Today 19th of August:

A good deal of dry and fairly bright weather with a few sunny intervals. The chance of one or two brief passing showers. Winds a light to moderate northerly. Maximum temperature 16 °C.

Tonight:

Apart from the odd very isolated light shower it will be a dry evening and night with sunny then clear intervals. Winds falling light. Minimum temperature 9 °C.

Friday 20th August:

It will be a dry and bright day with some good sunny spells, WInds will be mostly light but freshening easterly winds will reach Orkney in the evening. Maximum temperature 15 °C.

Outlook for Saturday to Monday:

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