St Mary's Sound wave buoy observations on Tue, Aug 11, 2026
Hourly readings from the St Mary's Sound wave buoy for Tue, Aug 11, 2026, including available wave height, period, direction, wind and sea temperature data.
Period Summary
Programmatically generated summary. Hog Says45 wave-buoy observations were recorded during the day. Typical wave height was 1.4 ft (10th–90th percentile 1–2.5 ft), while mean peak wave period was 5.6 seconds (10th–90th percentile 4.3–6.8 seconds). Typical provider-reported wave power was 0.4 kW/m (10th–90th percentile 0.3–1.2 kW/m). Mean water temperature was 18.9°C (10th–90th percentile 18.2–19.6°C). All 180 checked values passed quality control.
Generated only from the observations and comparisons shown on this page.
Line chart showing wave height, wave period and sea temperature for St Mary's Sound. Use the detailed observations table below for the same data in text form.
Sorry, there is no wave data :(
for Tue, Aug 11, 2026
About St Mary's Sound wave buoy
St Mary's Sound station lies between St Mary's and St Agnes in the Isles of Scilly. The National Network first deployed a Datawell Directional WaveRider here in May 2014, establishing a nearshore record for an archipelago exposed to Atlantic swell and important to local navigation and coastal management.
Its current data source reports wave height, wave period, wave direction, directional spread and sea temperature.
| Metric | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significant wave height (ft) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | 2 | 2 | - | 3 | 3 | - | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Maximum wave height (ft) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | - | - | - | - | - | - | - | - | - | - | - | 3 | 3 | 4 | 3 | 3 | 4 | 4 |
| Peak period (s) | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 7 | 6 | 7 | 7 | 7 | 7 | 6 | 6 | 7 | 7 | 6 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 7 | 3 | 7 | 7 | 3 | - | 4 | 3 | - | 4 | 4 | - | 4 | 5 | 5 | 5 | 4 | 5 | 4 | 5 | 5 | 5 | 5 |
| Zero-crossing period (s) | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | - | 3 | 3 | - | 4 | 4 | - | 4 | 4 | 4 | 4 | 3 | 3 | 4 | 3 | 4 | 4 | 4 |
| Energy period (s) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 5 | 4 | 4 | 5 | 4 | 4 | - | 4 | 4 | - | 4 | 4 | - | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Wave power, kilowatts per metre | 0.47 | 0.46 | 0.46 | 0.4 | 0.46 | 0.43 | 0.45 | 0.44 | 0.39 | 0.34 | 0.29 | 0.22 | 0.25 | 0.3 | 0.24 | 0.27 | 0.33 | 0.32 | 0.29 | 0.32 | 0.29 | 0.23 | 0.22 | 0.25 | 0.25 | 0.27 | 0.25 | 0.26 | 0.28 | 0.35 | - | 0.6 | 0.76 | - | 1.27 | 1.28 | - | 1.42 | 1.25 | 1.05 | 0.85 | 0.94 | 0.98 | 1.16 | 0.94 | 0.87 | 1.12 | 1.16 |
| Peak wave direction | SW | SW | SW | WSW | SW | WSW | WSW | WSW | W | SW | WSW | SSW | SSW | SSW | SW | SW | SW | SW | SW | SSW | SW | SSW | SSW | SSW | SSW | SSW | ESE | SW | WSW | E | - | E | E | - | ENE | E | - | E | ESE | ESE | ESE | ESE | ESE | ESE | ESE | ESE | ESE | ESE |
| Directional spread (°) | 49.5 | 47.4 | 57.0 | 59.8 | 51.4 | 62.2 | 58.1 | 61.8 | 65.8 | 53.7 | 69.3 | 51.5 | 62.6 | 50.9 | 38.5 | 49.4 | 50.5 | 35.8 | 51.1 | 46.4 | 52.9 | 59.0 | 57.1 | 51.0 | 46.8 | 48.6 | 37.8 | 58.2 | 63.7 | 27.3 | - | 27.2 | 28.2 | - | 29.3 | 28.4 | - | 32.2 | 25.6 | 27.2 | 27.9 | 30.3 | 33.7 | 25.4 | 29.7 | 22.8 | 24.4 | 25.6 |
| Water temperature(°C) | 19.1 | 18.9 | 19.0 | 18.9 | 19.6 | 19.8 | 19.7 | 19.6 | 19.6 | 19.4 | 19.3 | 19.3 | 18.0 | 18.5 | 18.6 | 18.0 | 18.4 | 18.5 | 19.0 | 19.0 | 19.1 | 19.1 | 18.8 | 18.8 | 18.5 | 18.2 | 18.8 | 18.6 | 18.1 | 18.5 | - | 18.4 | 19.3 | - | 19.5 | 17.6 | - | 19.0 | 18.1 | 17.4 | 17.6 | 18.7 | 19.1 | 19.6 | 19.9 | 19.9 | 19.5 | 19.0 |
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Observation data source
Learn how SurfHog combines, checks and summarizes observations in the data and methodology notes.