Most of the outages are in the Halifax region.
As of 7 a.m. AT, more than 50,000 Nova Scotia Power customers were in the dark.
The outages and high winds have prompted the cancellation of Marine Atlantic ferries Monday between Newfoundland and Nova Scotia. Also, there are several school closures in the Halifax region and in the Strait region.
Heavy rainfall warnings remain in effect for much of eastern Nova Scotia and there are wind warnings for eastern mainland Nova Scotia, Cape Breton and Newfoundland.
Strong winds of up to 90 km/h in parts of eastern mainland Nova Scotia and Cape Breton, and up to 120 km/h for much of Newfoundland, have prompted warnings from Environment Canada.
"Damage to buildings, such as to roof shingles and windows, may occur. Loose objects may be tossed by the wind and cause injury or damage. Be prepared to adjust your driving with changing road conditions due to high winds," said Environment Canada in a news release.
Snowfall warnings are in effect for Labrador City, Wabush and the Churchill falls area.
Nova Scotia's Emergency Management Office has also issued safety warnings.
"This weather event is not expected to be on the scale of post-tropical storm Arthur, but in its wake with tree-root systems already weakened, we could experience a large number of trees falling on power lines causing power outages and other damage," said Mark Furey, minister responsible for the Emergency Management Office in a statement Sunday.
"I encourage all Nova Scotians to listen to advisories, prepare for possible power outages, check on your neighbours and those most vulnerable in your communities, and take every precaution to minimize damage."