1.3 | 5.7 | WSW | 16.9 | |
| 1.4 | 5.2 | WNW | 16.6 | |
| 1.6 | 4 | E | 17.6 | |
| 1.8 | 4 | ESE | 18.3 | |
| 2.4 | 4.1 | ESE | 18.4 | |
| 5.7 | 4.4 | E | 18.5 | |
| 7.6 | 5.1 | E | 18.0 | |
| 6.5 | 4.8 | ESE | 18.1 | |
| 2.0 | 3.8 | SSE | 17.7 | |
| 2.3 | 4.5 | WSW | 16.6 | |
| 2.2 | 4.3 | SW | 16.6 | |
| 2.6 | 4.5 | S | 15.9 | |
| 3.2 | 3.9 | ESE | 16.4 | |
| 1.9 | 4.7 | NW | 16.7 | |
| 2.1 | 4.8 | NNW | 16.0 | |
| 2.0 | 4.9 | WNW | 16.4 | |
| 3.3 | 4.3 | SW | 16.1 | |
| 1.9 | 4.8 | WNW | 16.9 | |
| 2.3 | 4.4 | NNW | 16.6 | |
| 3.1 | 4.1 | W | 16.1 | |
| 1.4 | 3.4 | WNW | 16.3 | |
| 0.8 | 4.9 | NNW | 16.0 | |
| 1.3 | 4.9 | NNW | 15.8 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.