Portmarnock weather in May (Dublin County, Ireland)

How is the weather in Portmarnock in May? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.

In May, Portmarnock generally has moderate temperatures and moderate rainfall. Daytime temperatures hover around 15°C, while nights can cool down to about 9°C.

Portmarnock in May usually receives moderate rainfall, averaging around 66 mm for the month. Based on our climate data of the past 30 years, about 16 days of rain are anticipated.

The city usually sees around 188 hours of sunlight, indicating a moderately sunny period.

If your ideal day consists of dry skies and moderate temperatures July and August generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Portmarnock climate page with graphs.

 

Portmarnock, monthly averages in May

Min Temperature 9°C  

Max Temperature 15°C  

Water Temperature 10°C *  

Chance of Rain 53%  

Precipitation 66 mm  

Rainy days 16 days  

Humidity 68% *  

Windspeed 14 km/h *  

Sunshine 188 hours *  

Percentage Sunshine 42% *  

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

Where to go in Ireland in May

Find out more about the weather in Ireland in May and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Portmarnock in May?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay. With a water temperature of around 10°C there is no need to bring your swimwear.

What To Do

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

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

10/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Portmarnock.

Our site offers climate and forecast data for every country in the world. Are you going to Ireland? On this website you can find historical weather averages for many cities in Ireland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.