Today 20th August:

It will be a dry and bright day with some good spells of sunshine, with winds mainly light. Orkney will cloud over later in the day with easterly winds starting to freshen. Maximum temperature 15 °C.

Tonight:

Shetland will stay dry with some evening sunshine then clear spells overnight. Orkney will be cloudy with some rain arriving in the early hours with fresh to strong easterly winds. Minimum temperature 10 °C.

Saturday 21st August:

Shetland dry in the morning, some sunshine in north, before the cloud and rain affecting Orkney slowly extends north. WInds easing over Orkney but turning murky and drizzly. Maximum temperature 16 °C.

Outlook for Sunday to Tuesday:

Saturday cloudy with some rain at times and fresh easterly winds. Damp start on Sunday then brightening up. Monday dry with some sunshine, though it may cloud over later. Information from The Met Office