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 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.

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

Recommended for Northern Ireland

LateRooms.com: UK hotel chains deals & offers

Sale

Check out UK hotel chain deals with LateRooms.com
Book stays at Hilton, Novotel, Travelodge & beyond
Filter deals by type of hotel, type of stay & more

Go to LateRooms.com deal >>

View all LateRooms.com offers

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.

28
Londonderry
26
Belfast

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

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.

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.

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.

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.

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)

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.