Which is the hottest month in Wales?

The hottest time of year in Cardiff, Wales is normally July. Expect maximum daytime temperatures to reach 20°C.

Best time to visit Wales

Q: When is the best time to visit Wales?

The best time to visit Wales (Cardiff) is June, July and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which month has the most rain in Wales?

In terms of rainfall, December is usually the wettest month in Cardiff, Wales with 109mm on average. There are normally 19 days in December with some rain.

Q: When is it sunniest in Wales?

The sunniest time of year in Cardiff, Wales is normally August with bright sunshine on average for 41% of daylight hours; that's 6 hours of sunshine per day.

Q: When is the sea warmest in Wales?

The sea is usually at its warmest in Cardiff, Wales in August when the water temperature reaches 18°C.

Find the best time to visit Wales and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Wales by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Top Wales destinations

Below are the temperatures expected today at popular countries, regions and places in Wales. Select a destination to compare today's forecast with average weather conditions.

All Wales regions

Pembrokeshire

All Wales destinations

When is the best time to visit Wales?

The best time to visit Wales (Cardiff) is June, July and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0
Jan
0
Feb
0.5
Mar
1
Apr
1.5
May
3
Jun
3
Jul
3
Aug
1.5
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

7
Jan
7
Feb
10
Mar
12
Apr
16
May
19
Jun
20
Jul
20
Aug
18
Sep
14
Oct
10
Nov
8
Dec

Hours of Sunshine (daily)

2
Jan
3
Feb
4
Mar
5
Apr
6
May
7
Jun
6
Jul
6
Aug
5
Sep
3
Oct
2
Nov
2
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Wales (Cardiff) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about Wales

Explore our complete guide to Wales with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for Wales.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

Wales travel guide - essential info

Below is a beginner's guide to Wales with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

Wales - quick facts
Time difference	UK +0 hours
Language(s)	English
Currency	Pound Sterling
Electricity	G plug (230V)
Driving side	Left

Why visit Wales?

Considering a holiday to the Wales? Here are some of the very good reasons it makes such a wonderful holiday destination be it for culture or nature to ensure you get the most out of your 2025/2026 escape.

Culture
Nature

Wales tourist information

Visit Wales

Travelling to Wales?
Hotels Car hire eSIMs

Wales travel guidance

Check the latest travel guidance and advice on visiting Wales from official government sources (in english) from around the world including entry requirements and travel restrictions.

Irish traveller advice for Wales - Department of Foreign Affairs, Ireland
Canadian travel advice for Wales - Government of Canada
US travel advisories for Wales - US Department of State
Safe travel advisories for Wales - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for Wales - Department of Foreign Affairs, Australia

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around Wales.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

Wales travel health

Find out more about staying safe when travelling to Wales with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for Wales - CDC
Health & vaccinations for Wales - TravelHealthPro, NaTHNac
How to stay safe & healthy in Wales - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in Wales, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

Wales travel features

Do you want to learn more about Wales? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Wales.

Why Snowdonia should be your next big adventure

Wales FAQs

Read our frequently asked questions about travelling to Wales including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in Wales?

In terms of rainfall, January is usually the wettest month in Cardiff, Wales with 0mm on average. There are normally no days in January with some rain.

When is it sunniest in Wales?

The sunniest time of year in Cardiff, Wales is normally January with bright sunshine on average for 0% of daylight hours; that's 0 hours of sunshine per day.

When is the sea warmest in Wales?

The sea is usually at its warmest in Cardiff, Wales in January when the water temperature reaches 0°C.

What is the time difference between Wales and the UK?

The time difference between Wales and the UK is UK time+0 hours.

What is the main language spoken in Wales?

The main language spoken in Wales is English.

Learn a language for Wales with Rosetta Stone^*, Busuu^* and Rocket Languages^*.

What is the currency in Wales?

The currency in Wales is the Pound Sterling (GBP).

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Which plugs are used in Wales?

Wales uses electrical plug type G (230 Volts).

Which side of the road do they drive on in Wales?

They drive on the left side of the road in Wales.

Find out more about driving in UK with International Drivers Association^*.

Wales travel deals

Holidays to Wales

Check out the latest deals, discount codes and special offers on holidays to Wales in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.