It never gets brutally cold -- average winter temperature is about 41 degrees Fahrenheit (5-6C). But it also never gets particularly warm. The average summer temperature is 59 to 61 degrees Fahrenheit (15C). Sea fog and mist is common in the summer with some parts of the island experiencing more than others.
Water temperature ranges from about 17F in winter to 55F in summer. Ordinary swimming is not on the cards, but surfers and divers wearing wet suits find the summer water temperature manageable.
It's about that wind!The main seasonal difference on Orkney is the wind and rain. Orkney is one of the windiest places in the United Kingdom with gale force winds recorded in low-lying areas at least 30 days per year.
Winter is the windiest and the wettest time of year although there is very little snow.