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Facilities / Classes

  • Swimming2

    25m Indoor Pool

  • Swimming1

    13.5m Teaching Pool

  • Swimming4

    Changing Village

FREE SWIM for under 19's this Summer!

If you are under 19 and a resident of Three Rivers, you can swim for FREE on Mondays and Thursdays at William Penn between 9am - 12noon, and 3:30pm - 6:30pm. You can also swim for FREE at Rickmansworth School Pool on Wednesdays and Fridays between 10:30am - 11:30am. Advance registration for new participants is required. Free swimming runs Monday 25th July to Friday 2nd September. Admission subject to availability.


At William Penn we have a 25 metre, 4 lane main pool as well as a fantastic 13.5 metre teaching pool complemented by fully accessible changing facilities including disabled, family and group changing rooms.

Swimming isn't only a great form of general exercise, it can also be soothing, relaxing and best of all great fun!

Swimming is an excellent way to tone up and trim down. Just swimming a few lengths can involve most of the major muscle groups, giving your body a great work out.

The other big advantage of swimming is that water supports your weight and takes the stress off your joints, so you can put your body through a good work out without your knees, hips or spine paying the price.



See what's happening in the pool right now....


Our comprehensive pool programme is designed to cater for everyone and includes lane swimming sessions during early morning, lunchtime and evenings, casual sessions and Aqua Aerobic classes

Customer Notice

Please be advised we have a Pool Attendant Training Course taking place at William Penn on 17th and 18th August. The course will be using the pools at various times throughout the day, but we aim to keep disruption to a minimum. Thank you for your understanding.


Please note the following programme changes:

School Swimming will take place in 2 lanes in the main pool and the teaching pool on Wednesdays between 13:30 - 14:30 in addition to what is advertised in the pool programme.

A new swimming lesson has been added to the programme and will take place in the Teaching Pool on Mondays between 18:00 - 18:30. This is in addition to what is advertised in the pool programme.

Aqua Fitness Classes:

Monday - Aqua Zumba® 09:30 - 10:30 - NEW class will run alongside what is advertised in the programme

Monday - Aqua Aerobics 19:00 - 20:00

Tuesday - Aqua Aerobics 09:30 - 10:30

Wednesday - Aqua Aerobics 08:40 - 09:25 - NEW class will run alongside what is advertised in the programme

Thursday - Aqua Aerobics 19:30 - 20:30

Friday - Aqua Zumba®  10:35 - 11:20


Disabled Swimming Sessions

William Penn run two Disabled Swimming Sessions per week, which run alongside the sessions listed in the pool programme.

The mid-week session is held every Wednesday in both the main pool and teaching pool between 10.30am - 11.30am. The weekend session is held in both pools every Saturday between 3pm - 4pm.

The sessions are open to both disabled users and their carers/families (up to a maximum of four people). A PoolPod is available for those who require assistance.

For more information contact reception on 01923 771050 or visit the centre.

Over 60's FREE Swimming!

Come along or invite some friends to take the plunge!

All Three Rivers residents aged 60+ can swim for FREE on Mondays 12noon - 1pm, and Wednesdays 9am - 10am.  These free swim sessions are held within the general lane swim and public swim sessions, and we would request that lane etiquette is displayed at all times.

Advance registration is required for new participants.

Casual swimming at Rickmansworth School Pool.

-------------- Please note, Rickmansworth School Pool is closed for essential deep cleaning, we will advise on a re-opening time as soon as we have the information. -------------------

We are pleased to say that we are now able to offer casual swimming at Rickmansworth School Pool.  The swimming pool has undergone extensive refurbishments and welcomes all residents to the facility.  The heated pool measures 25m x 7.5m and has a 3m deep end.  There is a changing village with individual showers and cubicles, group/family change, and a comfortable seating area for spectators.

Swimming at Rickmansworth School Pool will take place at selected times during school holidays.

Summer Holiday swimming at Rickmansworth School Pool will take place Monday to Friday 10:30 - 14:30, between 25th July and 2nd September.


The Pool Inflatable

What better way to celebrate a birthday than with our challenging inflatable obstacle course!   We have a pool inflatable available for use in our birthday parties more info , or for you to enjoy in our family fun sessions more info .

All users must be aged 8 years and over and able to pass a swim competency test. Weak swimmers or anyone below this age will be unable to use the inflatable. Thank you for your co-operation.

Motivate4 Swim School

Want to know more about swimming lessons? Click here


Motivate4 SwimStyle

Swimming twice a week? You could save money with a SwimStyle Membership click here

Exercise In The Water

Fitness classes in the water. click here





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                             PAY-AS YOU GO PRICE LIST