St Mary's Sound wave buoy monthly averages for 2025
Monthly averages from the St Mary's Sound wave buoy for 2025, including available wave height, period, direction, wind and sea temperature data.
Period Summary
AI-generated summary. Hog SaysIn 2025, St Mary’s Sound recorded 17,347 wave observations across all 365 days. Wave height averaged 4.3 ft, ranging from 0.1 to 22.1 ft, while wave periods averaged 5 seconds and ranged from 3 to 9 seconds. Water temperature averaged 13.4°C, ranging from 6.7°C to 19.4°C; no wind observations were supplied.
Generated only from the observations and comparisons shown on this page.
Average Wave Height
Available for 17,346 of 17,347 observations
Average Wave period
Average Wave Direction
Average Water temperature
Chart showing grouped wave observations for St Mary's Sound. Use the table on this page for a text version of the same measurements. To open daily observations, use a linked month name in the table.
Sorry, there is no wave data for Jan 2025
About St Mary's Sound wave buoy
St Mary's Sound station lies between the islands of St Mary's and St Agnes in the Isles of Scilly. The National Network first deployed its Datawell Directional WaveRider in May 2014 to measure the exposed nearshore wave climate around the archipelago. The station reports wave height, period and direction together with sea temperature.