Start Bay wave buoy daily averages for Sep 2025
Daily averages from the Start Bay wave buoy for Sep 2025, including available wave height, period, direction, wind and sea temperature data.
Period Summary
AI-generated summary. Hog SaysIn September 2025, Start Bay recorded 1,434 wave-buoy observations across 31 observed days, with 103% day coverage and no partial period. Average wave height was 2.4 ft and wave period 4.4 seconds, while water temperature averaged 16.4°C; wind data was unavailable. Over 11 historical same-month years, averages were 1.9 ft, 6 seconds and 17.2°C respectively.
Generated only from the observations and comparisons shown on this page.
Average Wave Height
Average Wave period
Average Wave Direction
Average Water temperature
Compared With Previous Septembers
Historical baseline from 8,469 observations across 11 years.
- Wave Height
- 2.4ft
- 0.5ft above average
- Historical average 1.9ft
- Wave Period
- 4.4s
- 1.6s below average
- Historical average 6s
- Water Temperature
- 16.4°C
- 0.8°C below average
- Historical average 17.2°C
Chart showing grouped wave observations for Start Bay. Use the table on this page for a text version of the same measurements. To open hourly observations, use a linked day name in the table.
Sorry, there is no wave data for Mon, Sep 1, 2025
About Start Bay wave buoy
Start Bay is a Datawell Directional WaveRider station off the south Devon coast. First deployed in April 2007, it measures waves entering the bay between Start Point and the Dartmouth approaches. Available observations include wave height, period and direction, sea temperature and calculated wave power.