Tonic Health Club
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The new spa at Castleknock Hotel is scheduled to open in December 2017 as a brand new purpose built spa
Tonic Health Club at Castleknock Hotel will reopen on 18th December 2017 as our new fitness and leisure centre with refurbished changing rooms and new aerobics studio on the ground floor. The Spa at Castleknock Hotel is also adjacent to the health club.
Something new just landed at Tonic đź‘€
And we’re pretty sure the gym bag is going to love it!
HYROX at Tonic đź’Ş
Get ready for HYROX training, with 50-minute sessions designed to put you through your paces and get you HYROX-ready.
đź“… Tuesdays & Wednesdays
⏰ 7:30pm
đź“Ť Studio
đź‘Ą Max. 12 participants
Interested in taking part? Put your name down at Reception to register your interest.
With just 12 spaces available, make sure you get your name down if you’re ready to take on the challenge 🔥
A huge thank you to everyone who joined us for Be Active Day at Tonic Health Club today! It was brilliant to see so many of you getting involved and bringing such great energy to the day! đź’™
21/09/2026
Tonight, Castleknock Hotel lights up in purple to mark World Alzheimer’s Day 💜
We are proud to show our support for everyone living with Alzheimer’s and dementia, and for their families, friends, and carers.
18/09/2026
Give the gift of time to switch off, unwind and enjoy a little well-deserved pampering with our Spa Voucher ✨ A thoughtful gift for someone special - and one they can enjoy in their own time.
Find the perfect Spa Voucher through the link https://www.castleknockhotel.com/vouchers/ ✨
January & February Dates Now Available! 🤩
Experience the calming power of a Sound Bath in our swimming pool, followed by an overnight stay and time to unwind.
Discover the package via the link https://www.castleknockhotel.com/the-spa/sound-and-float-experience/ 🤗
A little behind-the-scenes from the Thinking Factory… 👀
Our Tonic team have been getting to know something new that will soon be making an appearance in the Tonic shop 🤫
Any guesses?
Tonic is getting a little makeover đź‘€
Here’s a sneak peek before the big reveal…
11/09/2026
Something new has landed at the Spa ✨
Say hello to Spongellé - a little something to make your everyday self-care feel even better. From beautifully scented body buffers to indulgent body care, it’s the perfect addition to your routine 🫧
Now available at our Spa 🤗
10/09/2026
Day is coming to Tonic! đź’Ş
On 23rd September, we're opening our doors to everyone for a full day of movement, with four classes to try throughout the day:
9am Zumba
12pm Pilates
3pm Step Aerobics
6pm HYROX Training
And there’s more… 👀
✨ 10% off a 1-year membership or renewal
✨ First 10 people to sign up or renew get their first month FREE
✨ Vouchers for discounts at The Spa & Tonic retail
✨ Everyone who signs up or renews on the day goes into our giveaway to win either a 60-minute Fréamh Spa Treatment or dinner for two at Earth & Vine
Spaces are limited. To book your place, email [email protected]
Click here to claim your Sponsored Listing.
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Contact the business
Telephone
Website
Address
Porterstown Road
Dublin
DUBLIN15
Opening Hours
| Monday | 6am - 10pm |
| Tuesday | 6am - 10pm |
| Wednesday | 6am - 10pm |
| Thursday | 6am - 10pm |
| Friday | 6am - 10pm |
| Saturday | 8am - 8pm |
| Sunday | 8am - 8pm |