Dublin weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Fair
Best time to visit: June – September
What is the weather like in Dublin in May?
In May, Dublin is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 10.9 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 61 mm in total. All in all, May is a so-so month for a holiday in Dublin.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 15 h 49 min05:26 – 21:16
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 20 km/haverage daily peak
- Cloud cover
- 68 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/Dublin
How the score comes together
- Temperatureweight 50 %63 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 30 %36 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Dublin in May: quick answers
Is Dublin hot in May?
No. In May, Dublin is cool: daytime highs average 14 °C and nights drop to about 9 °C.
Can you swim in Dublin in May?
Only if you don't mind cold water: in May the sea averages just 10.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Dublin in May?
Rain is frequent, with about 13 rainy days and 61 mm in total.
Dublin month by month
The whole year in DublinAll destinations: IrelandWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)