Best time to visit Portstewart

Q: When is the best time to visit Portstewart?

The best time to visit Portstewart is May 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 warmest month in Portstewart?

The warmest time of year in Portstewart is normally July. Expect maximum daytime temperatures to reach 17°C.

Q: Which month has the most rain in Portstewart?

In terms of rainfall, October is usually the wettest month in Portstewart with 124mm on average. There are normally 22 days in October with some rain.

Q: When is it sunniest in Portstewart?

The sunniest time of year in Portstewart is normally May with bright sunshine on average for 35% of daylight hours; that's 6 hours of sunshine per day.

Q: When is the sea warmest in Portstewart?

The sea is usually at its warmest in Portstewart in September when the water temperature reaches 14°C.

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

Portstewart by month

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

Recommended for Northern Ireland

Skyscanner: Lowest flight prices by destination

Sale

Explore lowest airfares by destinations worldwide
Find the cheapest month or filter by route or month
Prices shown found on Skyscanner in last 8 days

Go to Skyscanner deal >>

View all Skyscanner offers

When is the best time to visit Portstewart?

The best time to visit Portstewart is May 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
Jun
1
Jul
1
Aug
0
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

7
Jan
7
Feb
9
Mar
11
Apr
13
May
16
Jun
17
Jul
17
Aug
15
Sep
13
Oct
9
Nov
8
Dec

Hours of Sunshine (daily)

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

Which is the warmest month in Portstewart?

The warmest time of year in Portstewart is normally July. Expect maximum daytime temperatures to reach 17°C.

Which month has the most rain in Portstewart?

In terms of rainfall, October is usually the wettest month in Portstewart with 124mm on average. There are normally 22 days in October with some rain.

When is it sunniest in Portstewart?

The sunniest time of year in Portstewart is normally May with bright sunshine on average for 35% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Portstewart?

The sea is usually at its warmest in Portstewart 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 (Portstewart) 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.