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Day Spa

Tonic Day Spa is the hotel day spa at Castleknock Hotel offering a range of holistic treatments, beauty regimes as well as pre-natal and post-natal treatments. It includes 6 treatment rooms including a relaxation room and is open from 5-9pm midweek and from 10-6pm weekends for treatments. To avoid disappointment we would advise that guests book treatments in advance

Click here to view our spa treatment brochure 

Please note that due to an exciting expansion development at the hotel in 2017, Tonic Leisure Centre, including our normal fitness centre, swimming pool, jacuzzi, sauna and steamroom will be closed from January 2nd 2017 until December 2017. All other ground floor areas remain unaffected by the expansion.



NEW TONIC Day Spa Opening Hours January 2017
Monday & Tuesday            5pm to 9pm
Wednesday - Friday          5pm to 9pm
Saturday                          10am to 6pm
Sunday                            10am to 6pm 

To enquire about spa treatments, please fill in the below form, email us or call 016406333