Which is the hottest month in Northern Ireland?

The hottest time of year in Belfast, Northern Ireland is normally July. Expect maximum daytime temperatures to reach 18°C.

Best time to visit Northern Ireland

Q: When is the best time to visit Northern Ireland?

The best time to visit Northern Ireland (Belfast) 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 Northern Ireland?

In terms of rainfall, January is usually the wettest month in Belfast, Northern Ireland with 101mm on average. There are normally 20 days in January with some rain.

Q: When is it sunniest in Northern Ireland?

The sunniest time of year in Belfast, Northern Ireland is normally May with bright sunshine on average for 37% of daylight hours; that's 6 hours of sunshine per day.

Q: When is the sea warmest in Northern Ireland?

The sea is usually at its warmest in Belfast, Northern Ireland in September when the water temperature reaches 14°C.

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

Northern Ireland by month

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

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Top Northern Ireland destinations

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

18
Belfast
17
Londonderry

All Northern Ireland destinations

When is the best time to visit Northern Ireland?

The best time to visit Northern Ireland (Belfast) 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
Mar
1
Apr
1.5
May
1.5
Jun
1.5
Jul
1.5
Aug
0.5
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

7
Jan
7
Feb
9
Mar
11
Apr
14
May
17
Jun
18
Jul
18
Aug
16
Sep
13
Oct
9
Nov
8
Dec

Hours of Sunshine (daily)

2
Jan
2
Feb
3
Mar
5
Apr
6
May
6
Jun
5
Jul
5
Aug
4
Sep
3
Oct
2
Nov
1
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Northern Ireland (Belfast) 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 Northern Ireland

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

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

Northern Ireland travel guide - essential info

Below is a beginner's guide to Northern Ireland 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.

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

Why visit Northern Ireland?

Considering a holiday to the Northern Ireland? 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

Travelling to Northern Ireland?
Hotels Car hire eSIMs

Northern Ireland travel guidance

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

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

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

Northern Ireland travel health

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

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

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

Note: CDC - Centers for Disease Control and Prevention

Northern Ireland travel features

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

We don't currently have any travel features on Northern Ireland. Discover more about holiday destinations around the world with this selection of general travel articles.

Northern Ireland FAQs

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

Which month has the most rain in Northern Ireland?

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

When is it sunniest in Northern Ireland?

The sunniest time of year in Belfast, Northern Ireland 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 Northern Ireland?

The sea is usually at its warmest in Belfast, Northern Ireland in January when the water temperature reaches 0°C.

What is the time difference between Northern Ireland and the UK?

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

What is the main language spoken in Northern Ireland?

The main language spoken in Northern Ireland is English.

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

What is the currency in Northern Ireland?

The currency in Northern Ireland is the Pound Sterling (GBP).

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Which plugs are used in Northern Ireland?

Northern Ireland uses electrical plug type G (230 Volts).

Which side of the road do they drive on in Northern Ireland?

They drive on the left side of the road in Northern Ireland.

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

Northern Ireland travel deals

Holidays to Northern Ireland

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