Environment Canada weather forecasts are broadcast by their own VHF Weatheradio stations as well as by Canadian Coast Guard Radio services on their VHF Continuous Marine Broadcasts and their Medium Frequency Single Sideband (MF-SSB) broadcasts.
Environment Canada's Weatheradio broadcasts, while of use to boaters who never stray far from home, are of limited value to cruising sailors who need a broader view of the weather situation. As is the case in the USA, Weatheradio is primarily for land-dwellers. The VHF weather transmitters on the island seem to experience frequent "Technical Difficulties", and may even transmit erroneous information. [In 2016, the French version on the Sydney (Victoria Junction) transmitter gave the Bras d'Or Lakes weather forecast for October 31, 2014 and weather conditions for some unknown date for most, if not all, of the summer season.] On top of that, Environment Canada, despite advising mariners to monitor the weather for adjacent areas, has cut back on the information transmitted and now only transmits weather forecasts for areas local to the transmitter.
CCGR transmits the Technical Synopsis, as well as forecasts for many areas in the locality of their transmitters. Canadian Coast Guard's mission is marine safety, and to that end their transmissions are generally reliable.