St Mary's Sound wave buoy monthly averages for 2023 last observation shown Data available: to
Average Wave Height
4 ft
0.1 — 7.5 ft
Average Wave period
5 secs
3 — 9 secs
Average Wave Direction
SW
Average Water temperature
14 °C
10 — 19.2 °C
Chart showing grouped wave observations for St Mary's Sound. Use the table on this page for a text version of the same measurements.
About St Mary's Sound wave buoy
St Mary's Sound (CCO station 113) is an inshore coastal wave monitoring site at 49.8912°N, 6.3125°W. It’s part of the UK’s regional Coastal Monitoring / Channel Coastal Observatory network, placed to characterise nearshore wave climate for flood risk, erosion studies, coastal engineering and local forecasting. These stations commonly use a directional wave buoy (often a Datawell Directional WaveRider class) and report significant wave height, wave period (peak/mean) and wave direction; many also report sea temperature and, where fitted, nearby meteorology.
| Month | Wave height (ft) | Wave Period (s) | Wave Direction | Water Temp (°C) |
|---|---|---|---|---|
| 5 | 6 | SW | 11.1 | |
| - | - | - | - | |
| - | - | - | - | |
| 4 | 5 | SSW | 10.9 | |
| 3 | 5 | WNW | 12.4 | |
| 3 | 5 | SSW | 14.4 | |
| 3 | 5 | WSW | 15.7 | |
| 3 | 5 | WSW | 15.8 | |
| 3 | 5 | SW | 16.0 | |
| 4 | 5 | SW | 14.7 | |
| 4 | 5 | SW | 12.8 | |
| 5 | 5 | SW | 12.0 |
Realtime data displayed on this page is from the
Regional Coastal Monitoring Programme
.