Which is the hottest month in Portstewart?

The hottest time of year in Portstewart is normally July. Expect maximum daytime temperatures to reach 18°C.

Which month has the most rain in Portstewart?

In terms of rainfall, January is usually the wettest month in Portstewart with 101mm on average. There are normally 20 days in January 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 37% 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 Portstewart

Q: When is the best time to visit Portstewart?

The best time to visit Portstewart, Northern Ireland is in May Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 8 hours or more.

The best time to visit Portstewart, Northern Ireland is in May based on our default weather conditions. Update your weather preferences to see which months best match.

Portstewart by month

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

Recommended for Northern Ireland

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When is the best time to visit Portstewart?

The best time to visit Portstewart, Northern Ireland is in May based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 8 hours or more [remove]

Change the criteria to reflect your weather preferences.

0
Jan
0.5
Feb
1
Mar
1.5
Apr
2
May
1.5
Jun
1.5
Jul
1.5
Aug
1
Sep
0.5
Oct
0.5
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

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)