The best time to visit Rathlin Island is from May to September. This period offers the most favourable weather conditions and the best opportunities for wildlife watching.The puffins, which are a major draw for visitors, are typically present on the island from April to July. During these months, you'll have the best chance to see them at the RSPB Seabird Centre at the West Lighthouse. The warmer weather also makes exploring the island's walking trails and enjoying boat trips more pleasant.For those interested in the island's natural beauty and wildlife, May and June are particularly good as the seabird colonies are at their peak.