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 47 swim dates in our solo swims database during 2018: Jun 22nd, Jun 23rd, Jun 25th, Jul 5th, Jul 6th, Jul 7th, Jul 8th, Jul 11th, Jul 12th, Jul 13th, Jul 14th, Jul 15th, Jul 18th, Jul 19th, Jul 20th, Jul 21st, Jul 22nd, Jul 24th, Jul 25th, Jul 26th, Aug 1st, Aug 2nd, Aug 3rd, Aug 6th, Aug 7th, Aug 17th, Aug 20th, Aug 21st, Aug 22nd, Aug 28th, Aug 29th, Aug 30th, Aug 31st, Sep 1st, Sep 2nd, Sep 3rd, Sep 13th, Sep 24th, Sep 25th, Sep 26th, Sep 27th, Sep 29th, Sep 30th, Oct 3rd, Oct 4th, Oct 5th, Oct 8th.


  • 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.