The service, run by CalMac on behalf of Transport Scotland, will operate three times a week from Ardrossan to Campbeltown, with an extra stop at Brodick, on Arran, on Saturday.
Whiting Bay Hall and Auchrannie Spa and Country House, in Brodick on Arran, are open for residents with power, heat and refreshments, while Lamlash fire station is also open all day with power available through a local generator.