When UK water turns cold, a 5mm winter wetsuit is what keeps you surfing, kitesurfing, and swimming through the coldest months. This collection brings together women's 5mm wetsuits, cut for a female shape and built for warmth in winter conditions. From 5/3mm to 5/4mm fullsuits in back-zip and front-zip designs, there is a suit here to keep you out on the water when others have packed up for the season.

We stock women's winter suits from trusted brands including Mystic and O'Neill, using warm neoprene, sealed seams, and cosy linings. A good winter suit is an investment in your whole cold-season on the water, so it pays to choose one that fits and suits your sport.

Not sure which suit you need? The guide below explains thickness, zips, and fit. Browse the range below, and compare with our wider women's wetsuits range.

What Does 5mm Mean?

A 5mm wetsuit uses 5mm neoprene around the core, with slightly thinner neoprene at the arms and legs for flexibility, shown as 5/3mm or 5/4mm. The thicker core keeps your vital organs warm in cold water, while the thinner limbs let you move. This combination makes a 5mm suit the go-to choice for UK winter water, roughly 6 to 10 degrees, especially when paired with boots, gloves, and a hood.

When to Wear a 5mm Suit

A 5mm suit is designed for cold water, typically the winter months and into early spring when sea temperatures are at their lowest. If you ride year-round in the UK, a 5mm winter suit alongside a thinner summer suit covers the full calendar. For the very coldest spells, a hooded 5mm or 6mm suit with accessories keeps you comfortable when the water is at its iciest.

Women's Specific Fit

A women's wetsuit is cut for the female shape through the torso, hips, and legs, which matters even more in a thick winter suit. The right cut sits close to the skin with no loose gaps for cold water to flush through, which is essential for warmth. A suit designed for a female body fits better, flushes less, and keeps you far warmer than a unisex or ill-fitting suit.

Back Zip vs Front Zip

Winter suits come in different entry systems. Back-zip suits are the easiest to get in and out of, which is welcome with a thick winter suit, though they can let in slightly more water. Front-zip and chest-zip designs seal better and flush less, keeping you warmer, at the cost of being a little trickier to put on. For the coldest water, a front or chest zip has the edge on warmth.

What Keeps a Winter Suit Warm

Several features combine to keep a 5mm suit warm. Thicker neoprene is the foundation, but sealed and taped seams stop water seeping through the stitching, and warm, quick-drying thermal linings trap heat and help the suit dry faster between sessions. A snug fit ties it all together. The more of these a suit has, the warmer it will be, which is reflected in the price.

Accessories for Cold Water

A 5mm suit is the core of a winter setup, but accessories complete it. Neoprene boots keep your feet warm and protect them, gloves keep your hands working, and a hood prevents heat loss from your head, which is significant in cold water. Many winter surfers consider boots, gloves, and a hood essential alongside a 5mm suit once the water drops below about 10 degrees.

Getting the Fit Right

A winter wetsuit should fit snugly like a second skin, with no loose folds or gaps at the lower back, knees, or under the arms, as these let cold water flush through. It will feel tight on land and looser in the water. You should still be able to move and reach overhead. If you are between sizes, our team can help you choose, as fit varies between brands.

Caring for Your Winter Wetsuit

• Rinse in fresh, cool water after every session
• Dry inside out, away from direct sunlight
• Avoid hot water, washing machines, and tumble dryers
• Hang over a wide hanger to protect the shoulders
• Store loosely rather than folded tightly for long periods

Good care keeps a winter suit warm, flexible, and lasting for several seasons.

How Much Do Women's 5mm Wetsuits Cost?

Prices reflect the neoprene, seams, and linings. Entry-level 5mm suits keep you warm at a sensible price, mid-range suits add better seams and linings for more warmth and flexibility, and premium suits use the warmest, stretchiest neoprene with fully sealed seams. For regular winter use, a quality suit that keeps you genuinely warm is well worth the investment.

Why Buy Your Women's 5mm Wetsuit from Surface2Air Sports?

We have supplied watersports enthusiasts since 2002, with a shop in Poole and a full range online.

• Women's 5/3mm and 5/4mm winter wetsuits
• Back-zip and front-zip designs
• Trusted brands including Mystic and O'Neill
• Advice on pairing with boots, gloves, and a hood
• Help with fit and sizing for genuine warmth

Whether you surf, kitesurf, or swim through winter, we can help you stay warm. Explore our wider women's wetsuits and the full wetsuits range.

Frequently Asked Questions About Women's 5mm Wetsuits

When should I wear a 5mm wetsuit?

In cold water, typically UK winter and early spring at around 6 to 10 degrees. Pair it with boots, gloves, and a hood for the coldest conditions.

What does 5/3 or 5/4 mean?

The numbers are the neoprene thickness in millimetres: 5mm around the core for warmth and 3mm or 4mm at the limbs for flexibility.

Why choose a women's specific suit?

A women's suit is cut for the female shape, so it fits closely with no gaps for cold water to flush through, which keeps you far warmer.

Is a back zip or front zip warmer?

Front and chest zips seal better and flush less, so they are warmer, while back zips are easier to put on. For the coldest water, a front or chest zip has the edge.

Do I need boots, gloves, and a hood too?

For cold winter water, yes. They keep your extremities warm and prevent heat loss, and most winter surfers consider them essential alongside a 5mm suit.

How should a winter wetsuit fit?

Snug like a second skin with no loose gaps, tight on land and looser in the water. You should still be able to move and reach overhead.