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The list below can then be filtered to show Open Water Swimming events in date sequence.
| Events List Page | ||||
|---|---|---|---|---|
| Fri 14 May 2021 |  |  |  Sospan Charity Swim750m 1500m 2250m 3000m Llanelli  | |
| Sat 15 May 2021 | |  | Greater Manchester Swim! 1 mile 500m 3 miles Salford Quays Salford  | |
| Sun 16 May 2021 |  | | BLDSA Colwick Park Championships 5km 1km Nottingham Notts | |
| Sat-Sun 22-23 May 2021 | | | Keswick Mountain Festival Derwent Swims 1500m 3km 5km Keswick Cumbria | |
| Sun 23 May 2021 |  |  | Marlow Classic River Swim 1.5km 3km Marlow Berks | |
| Date TBC | | | Full Ironman and Half Ironman Lake Swim 1.9km 3.8km Westhampnett Chichester W. Sussex | |
| Sat 29 May 2021 | | | Castle Swim Series - Lough Cutra Castle 1 mile 2.5km 5km Gort Co. Galway  | |
| Sat 05 Jun 2021 | | | The BIG Bala Swim 1.5km 4.5km 9km Bala Gwynedd | |
| Sun 06 Jun 2021 |  | | Colwyn Bay Oceanswim 2km 3km 5km 10km Colwyn Bay Clwyd | |
| Sun 06 Jun 2021 | | | Epic Lakes Swim Ullswater 500m 1 mile 3.8km Glenridding Cumbria | |
| Date TBC | | | The Welsh Salty Sea Swim Series 1 750m 1500m 2km 3km Relay Colwyn Bay | |
| Sun 06 Jun 2021 | | | Jubilee River Swim 10km Windsor Berks | |
| Thu 10 Jun 2021 | | | Hillingdon Triathletes Open Water Swim - Race 1 1000m 2000m Denham Bucks | |
| Fri-Sat 11-13 Jun 2021 | | | Great North Swim 250m 1/2 mile 1 mile 2 miles 5km 10km Windermere Cumbria | |
| Sat 12 Jun 2021 | | | Bradford-on-Avon Slow Swim and Picnic 1.7km Bradford-on-Avon Wiltshire | |
| Sat-Sun 12-13 Jun 2021 | | | Dartmouth Open Water Swim 750m 1500m Blackpool Dartmouth Devon | |
| Date TBC | | | Dartmoor Open Water Swim 2km 5.6km Broadwoodwidger Lifton Devon | |
| Sat 19 Jun 2021 | | | Salty Sea Dog Long Swims 2.5km 3.8km Boscombe Bournemouth Dorset | |
| Sat 19 Jun 2021 | |  | BLDSA Champion of Champions (South) Dover Harbour 1 mile 3 miles 5 miles Dover Kent | |
| Sat 19 Jun 2021 | | | Castle Swim Series - Cholmondeley Castle 1 mile 2.5km 5km Malpas Cheshire | |
| Sat 19 Jun 2021 | | | Swim The English Channel Up North Challenge 36km Allostock Cheshire | |
| Sat 19 Jun 2021 | | | Great East Swim 250m 1/2 mile 1 mile 2 mile 5km 10km Ipswich Suffolk | |
| Sun 20 Jun 2021 | | | Monster Swim 5km Fort Augustus Inverness-shire  | |
| Fri 25 Jun 2021 | | | The Wales Swim 1.2 miles 2.4 miles Tenby Pembrokeshire | |
| Sun 27 Jun 2021 | | | Selkie Henley Classic 2.1km Henley-on-Thames Oxon | |
| Sun 27 Jun 2021 |  | | Drakes Island Swim 1.5km Plymouth | |
| Sun 27 Jun 2021 | | | Tal-y-llyn Swim 2km 10km Tal-y-Llyn Gwynedd | |
| Sun 27 Jun 2021 | | | LLyn Padarn End to End Swim Challenge 2 miles Llanberis | |
| Sat 03 Jul 2021 | | | Boulter's to Bray Swim 1.4km 2.8km Maidenhead Berks | |
| Sat-Sun 03-04 Jul 2021 | | | BLDSA Bala 1km 3km 6 miles 3 miles Bala Gwynedd | |
| Sat 03 Jul 2021 | | | MediaCityUK Swim Challenge 1500m 5km 10km 15km Salford Quays Salford | |
| Sat-Sun 03-04 Jul 2021 | | | Bournemouth Pier to Pier Swim 1.4 miles Bournemouth Dorset | |
| Sun 04 Jul 2021 | | | Swim Bewl 2km 5km 10km Lamberhurst Tunbridge Wells Kent | |
| Sun 04 Jul 2021 | | | Hever Castle Festival of Endurance 1.9km 3.8km 10km Hever Edenbridge Kent | |
| Sun 04 Jul 2021 | | | Fugitive Open Water Swim 1.5km 3.0km Marlow Berks | |
| Sun 04 Jul 2021 | | | English Riviera Beach Swim 750m 1500m 3000m Youngs Park Paignton Devon | |
| Sat 10 Jul 2021 | | | Salty Sea Dog Long Swims 2.5km 3.8km Boscombe Bournemouth Dorset | |
| Sat 10 Jul 2021 | | | BLDSA Torbay 4 miles 8 miles Torquay Devon | |
| Sat 10 Jul 2021 | | | The BIG Welsh Swim 1.3km 3km 6km 9km Llanberis Gwynedd | |
| Sat 10 Jul 2021 | | | Cambridge Slow Swim and Picnic 2.5km Grantchester Cambridge | |
| Sun 11 Jul 2021 | | | Epic Lakes Swim Derwent 500m 1 mile 3.8km Keswick Cumbria | |
| Sun 11 Jul 2021 | | | Henley Swim Festival 1 mile 200m 800m Henley-on-Thames Oxon | |
| Sat 17 Jul 2021 | | | Chillswim Ullswater End to End 7 miles Howtown, Pooley Bridge Penrith Cumbria | |
| Sun 18 Jul 2021 | | | Cawsand Swim Unknown Cawsand Torpoint Devon | |
| Sat 24 Jul 2021 | | | BLDSA Coniston 5.25 miles Coniston Cumbria | |
| Sat 24 Jul 2021 | | | Swim The Bay 1.2 miles 2.4 miles Weymouth Dorset | |
| Sat 24 Jul 2021 | | | Castle Swim Series - Castle Howard 1 mile 2.5km 5km York N. Yorks | |
| Sat 24 Jul 2021 | | | Club to Pub 1.5km Henley-on-Thames Oxon | |
| Sun 25 Jul 2021 | | | BLDSA Coniston Short Course 3.85 miles Coniston Cumbri | |
| Thu 29 Jul 2021 | | | Hillingdon Triathletes Open Water Swim - Race 2 1000m 2000m Denham Bucks | |
| Sat 31 Jul 2021 | | | Aqua Sphere Snowman Swim 1000m 2000m 2.4 miles Betws-y-Coed Clwyd | |
| Sun 01 Aug 2021 | | | Epic Swim Wigan 750m 1500m 3.8km Bryn Wigan | |
| Sat 07 Aug 2021 | | | Bewl Triathlon OW Swims 1.9km 3.8km Lamberhurst Tunbridge Wells Kent | |
| Sat 07 Aug 2021 | | | Salty Sea Dog Long Swims 2.5km 3.8km Boscombe Bournemouth Dorset | |
| Date TBC | | | St Michael's Mount Swim 1 1/2 miles Marazion Cornwall | |
| Sun 08 Aug 2021 | | | SwimRutland Mini 2km 4km 8km Whitwell Oakham Rutland | |
| Sun 08 Aug 2021 | | | Dedham Vale Mill 2 Mill Swim and Picnic 2.3km Dedham Essex | |
| Sat 14 Aug 2021 | | | BLDSA Ullswater 7 miles Glenridding Cumbria | |
| Sun 15 Aug 2021 | | | Thames Marathon - Bridge to Bridge 14km Henley-on-Thames Oxon | |
| Sun 15 Aug 2021 | | | Epic Lakes Swim Coniston 500m 1 mile 3.8km Coniston Cumbria | |
| Sun 15 Aug 2021 | | | BLDSA Derwentwater 2 miles 5.25 miles Keswick Cumbria | |
| Sun 15 Aug 2021 | | | Cotswolds Lake62 Swims 1.5km 3.8km 5km 10km Ashton Keynes Wilts | |
| Sat 21 Aug 2021 | | | Go Swim Loch Tay 250m 750m 1500m 3000m Kenmore Aberfeldy | |
| Sat 28 Aug 2021 | | | BLDSA Loch Lomond 1km 21.6 miles Arrochar Argyll | |
| Sat 28 Aug 2021 | | | Go Swim Loch Lomond 250m 750m 1500m 3000m 5000m 10000m Balloch Alexandria | |
| Sun 29 Aug 2021 | | | Conquer the Chilterns River Swim 1.5km 3.0km Henley-on-Thames | |
| Sat 04 Sep 2021 | | | Chillswim Coniston End to End 5.25 miles Coniston Cumbria | |
| Sat 04 Sep 2021 | | | BLDSA Windermere 10.5 miles Newby Bridge Cumbria | |
| Sat 04 Sep 2021 | | | Dock2Dock 1500m 5km 10km 15km London | |
| Sat 04 Sep 2021 | | | SwimRutland Night Swim 250m 750m Whitwell Oakham Rutland | |
| Sun 05 Sep 2021 | | | Dorney Lake Swim 750m 1.5km 3km Eton Windsor Berks | |
| Sun 05 Sep 2021 | | | Looe Island Swim 1 mile Looe Cornwall | |
| Sat 11 Sep 2021 | | | Salty Sea Dog Swim Long 2.5km 5km 10km Boscombe Bournemouth Dorset | |
| Sat 11 Sep 2021 | | | BLDSA St Mary's Loch 1km 3.25 miles 6.5 miles Selkirk Scottish Borders | |
| Sun 12 Sep 2021 | | | The Big Brutal Swim 2.5km 5km 10km Llanberis Gwynedd | |
| Date TBC | | | Lyme Splash 3.15km Lyme Regis Dorset | |
| Sat 18 Sep 2021 | | | Epic Lakes Swim Windermere 500m 1 mile 5km Newby Bridge Cumbria | |
| Sat 18 Sep 2021 | | | Neon Night Swim 750m 1500m 3000m Salford Quays Salford | |
| Sun 19 Sep 2021 | | | Burgh Island Swim 1 mile Bigbury-On-Sea Devon | |
| Fri 24 Sep 2021 | | | UK Ultimate Swim 2.4 miles 1.2 miles 0.6 miles Whitchurch | |
| Sat 25 Sep 2021 | | | Castle Swim Series - Hever Castle 1 mile 2.5km 5km Hever Edenbridge Kent | |
| Sat 25 Sep 2021 | | | Aberdovey Swim - Beat the Tide 4km Aberdovey Gwynedd | |
| Sat 25 Sep 2021 | | | Aberdovey Swim - Tafol Tumble 8km Aberdovey Gwynedd | |
| Sun 26 Sep 2021 | | | Aberdovey Swim - The Dyfi 13km Aberdovey Gwynedd | |
| Sat 02 Oct 2021 | | | The Great Fjord Swim 750m 2km 3.9km Leenane Co. Galway | |
| Date TBC | | | Tribal's End of Season Lake Swim 1km 3km 5km 10km Westhampnett Chichester W. Sussex | |
| Tue 26 Oct 2021 | | | Exmoor Open Water Swim 2km 4km 6km Brompton Regis Dulverton Somerset | |
| Fri 29 Oct 2021 | | | Halloween Spooky Swim Dip Allostock Cheshire | |
| Sat 06 Nov 2021 | | | Tal-y-llyn - Cool Mile & KM 1km 1 mile Tal-y-llyn Gwynedd | |
| Sat 20 Nov 2021 | | | The Welsh Winter Swim 50m 100m 250m 500m Llanberis Gwynedd | |
| 82 confirmed events 2 provisional events 6 events to be confirmed | ||||
