Weather in Scilly is a significant concern as a holiday in Scilly is best appreciated out in the open air. The Islands boast amongst the mildest and warmest climate in the UK with a small variation between day and night temperatures. Often referred to as the sunshine isles, they benefit from more hours of sunshine than other regions - averaging 7.6 hours a day in July. However it is always comfortable and rarely muggy or humid due to the sea breeze.
Tides have an important influence on island life, determining whether deliveries can be made between the islands and whether people can travel to work on other islands. As a visitor you will find the tide also influences your activities, for instance, how long you will visit other islands for the day as the tide will alter the boat schedules and whether you get dropped off at a main quay or whether you get dropped on a beach (and sometimes have to paddle ashore!). During big Spring Tides, the channel between the islands can become almost dry and it is possible to walk between Tresco and Bryher (but check the boat time for your return unless you fancy a swim!).