What wetsuit do I need for UK waters?

UK water temperatures range from 6-8°C in winter to 15-18°C in summer. For summer kayaking, a 3mm full suit is usually sufficient. For winter or exposed conditions, a 5/4mm suit with hood, gloves and boots is recommended. Spring and autumn typically need a 4/3mm suit.

What do the two numbers in wetsuit thickness mean?

Numbers like 4/3mm mean the torso is 4mm thick and the arms/legs are 3mm thick. The torso area needs more insulation for your core, while thinner limb panels allow better flexibility for paddling. Some suits have a third number (e.g. 5/4/3mm) indicating different thicknesses in three zones.

When should I use a drysuit instead of a wetsuit?

Consider a drysuit when water temperature drops below 8°C, for extended immersion (sailing, kayaking in rough conditions), or for winter paddling. Drysuits keep you completely dry and allow thermal layers underneath. They are essential for serious cold-water kayaking in the UK from November to April.

How do I look after my wetsuit?

Rinse your wetsuit in fresh water after every use, especially in salt water. Hang it to dry inside-out, away from direct sunlight. Do not use a regular hanger — use a wide wetsuit hanger to prevent stretching. Store flat or on a hanger, never folded. Use wetsuit shampoo monthly.

CampCalcs

Wetsuit Thickness Calculator

Find the right wetsuit thickness based on water temperature and activity duration.

Water Temperature

Temperature for this process

Session Duration

Duration of the process

Activity

Enter the activity

Wind Exposure

Enter the wind exposure

How We Calculate This

Temperature Adjustment

Effective temp = Water temp - Activity adjustment - Wind adjustment - Duration adjustment

Thickness Guide

20°C+: 2mm shorty. 16-20°C: 3mm full. 12-16°C: 4/3mm. 8-12°C: 5/4mm (+ accessories). Below 8°C: 6/5mm or drysuit.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify conditions and use proper safety equipment outdoors.