When to visit
The best time to visit depends on your reasons for wanting come to the island.
Are you interested in birds, photography? Or perhaps you just want to get away from it all. If the latter then it's easy - any time is a good time! Although you may want to bear in mind that July and August are traditionally our busiest months so if you are looking for peace and quiet a visit in September or October is ideal.
Art/Photography
Bardsey is a magical place for inspiration whether it be painting, writing or photography and it's difficult to say one time of year is any better than another but there are a few things to take into consideration.
Long days mean plenty of time to get out an about although getting that early morning light does mean an early start. Spring and summer is when the island is at its most colourful with fresh green grass and swathes of gorse and squill. It's also a good time if you're into macro photography - lots of insects and flowers to photograph.