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 37 swim dates in our solo swims database during 2021: Jun 17th, Jun 20th, Jun 28th, Jul 1st, Jul 2nd, Jul 9th, Jul 10th, Jul 12th, Jul 18th, Jul 19th, Jul 20th, Jul 21st, Jul 23rd, Aug 1st, Aug 2nd, Aug 3rd, Aug 4th, Aug 12th, Aug 20th, Aug 21st, Sep 5th, Sep 6th, Sep 7th, Sep 12th, Sep 13th, Sep 15th, Sep 16th, Sep 17th, Sep 18th, Sep 19th, Sep 21st, Sep 25th, Oct 7th, Oct 9th, Oct 13th, Oct 16th, Nov 11th.


  • 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.