Portmarnock Weather in July

Portmarnock in July sees pleasant temperatures, with highs around 19°C (66°F) and overnight lows of 13°C (55°F). Rainfall is fairly high at around 79 mm (3.1 in) on average, so pack waterproofs just in case.

Rainfall in Portmarnock in July

Typically, you can expect about 14 days of rain this month, with 79 mm (3.1 in) on average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Portmarnock in July

Daytime temperatures in Portmarnock reach 19°C (66°F) in July, dropping to 13°C (55°F) at night. July marks the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it is the month with the highest temperature of the year.

Sunshine in Portmarnock in July

You can expect a moderate amount of sunlight, with approximately 166 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Portmarnock in July

In July, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in July

At 14°C (57°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Portmarnock.

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For a detailed overview over the year and the best time to visit Ireland, check out our Portmarnock's climate page.

Portmarnock Temperature in July

Min Temperature 13°C (55°F)  

Max Temperature 19°C (66°F)  

Water Temperature 14°C (57°F) *  

Chance of Rain 46%  

Precipitation 79 mm (3.1 in)  

Rainy days 14 days  

Humidity 69% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 166 hours *  

Percentage Sunshine 32% *  

* Data from: Dublin, Ireland (7 KM, 4 Miles).

What to Wear in Portmarnock in July

Comfortable temperatures call for an easy wardrobe in July. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 14°C (57°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Portmarnock in July

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Portmarnock's climate page.

More climate data for Portmarnock

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Portmarnock climate overview or explore weather in Ireland.