The best time to visit Shetland is from late May to mid-July, when the weather is at its mildest and the days are exceptionally long.
During this period, you'll experience the "simmer dim," where daylight extends almost around the clock, with only a few hours of twilight. This allows for extended exploration of the islands' natural beauty, from dramatic cliffs to white sand beaches, and provides ample opportunity for wildlife spotting. The average daytime temperatures are generally comfortable, ranging from 10°C to 15°C, making it ideal for outdoor activities like hiking, cycling, and kayaking.
This window is particularly good for nature enthusiasts and those keen on birdwatching. Many migratory seabirds, including puffins, gannets, and kittiwakes, are present in large numbers, nesting at colonies such as Hermaness National Nature Reserve on Unst and Sumburgh Head at the southern tip of the mainland. The longer daylight hours mean you can visit these remote sites without feeling rushed.
For travellers interested in cultural events, the summer months also feature local agricultural shows and regattas, offering a glimpse into island life.