Channel Swimming & Piloting Federation "Nothing great is easy", Captain Matthew Webb

Sandettie Lightship Buoy Data

Daily values taken at 12 noon UTC.
Tidal range is the absolute difference between high and low Dover tides.

There were 29 swim dates in our solo swims database during 2020: Jul 12th, Jul 14th, Jul 16th, Jul 17th, Jul 30th, Aug 3rd, Aug 4th, Aug 5th, Aug 6th, Aug 7th, Aug 11th, Aug 12th, Aug 13th, Aug 14th, Aug 15th, Aug 16th, Aug 31st, Sep 1st, Sep 2nd, Sep 6th, Sep 10th, Sep 11th, Sep 13th, Sep 14th, Sep 21st, Sep 22nd, Sep 28th, Oct 9th, Oct 17th.


  • Data shown on these graphs are from the Sandettie Lightship Buoy automatic weather station. It is the closest station measuring sea temperatures and weather to the Channel swimming routes.
  • To track graph values move the mouse over the graph area. To change graph resolution, highlight the area of interest. To zoom out, double-click on the graph area.
  • Sandettie data is provided by the Met Office: it contains public sector information licensed under the Open Government Licence v1.0. Please read our detailed notes on Sandettie data and interpreting these graphs and values.
  • Tide range data is calculated by the XTide freeware. See our Tides section for more information. 
  • If you have any suggestions or comments on how we presented this data, please contact us.