When considering a trip to Unst, the best time to go is generally between May and August, when the weather is at its mildest and the daylight hours are longest.
This period offers the most comfortable conditions for exploring the island's natural beauty and wildlife. You'll experience long daylight hours, often stretching well into the evening, which is great for extended walks and spotting birds. The average temperatures during these months are typically between 10°C and 15°C, making outdoor activities more pleasant.
Birdwatchers, in particular, will find May to July ideal. This is the prime breeding season for many species, and you'll have the best chance of seeing puffins, gannets, and other seabirds at their nesting sites, such as the Hermaness National Nature Reserve. The reserve offers well-maintained paths leading to impressive cliff-top views.
For those planning to enjoy the island's walking trails and coastal scenery, August is an excellent choice. The weather remains relatively mild, and the heather on the moors is often in full bloom, adding a splash of colour to the landscape.