The best time to go to the Isle of Canna is during the summer months, from June to August, for the most pleasant weather and longest daylight hours.
During this period, the island experiences milder temperatures and typically less rainfall, making it ideal for outdoor activities like walking, wildlife spotting, and exploring the island's natural beauty. The longer days mean more time to enjoy the scenery, including the dramatic sea cliffs and the Canna Harbour.
Birdwatchers will find June and July particularly rewarding, as this is when many seabirds, including puffins, are nesting on the cliffs of Canna and its smaller neighbour, Sanday. You'll have excellent opportunities to observe them from accessible viewpoints. This time of year is also superb for those interested in botany, as the island's wildflowers are in full bloom.
While the summer offers the best conditions, it's worth noting that Canna's weather can be unpredictable at any time of year.