Best Open Water Swimming Wetsuits UK
Best Open Water Swimming Wetsuits UK — What to Buy and Why Thickness Matters
I am a PADI Divemaster. I have been underwater in Scapa Flow in the Orkneys with water cold enough that only my face was exposed. I know cold water wetsuits. And I can tell you that a swimming wetsuit and a diving wetsuit are not the same thing — and the difference matters for how you perform in the water.
Here is the honest guide to the best open water swimming wetsuits available in the UK right now.
Swimming Wetsuit vs Diving Wetsuit — The Key Difference
A diving wetsuit is designed for warmth and durability. It is typically thicker, stiffer, and cut to allow freedom of movement while carrying equipment. You are not swimming fast in a diving wetsuit — you are moving slowly, conserving energy, managing buoyancy.
A swimming wetsuit is designed for performance and buoyancy assistance. It is cut specifically for the swimming stroke — thinner neoprene in the shoulders and arms for maximum reach and flexibility, thicker neoprene in the legs and core for buoyancy and warmth. A swimming wetsuit helps lift your body position in the water and reduces drag. A diving wetsuit does none of these things.
For open water swimming in the UK — use a swimming wetsuit. Using a diving wetsuit for open water swimming is like running in hiking boots. You can do it, but you will work significantly harder for worse results.
What Thickness Do You Need for UK Waters?
The minimum safe open water swimming wetsuit for UK waters is 3:5 thickness — 3mm of neoprene around the chest and arms, 5mm around the legs and core. This is the consensus recommendation from open water swimming coaches and is the minimum that provides sufficient buoyancy and warmth for year-round UK swimming.
Anything thinner than this specification means you are unlikely to be buoyant on your back in an emergency position and will not have sufficient warmth for most UK conditions beyond six to eight weeks in high summer.
For summer swimming in warmer conditions — a 3:3 suit is manageable for experienced swimmers. For winter or year-round swimming — consider a 5mm thermal suit or a drysuit equivalent.
Our Recommended Open Water Swimming Wetsuits
Orca Athlex Float V2
Best All-Round
Consistently one of the most popular open water swimming wetsuits in the UK. 3:5 buoyancy profile, Yamamoto neoprene construction, excellent flexibility through the shoulders. Widely used at UK open water events. Suitable for summer sea swimming, triathlons, and lake swimming.
Huub Aegis X
Best for Flexibility
Huub design their wetsuits in collaboration with elite swimmers and the Aegis X reflects this — outstanding flexibility through the upper body with the neutral arm positioning design that reduces shoulder fatigue on longer swims. Excellent buoyancy profile and well-regarded across the UK open water swimming community.
Zone3 Vision
Best Mid-Range
Zone3 make some of the best value quality open water swimming wetsuits available. The Vision hits the right price point for most recreational open water swimmers — quality neoprene, good buoyancy, comfortable fit, and FINA approved for competitive use.
Orca Zeal Hi-Vis
Best for Safety and Visibility
The bright orange arms and legs of the Zeal Hi-Vis make you significantly more visible to other water users — an underrated safety feature for sea and lake swimming where boat traffic is a consideration. Also includes a Restube Ready clip for attaching an inflatable safety device. Excellent warmth and buoyancy.
Orca Vitalis Thermal
Best for Winter
For cold water swimming from autumn through spring, the Vitalis Thermal adds additional insulation without compromising flexibility significantly. If you plan to swim year-round in UK waters, this is the honest recommendation over a standard summer suit.
Essential Accessories
TRISLIDE Wetsuit Lube Spray
Keep your body performing as well as your kit. This is NEEDED.
Open Water Swimming, Anti Chafe & Friction Protection, Helps Put On & Remove Wetsuit, Prevents Blisters & Chafing, Long Lasting Glide
DIPPY Tow Floats for Open Water Swimming
BE SEEN – BE SAFE – BE ORIGINAL: Unique swimming buoy open water with a fun design is a must have swim float and Swimming Tow Float Dry Bag for your cold water swimming accessories. Stand out from the crowd & water users with this swim float open water. Built in whistle attracts attention & keeps you safe. Open water swimming floats adults aid you while you rest & chat. Great Tow Float for open water swimming
ZONE3 Neoprene Active-Flex Swim
2mm Warm and Stretchy Neoprene: Ensures warmth and flexibility. Adjustable Hem: Provides a secure and comfortable fit. Watertight Seams: Glued and blindstitched seams to keep water out.
FAQs
Can I use a surfing wetsuit for open water swimming?
A surfing wetsuit is thicker and less flexible through the shoulders than a swimming wetsuit. You can swim in one but you will tire faster and your stroke will be compromised. For serious open water swimming — use a dedicated swimming wetsuit.
How long should an open water swimming wetsuit last?
With proper care — rinsing after every use, drying away from direct sunlight, storing flat — a quality open water wetsuit should last 3 to 5 years of regular use. Yamamoto neoprene wetsuits from brands like Orca and Zone3 are notably durable.
What size wetsuit do I need?
Always follow the brand’s specific size chart based on your height and weight. Different brands cut differently — a medium in Orca may not fit the same as a medium in Zone3. If you are between sizes, most swimming wetsuit coaches recommend sizing down for a snug fit that prevents flushing.
Always swim with a buddy or in a managed venue. This article is for general guidance — always check conditions before open water swimming. marinesafetyguide.com participates in affiliate programmes including Amazon Associates and may earn a small commission on purchases made through links on this site.
