What is the best time to visit Isle of May National Nature Reserve?

The best time to visit Isle of May National Nature Reserve is from early April through the end of September. This is when you can see breeding seabirds, including puffins, razorbills, kittiwakes, and guillemots. The reserve remains closed over winter to protect the large number of seal pups born around its shores. May and June are the best months to see breeding seabirds, which number up to a quarter of a million at the peak of breeding season.