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This Festival is in a testing state, and is not open for public sign-ups until the organiser has launched it.

Organiser's Description

Join us for some beautiful, challenging and friendly tidal estuary swimming at the picturesque village of Aberdovey at the southern end of the stunning Snowdonia National Park, Gwynedd, Wales. 

With a range of distances from 4km to 13km (the longest estuary swim event in the UK) choose your challenge and enjoy this special part of the Cambrian coastal area and UNESCO Biosphere.

For detailed event information please visit

See how it looked on previous years here: event photos.


The DYFI 13 km


The UK's longest estuary swim, The DYFI 13.

Swim from the beautiful beach in Aberdovey all the way up to the tidal limit of the Dovey estuary covering 13km of splendour, a journey that transitions from coast to mountain, from sea to river. Quite simply a stunning adventure and a superb challenge.

Water Temperature

At the start expect 15/16 degrees; at the finish around 14 degrees.

There will be significant tidal assistance for the first 10km, the vast majority of swimmers will finish in less than 3 hours. If you can swim consistently for 2.5 hours at 3km/h then you are in the right ball park.

The DYFI 13 is a special, and adventurous challenge.

Entry fee includes 

  • Private coach transport from registration (in Pennal) to the start point (in Aberdovey)
  • Full safety cover
  • Aid station
  • Special commemorative gifts for all swimmers
  • Top 3 prizes + first skins prize
  • Event photos 
  • Post-swim refreshments in Canolfan Pennal ​
  • WEBSCORER Timing
  • All logistics & reconnaissance

Fastest time is 1h 37m (2019), slowest time is 3h 52m (2018). 2019 results here.

Please see for timings on the day.

Event photos here 



Starting form the Aberdovey beach you will swim around the Jetty, on past the picturesque village and Penhelig corner, carry on past the Roman Road, Picnic Island, The Outward Bound Trust, the small castle (Trefri), and on all the way to a pebbly beach where the River Tafol joins the River Dovey at the settlement of Abertafol. This is the half-way mark.

At Abertafol you will "tumble-turn" and swim back to Aberdovey, your turn will (more or less) coincide with the turning of the tide. Expect the middle third of this swim to be the most challenging as it is likely that you will be swimming against a little tide during this time, but not for long - you will soon have the tide back on your side.

The last 100m is good fun swimming across a significant tide into the salvation of Aberdovey beach!

The TAFOL TUMBLE is 8km of challenging, engaging and adventurous swimming. Expect slight tidal assistance in the 1st, 2nd, 7th and 8th kilometre, the rest will be close to neutral.

Be a Tafol Tumbler!

There will be a feed station available at the 4km point (the turnaround point).

​Registration & Race HQ in Dovey Yacht Club




This is quite a special swim, one of the most beautiful & interesting estuary swims in the UK. 

You will start on Aberdovey beach just west of the iconic Jetty. The swim takes you around Aberdovey Wharf and Jetty, on past the picturesque village, the fishing boats and Penhelig corner. You will then carry on past Picnic Island and The Outward Bound Trust up to a big yellow house, and to what looks like a small castle (Trefri) on an island. 

This "castle" will be the turnaround point, at high tide it sits on an island reminiscent of something out of an Enid Blyton adventure. The tide will turn at some point during the middle third of the swim. Expect a little tidal assistance during the 1st and 4th kilometre, the 2nd and 3rd kilometre are more neutral.

Registration & Race HQ in Dovey Yacht Club


  • Registration: 8:30 - 10:00
  • Briefing: 10:20
  • Approximate swim start: 10:45

For full details visit



To sign-up for this event, the Service Fee is 4% (min 50p) for each sign-up

The DYFI 13 km
01 Dec 2020£70.00
01 May 2021£80.00
19 Sep 2021 23:59£85.00
01 Dec 2020£45.00
01 Jun 2021£50.00
22 Sep 2021 23:59£55.00
01 Dec 2020£35.00
01 Jun 2021£40.00
23 Sep 2021 23:59£45.00

Dates and Status

Status: Closed

EventDateAvailable/TotalClosing Date
The DYFI 13 km26 Sep 2021??/9219 Sep 2021 23:59
The TAFOL TUMBLE 8km25 Sep 2021??/5022 Sep 2021 23:59
BEAT THE TIDE 4 km25 Sep 2021??/14423 Sep 2021 23:59


Mike Alexander

01654 767426


Aberdovey Gwynedd LL35 0EB