The best time to go to Leixlip is typically during the late spring and summer months, from May to September, when the weather is mildest and there are more daylight hours.During these months, the average temperatures are comfortable, ranging from 15°C to 20°C, making it pleasant for exploring the town and its surroundings. You'll find it ideal for activities like walking along the River Liffey, visiting Leixlip Castle, or enjoying the grounds of Castletown House. The longer daylight hours also mean more time for sightseeing and enjoying the local pubs and restaurants in the evenings.For those who prefer a quieter experience and don't mind cooler temperatures, late April or early October can also be good options. While the weather might be a bit more unpredictable, you'll encounter fewer crowds at popular attractions, and accommodation prices might be slightly lower.