Welcome to Marlow Open Water Swim

Marlow Open Water Swim operates the Open Water Swimming, Running, Aquathlon (Swim/ Runs) and SUP Boarding at Westhorpe Lakes. The is located in the heart of the Thames Valley and easily accessible from the whole of Berkshire, Buckinghamshire and Oxfordshire.

With over 45 acres of lake space and some of the best running trails and river Thames towpath nearby, Marlow Open Water Swim at Westhorpe Lakes is a great place for the summer months to train, relax and unwind after a long day at work or start to your weekend.

The team are all highly experienced athletes and have raced at every level in triathlon and have over 15 years experience in running open water swimming venues and sporting events.

If you want to take up open water swimming or your first triathlon, or just want a safe and professionally run lake to train from, then Marlow Open Water Swim is the place to be in the summer.

We provide open water swim coaching and triathlon coaching all season and can cater for all levels. All of the coaches have competed for many years and are qualified to take you through your paces and get the results you look to achieve.

Throughout the summer months, there are Aquathlon Races, Open Water Swim races and Full Moon Swims, which happens for times throughout the summer months. Keep an eye on the Events pages for dates and how to enter.

We look forward to seeing down at Marlow Open Water Swim soon.

Please note: As the venue is located by a private working farm unfortunately NO Dogs are allowed on site. 

New To The Lake?

First time at the Lake this season? Fill out our Waiver Form before your first swim.

Before your first open water swim of the season at Marlow Open Water Swim we ask all swimmers to fill out & complete a signed waiver form. (You will only need to complete the waiver form once for the season.) The waiver form can be printed off from the button below.

Click Here To Print Off A Waiver Form

Opening Times

Day Morning Evening
Saturday 6:00am – 9:00am CLOSED
Monday CLOSED 5:30pm – 8:00pm*
Wednesday CLOSED 5:30pm – 8:00pm*

Open ALL Bank Holiday Mondays throughout the season.

*Evening swims may finish earlier than 8:00pm depending on the time of the year due to daylight hours. Swimming will close at 8pm or dusk (which ever is first).

Last entry into the lake on evening sessions is 7:30pm.


Westhorpe Water Sports Centre, Westhorpe Farm, Westhorpe Farm Lane, Little Marlow, Bucks, SL7 3RQ

Open Water Swim

Aquathlons/ Events

Check up on the latest events taking part at the lake during the whole season.

See All Events

Open Water Swim

Wetsuit Hire

Wetsuit hire is available at every session with our partners at Hireawetsuit.

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Open Water Swim

Swim Coaching

New to Open Water Swimming or just need to improve your technique?

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