UK Open Water Swimming Events

Swim England South West Region winter short-course championships at Millfield, Street. Qualifying times required.

Swim England's flagship short-course championships at Ponds Forge, Sheffield. The nation's top swimmers compete over 25m in December.

Mass-participation open water swim in Wales' largest natural lake, set in the stunning Snowdonia National Park.

First stop of the EPIC Lakes Open Water Swim Series (16th year). Choose 750m, 1500m, 3000m or 5000m. Friendly, relaxed atmosphere.

The UK's biggest open water swim. Thousands swim in Windermere over 3 days. Distances from 250m to 10k. Ages 8+. Sponsored by Coventry Building Society.

Second stop of the EPIC Lakes Swim Series. Swim in Ullswater with 750m, 1500m, 3000m or 5000m distances.

Sea swim race around iconic Burgh Island in South Devon with 1 and 2 mile options for adults and juniors.

A 2.1km open water swim in the Thames at Henley — swim the famous Henley reach where the rowers race.

Mass-participation open water swim in a scenic North Welsh lake, organised by Love SwimRun.

Open water swim at the scenic Derwent Reservoir near Consett, County Durham. Multiple distances for all abilities.

A 1.5km midsummer swim in the Thames at Henley — shorter distance option in the popular Henley Swim series.

Long-distance Thames swim with 5.5km, 9km and 13km options along the Marlow/Henley stretch. One of the UK's premier river swims.

Grand finale of the EPIC Lakes Swim Series. Swim in Windermere at Borrans Park. 750m, 1500m, 3000m or 5000m distances.

Open water swim festival with Full Moon (10K), Half Moon (5K) and shorter distances plus a Midland Masters category.

Swim through the iconic Thurlestone Arch in South Devon with 1, 2 and 3 mile options plus junior categories.

England's longest swim — 11 miles end-to-end of Windermere. A bucket-list challenge for serious open water swimmers.

Open water swim at Llyn Brenig reservoir in the Denbighshire hills with multiple distance options.