Wetsuits

Wetsuit choice comes down to water temperature, how long you are in and how hard you are working. Thickness sets the insulation; fit decides whether that insulation does anything at all. We stock suits from Fourth Element, Waterproof, Cressi, Beuchat and Aqualung among others, in adult and children's sizes, for UK diving and for warmer water abroad. Try one on if you can get to us.

Female diver wearing DynamicNord full length wetsuit
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    How to choose a wetsuit

    The wetsuit you choose should be based primarily on water temperature, activity type, and duration in the water. Wetsuit thickness is measured in millimetres and directly affects both insulation and flexibility.

    General thickness guide

    • Warm water, above 24C: 1.5 to 2 mm wetsuit or rash vest
    • Mild water, 18 to 24C: 2 to 3 mm wetsuit
    • Cool water, 14 to 18C: 4 to 5 mm wetsuit
    • Cold water, below 14C: 5 mm or more, or a drysuit

    These are guidelines only. Cold tolerance varies between individuals, and longer dives or low-activity diving will generally require more insulation. Most UK inland and coastal diving sits in the bottom two bands for much of the year, which is why many divers here eventually move to a drysuit.

    Fit matters as much as thickness

    A wetsuit works by holding a thin layer of water against your skin. If the suit is loose, that water is flushed and replaced as you move, and the suit will not keep you warm regardless of how thick it is. Choosing the right wetsuit is about matching conditions, fit and intended use together.

    Advice and sizing

    You can read more in our Guide to Wetsuits. If you want personalised advice, sizing help, or to compare options in person, visit Dive Rutland or speak to the team. We use this equipment ourselves and are always happy to help you make the right choice.

    Frequently asked questions

    UK inland and coastal water spends most of the year in the cool and cold bands, so divers here are usually in 5mm or more, often with a hood and gloves.

    The thickness guide above is a starting point, not a rule. How long you are in the water, how hard you are working and your own cold tolerance all move the answer. If you are diving through the winter, it is worth comparing a thick wetsuit against a drysuit before deciding.
    Snug everywhere, with no loose folds at the lower back, armpits or behind the knees, and no gaps at the neck, wrists or ankles. It should feel tighter on land than you expect.

    A wetsuit works by holding a thin layer of water against your skin. If it is loose, that water flushes through as you move and the suit stops doing its job, however thick it is. Sizing varies between manufacturers, so check the chart for the specific suit rather than assuming your size carries across.
    If most of your diving is UK inland and coastal, and especially if you want to dive through the winter, a drysuit is usually the more comfortable long-term answer.

    A wetsuit still makes sense if you dive mainly in warmer water, dive seasonally, or want something simpler and quicker to travel with. Plenty of divers own both. If you are weighing it up, come and talk it through rather than guessing from a chart.
    Rinse it in fresh water after every dive, turn it the right way out and hang it to dry on a wide hanger out of direct sunlight. Narrow hangers stretch the shoulders, and sunlight is what ages neoprene fastest.

    Avoid leaving it screwed up in a wet bag. Most wetsuits that die early die of storage rather than diving.