Coastal regions defy simple categorization. Vancouver and Victoria experience a unique microclimate. Summer there feels long—often starting in early May with dry, sunny days and stretching into a very mild October. However, the ocean moderates temperatures, meaning true heat waves are rare. In contrast, Atlantic Canada (Halifax, St. John’s) has a shorter, cooler, and foggier summer, often delayed by sea ice and cold currents. True swimming weather may not arrive until mid-July and can fade by late August, offering barely two months of reliable summer.
In Vancouver and Victoria, summer is mild and dry. It typically starts in late June and stretches comfortably into late September. 20°C to 25°C (68°F to 77°F). The Vibe: Low humidity and very little rain. The Prairies (Alberta, Saskatchewan, Manitoba) how long is summer in canada
Here's a breakdown of the average summer length in different parts of Canada: Coastal regions defy simple categorization