What Wetsuit Do I Need Today?

Choosing the right wetsuit isn’t just about the season. A sunny spring day can still have icy water, while a windy summer afternoon can leave you colder than a calm autumn session. The best wetsuit depends on several factors working together.

The Complete Picture

At North Coast Wetsuits, we always recommend looking at the complete picture before heading out. Water temperature, air temperature, wind strength, how long you’ll be in the water and the type of activity you’re doing all affect how warm you’ll stay.

The Four Things That Matter Most

1. Sea Temperature

Water temperature is the biggest factor when choosing a wetsuit.

Unlike air, water removes heat from your body incredibly quickly. Even on a warm summer day, UK sea temperatures can remain surprisingly cold.

Click the image link below to get an idea of UK seasonal water temperature.

How Warm Is the Sea UK Seasonal Water Temperature Checker

As a rough guide:

Below 8°C – 5/4mm or 6/5mm winter wetsuit with boots, gloves and hood.
8–12°C – 5/4mm winter wetsuit with boots.
12–15°C – 4/3mm wetsuit, possibly with boots depending on location.
15–18°C – 3/2mm full wetsuit.
18°C+ – 2mm wetsuit, shorty or even boardshorts for experienced riders.

Find out more about wetsuit thickness relative to water and air temperature by clicking the image link above.

2. Air Temperature

A warm, sunny day doesn’t automatically mean you need a thinner wetsuit.

If the sea is still cold after winter, you’ll spend most of your session losing heat to the water rather than gaining warmth from the air.

Likewise, a cold winter day with bright sunshine can often feel more comfortable than a cloudy summer day with a cold wind.

3. Wind Strength

Wind dramatically increases heat loss, especially once you’re out of the water.

**Wind strength plays a big part in how ocean conditions can feel**

Strong offshore or cross-shore winds can make changing after your session miserable if you’re underdressed.

Wind also affects different sports differently. Surfers spend more time immersed, while wing foilers and windsurfers are exposed to the wind for much of the session.

4. Your Activity

Different sports require different wetsuits.

Surfing

Surfers spend long periods sitting in cold water waiting for waves. Warmth should be prioritised.

Paddle Boarding

You’ll generally spend less time immersed, so a thinner wetsuit is often more comfortable. Flexibility can be just as important as insulation.

**Click the image link below to get an idea of how the ocean may appear on your chosen day**

Wing Foiling

Wing foiling is surprisingly physical. Once moving you’ll generate plenty of heat, but the wind chill can still be significant. Many riders choose a wetsuit that’s one step thinner than they would wear surfing.

Windsurfing

Similar to wing foiling, windsurfers generate body heat while sailing but remain exposed to cooling winds.

Kayaking & Canoeing

Depending on the conditions, paddlers often benefit from flexible wetsuits or layered systems that prioritise comfort and freedom of movement.

Summer Sunshine is for Surfskating (When the Surf's Flat) #1 — **Seasonal conditions make a big difference**

UK Seasonal Guide

Winter (December–March)

Sea temperatures are typically at their coldest.

Recommended:

5/4mm or 6/5mm wetsuit
Boots
Gloves
Hood

Spring (April–May)

Air temperatures rise quickly but the sea often remains cold.

Recommended:

5/4mm or warm 4/3mm
Boots for most people

Summer (June–August)

The warmest water of the year.

Recommended:

3/2mm
2mm
Shorty depending on conditions

Autumn (September–November)

Many watersports enthusiasts consider autumn the best season. The sea retains summer warmth while air temperatures remain comfortable.

Recommended:

3/2mm moving towards 4/3mm later in the season.

Don’t Forget Your Personal Cold Tolerance

Everyone feels the cold differently.

Kids Wetsuits: 7 Great Reasons to Choose North Coast Wetsuits #2 — **Even in summer, some may still need a thicker wetsuit (kids especially)**

Your ideal wetsuit thickness depends on:

Age
Body size
Fitness
Experience
Time spent in the water
Whether you naturally feel the cold

If you’re unsure, it’s usually better to be slightly too warm than dangerously cold.

Cold Shock Is a Real Risk

Even experienced watersports enthusiasts can experience cold shock when entering unexpectedly cold water.

https://www.youtube.com/watch?v=eKMiijW7xlA

Cold Water Shock: Expert Insights (https://www.youtube.com/watch?v=eKMiijW7xlA)

Cold shock can cause:

Uncontrolled gasping
Rapid breathing
Panic
Reduced swimming ability

Always check the latest sea conditions before entering the water. If you’re in any doubt about the conditions or your equipment, don’t go out.

Use Live Conditions, Not Guesswork

Weather apps only tell part of the story.

For the best wetsuit recommendation, check:

Which Wetsuit Do I Need? Chhose Your Wetsuit in Under 1 Minute #1 — **What you get on the ground could be slightly different to what you perceived**

Combining these gives you a far more accurate idea of what you’ll need than simply looking outside the window.

North Coast Wetsuits Can Help

Whether you’re surfing, paddle boarding, wing foiling, kayaking or windsurfing, choosing the right wetsuit makes every session safer, warmer and more enjoyable.

Use the free North Coast Wetsuits Ocean Intelligence Lab tools to check live sea temperatures, weather and conditions before every session, then use our Wetsuit Finder (click the image link below) to discover the ideal wetsuit for today’s conditions.

Which Wetsuit Do I Need Chhose Your Wetsuit in Under 1 Minute

If you’re still unsure, get in touch with our friendly team. We’ve been helping UK watersports enthusiasts stay warm for years and we’re always happy to point you in the right direction.

Frequently Asked Questions

Is a 4/3 wetsuit warm enough in the UK?

For much of spring, autumn and cooler summer days, yes. During winter, most people will prefer a 5/4mm wetsuit.

Can I surf in a 3/2 wetsuit?

Yes, during warmer months or in southern UK waters, but it may be too cold during spring and winter.

Is a thicker wetsuit always better?

Not necessarily. A wetsuit that’s too thick can restrict movement and cause overheating. The aim is to find the right balance between warmth and flexibility.