Sidney, BC, is in for a stretch of sunny and hot weather this week, with highs reaching 25 degrees Celsius and a humidex making it feel closer to 30. Environment Canada forecasts clear skies and warm temperatures from Wednesday, August 5, through Monday, August 10, 2026.
Wednesday is expected to be the hottest day, with a high of 25 degrees, though areas near the shore may feel cooler as onshore winds bring temperatures down to around 20 degrees. The Environment Canada forecast also calls for hazy sunshine and a humidex of 28, making it feel quite muggy.
The UV index is forecast to reach 8, or very high, on Wednesday and Thursday. That means sunburns can happen quickly, and residents should take precautions. Health officials recommend using sunscreen with an SPF of at least 30, wearing a wide-brimmed hat, sunglasses, and protective clothing, and seeking shade during midday hours, according to the Government of Canada’s sun safety guidelines.
After Wednesday, the heat will ease a bit, with daytime highs settling into the low 20s and overnight lows dipping to around 13 or 14 degrees. Skies are expected to stay mostly clear, making it a great week for outdoor activities on the Saanich Peninsula. The region is known for beaches, kayaking, hiking, and day trips to the Gulf Islands, as noted by local tourism groups
While no weather alerts are in effect, it is worth noting that summer 2026 has been warmer than normal across British Columbia. The BC Wildfire Service reports that long-term dry conditions have led to above-average drought on Vancouver Island, so residents and visitors should remain careful with any activities that could spark a fire.
August is usually the warmest month in the Sidney area, with average highs around 22 degrees and lows around 12. This week’s forecast is right in line with those typical temperatures, giving locals and visitors a chance to enjoy the best of Vancouver Island summer.
