Caldera Hot TubsVIEW OUR RANGE Your leading supplier of
hot tubs in the MidlandsVIEW OUT HOT TUB RANGEThe Midlands Biggest Range of
Hot Tub & Swim Spa Accessories VIEW OUR RANGE OF ACCESSORIES Endless PoolsVIEW OUR RANGE
Ultimate Hot Tubs are the leading supplier of award-winning Hot Tubs, Swim Spas & Exercise Pools. We offer a wide range of affordable, high quality hot tubs, boasting fantastic manufactures warranty.
With over 25 years experience we pride ourselves on our industry knowledge and expertise, ensuring that the entire process for you is as straightforward and relaxed as it should be.
Caldera Savings Event
12th September – 18th October 2026
Save up to £1,500 + Free Accessory Bundle
Transform your everyday with the Caldera Savings Event. For a limited time, from 12th September to 18th October 2026, you can save up to £1,500 on selected hot tubs, plus receive a free accessory bundle with every tub.
Whether you are looking for the ultimate experience, premium performance, or everyday luxury, there is a Caldera hot tub for every lifestyle. Take advantage of our Take the Display Model offer if you want it now!
Exclusive Additional Offers
Free FreshWater® Salt System (Worth £1,000) for the first 7 customers.
Free Accessory Bundle (Worth £1,200) included with every tub, featuring Premium Steps, Cover Lifter, Thermal Cover, and Start-up Chemicals.
For 50 years, Caldera Spas has been redefining relaxation — evolving from a single custom spa in 1976 into a globally trusted name known for exceptional comfort, intelligent design, and powerful hydrotherapy. With signature features like Pure Comfort® seating and Hot Tub Circuit Therapy®, Caldera continues to lead the way, and to celebrate this milestone, you can explore their anniversary story, enjoy exclusive offers, and discover the latest models right here at Ultimate Hot Tubs.
Why Choose Caldera® from Ultimate Hot Tubs?
When you choose Caldera®, you’re not just buying a hot tub — you’re investing in 50 years of expertise, innovation, and relaxation.
And when you buy from Ultimate Hot Tubs, you get:
• Expert guidance to find the perfect spa •
• Professional installation and aftercare •
• Ongoing support from a trusted UK retailer •
👉 Start Your Caldera® Journey Today
Celebrate 50 years of world-class spa innovation with a hot tub designed around you.
Browse our Caldera® range or speak to our team today to find your perfect spa.
Introducing The Most Intelligent Salt System on the Planet.
FreshWater IQ is an in-line self-monitoring salt system that tells you what it needs to maintain clean, natural-feeling water, with less time and effort. Because we believe your hot tub should take care of you, not the other way around.
FreshWater IQ uses the FreshWater Salt System to generate the perfect amount of chlorine. With fewer chemicals, water feels softer and gentler on eyes and skin, and can stay clean and fresh for up to a full year*, conserving water and saving money.
Coast Spas™ have over 20 years of experience crafting the World’s Best Built Spas. Our mission is to deliver the highest quality spas with exceptional performance to customers worldwide.
Insulation: Tri-Thermic Barrier System (exceeds CEC standards)
Riptide Starlight Orion (EX-DISPLAY SALE)
Dimensions: 2180mm x 2180mm x 920mm
Seating Capacity: 5
Water Volume: 1350 litres
Power: 32Amp
Insulation: R18 Full Foam Insulation
Seychelles™
Dimensions: 213 x 213 x 91cm
Seating Capacity: 6
Water Volume: 1250 litres
Power: 25amp
Insulation: FiberCor®
Featured Products
Ultimate 7 Hot Tub (£7,245)
Dimensions: 213 x 213 x 91cm
Seating Capacity: 7
Water Volume: 1375 litres
Power: 32 amp
Insulation: FiberCor® Insulation
Endless Pools E550 Swim Spa (on display)
Dimensions: 457 x 239 x 147 cm
Seating Capacity: 2
Water Volume: 9049 litres
Power: 2 x 25amp
Insulation: Tri-Thermic Barrier System (exceeds CEC standards)
Endless Pools R500 Swim Spa
Dimensions: 457 x 226 x 127 cm
Seating Capacity: 5
Water Volume: 4090 litres
Power: 25amp
Insulation: Tri-Thermic Barrier System (exceeds CEC standards)
Martinique™
Dimensions: 226 x 193 x 87cm
Seating Capacity: 5
Water Volume: 1083 litres
Power: 25amp
Insulation: FiberCor®
Our hot tubs are arguably the best that money can buy in today’s market. They all boast unbelievable hydrotherapy, cutting edge technology, world-class build quality and have sold thousands worldwide!
Thousands of satisfied customers have already made the right choice and are enjoying the quality and luxury of owning a Riptide Hot Tub. We are dedicated to providing you with the best hot tub to suit you and your family.
