Our lido is fed by a natural geothermal spring that enters at a steady 19.8°C (around 68°F) at the shallow end. Thanks to this continuous spring flow, the water maintains a stable temperature throughout the pool. However, since it’s open to the elements, the overall water temperature does vary with the seasons — typically ranging from 15°C in the depths of winter to around 23°C on the hottest summer days. Most of the year, you can expect a refreshing swim in the 17–19°C range.

Yes, it truly is. The water comes straight from a natural spring and flows into the pool by gravity—nothing is added, and nothing is taken away. It continuously moves through the pool before being directed into the River Derwent.

The pool was originally built in 1934 using imperial measurements and measures 40 yards long by 14 yards wide. That’s approximately 36.5 metres in length, offering plenty of space for both leisurely swims and more active lengths. 340340. You can also view our full dog-friendly policy here.

In short, no — the pool is not artificially heated. The water comes from a geothermal spring that rises from deep underground, which is why it enters the pool at a naturally warm 19.8°C. However, because the pool is open to the elements, the overall water temperature can feel quite cool, especially to those not used to swimming in natural spring water.

We are currently operating the pool with an online booking system. This is to ensure we avoid overcrowding. The usual configuration of the pool is with three wide lanes and with no more than ten swimmers per lane. This leaves one narrow lane marked as a Disability lane which we like to leave empty for anyone that needs it. (This set-up is subject to change but never to the detriment of what we consider unsafe or uncomfortable for our swimmers’ experience).

Yes it is free for hotel guests to use the lido. Just present a room key to the Lifeguards on duty and sign in at the lido entrance.