The best time to go to Raheny for pleasant weather and outdoor activities is generally during the late spring and summer months, from May to September.
During these months, you'll experience milder temperatures, with average highs ranging from 15°C to 20°C, and longer daylight hours. This makes it ideal for exploring St. Anne's Park, which is a major draw in Raheny, offering extensive walking trails, gardens, and recreational facilities. The longer days also allow for more time to enjoy the coastal areas nearby, such as Bull Island and Dollymount Strand.
For those interested in local events and a lively option, July and August are particularly good. While not a bustling tourist hub, Raheny benefits from Dublin's summer calendar of events, and you'll find more opportunities for outdoor dining and community gatherings. However, this is also peak tourist season for Ireland, so you might encounter slightly higher prices for flights and accommodation, though Raheny itself tends to be less crowded than central Dublin.
If you prefer a quieter visit and don't mind cooler weather, April and October can also be good options.