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 Portstewart

Q: When is the best time to visit Portstewart?

The best time to visit Portstewart is July and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C.

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Portstewart by month

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When is the best time to visit Portstewart?

The best time to visit Portstewart is July and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]

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Max Day Temperature (°C)

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Best time to visit

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Daytime temperature

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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)