Dun Laoghaire Weather in May
May in Dun Laoghaire brings moderate temperatures around 15°C (59°F) during the day, dropping to 9°C (48°F) at night, with quite a bit of rainfall expected, averaging around 68 mm (2.7 in) for the month.
Rainfall in Dun Laoghaire in May
Climate statistics over the past 30 years suggest around 16 days of rain, with 68 mm (2.7 in) average for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Dun Laoghaire in May
May in Dun Laoghaire brings typical temperatures with highs around 15°C (59°F) and lows of 9°C (48°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Dun Laoghaire in May
The month brings about 188 hours of sunlight, offering a comfortable mix of sun and overcast.
Wind Speed in Dun Laoghaire in May
In May, 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 May
The water sits at 10°C (50°F) this month, which is well below what most people consider swimmable. Wetsuits help, but expect it to still feel cold.For Dun Laoghaire itself, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dun Laoghaire's climate page.
Dun Laoghaire Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
15°C (59°F)
Water Temperature
10°C (50°F) *
Chance of Rain
53%
Precipitation
68 mm (2.7 in)
Rainy days
16 days
Humidity
68% *
Windspeed
4 m/s (8 knots) *
Sunshine
188 hours *
Percentage Sunshine
42% *
Best Places in Ireland in May
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in May →
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What to Wear in Dun Laoghaire in May
The weather can swing between comfortable and chilly in May, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 10°C (50°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Dun Laoghaire in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dun Laoghaire's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Dun Laoghaire climate overview or explore weather in Ireland.
