Welcome to Marlow Open Water Swim

Marlow Open Water Swim operates the Open Water Swimming and SUP Boarding at Westhorpe Lake. This beautiful Lake is located in the heart of the Thames Valley and easily accessible from the whole of Berkshire, Buckinghamshire and Oxfordshire.

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.

Marlow Open Water Swim has three swim courses – 400m, 750m & 1500m.

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

Due to the COVID 19 situation and working in line with the government guidelines please adhere to the following rules at the lake. This is for the safety of yourself and also the team working. Any person not adhering to the rules will no longer be allowed to attend the lake.

  • NO first-time swimmers will be allowed at the moment until restrictions are relaxed. (This is anyone who hasn’t tried Open Water Swimming before).
  • NO children under 14 years old will be allowed on site at this time.
  • Unfortunately, NO pets are allowed at the lake.
  • All swimmers MUST complete a new up to date Waiver Form.
  • All swimmers MUST arrive ready to swim or get changed by car (changing rooms will be closed).
  • Card and Contactless Payments ONLY.
  • ONLY the Toilets to the rear of the clubhouse will be open.
  • No one apart from swimmers entering or exiting to be allowed on the pontoon.
  • One-way system will be in place to keep social distancing in place.
  • You MUST respect social distancing rules. It is the responsibility of all swimmers to follow these guidelines to protect yourself and others around you.

Opening Times


Open ALL Bank Holiday Mondays throughout the season.

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

*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.

Waiver Form

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 complete an online waiver form. (You will only need to complete the waiver form once for the season.)

Click Here To Complete Waiver Form Online


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

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