What was the farthest north that piracy took place in?

Whenever we think of piracy, we think of mainly the Caribbean. From the Late-1600s to the mid-1700s in The New World, piracy took place in Mexico, Belize, The Yucatan Peninsula, South America etc.... Piracy was also in The Carolinas, Georgia, Florida, Virginia, New England, New York, Louisiana, England, Ireland, Africa and Jamaica. The Cayman Islands as part of the Caribbean was full of pirates and salvage buccaneers including Blackbeard, Sir Henry Morgan and Sir Francis Drake. The furthest west that Drake's passage took place was into The Pacific Ocean and The East India Trading Company. In the Carolinas, The West Indies and Virginia, Native Americans and African slaves traded goods with European Colonists. In the latitude line of pirates, which includes The Caribbean, The Gulf of Mexico, Bermuda, Trinidad and Tobago, Dominican Republic, Cuba, The Florida Keys, The Bahamas and The USVI pirates traded with other African and British colonists sugar, rum, spices, loot, treasure and other goods with them. Boston as far as I know was the furthest north that British pirates set sail and privateers committed piracy off the coast of Cape Cod. What was the farthest north that piracy took place? Was it Nova Scotia, or Newfoundland? What was the coldest Ocean that piracy took place in?