St Mary's Sound wave buoy daily averages for Sep 2025 last observation shown oldest observation available Monthly averages for
Average Wave Height
4 ft
1.2 — 10.2 ft
Average Wave period
5 secs
3 — 8 secs
Average Wave Direction
WSW
Average Water temperature
15 °C
14.5 — 17.7 °C
| Day | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 1.9 | 4.5 | WNW | 14.6 | |
| 1.8 | 6.3 | WSW | 14.7 | |
| 2.4 | 6.1 | SSW | 14.7 | |
| 4.2 | 4.6 | S | 14.6 | |
| 1.7 | 4.3 | WNW | 14.8 | |
| 1.9 | 4.8 | W | 14.8 | |
| 1.9 | 4.9 | WNW | 14.9 | |
| 1.9 | 4.5 | ESE | 15.0 | |
| 3.4 | 4.6 | E | 15.0 | |
| 3.5 | 4.8 | NE | 15.2 | |
| 3.1 | 4.9 | WSW | 15.1 | |
| 3.7 | 4.4 | WSW | 15.3 | |
| 4.8 | 4.8 | WSW | 15.4 | |
| 6.2 | 5.1 | SW | 15.4 | |
| 3.9 | 5.1 | NW | 15.5 | |
| 6.3 | 5.5 | WSW | 14.9 | |
| 6.3 | 5.3 | SW | 15.1 | |
| 4.3 | 5.3 | WSW | 14.9 | |
| 4.4 | 5.2 | WSW | 14.9 | |
| 4.6 | 5.3 | W | 14.9 | |
| 4.5 | 5.3 | SW | 15.0 | |
| 5.8 | 5.1 | SSW | 15.3 | |
| 4.3 | 5.5 | SW | 15.6 | |
| 6.6 | 6.1 | SSW | 15.6 | |
| 5.2 | 4.5 | S | 16.6 | |
| 3.3 | 5 | WSW | 16.8 | |
| 5.9 | 6.1 | SW | 16.7 | |
| 7.2 | 6.3 | SSW | 16.7 | |
| 4.9 | 5.2 | SW | 16.9 | |
| 4.5 | 5.1 | W | 16.4 |
Realtime data displayed on this page is from the Regional
Coastal Monitoring Programme.