Hour 4 of Ottawa Now for Fri. July 17th, 2026

Sunscreen is key to protecting yourself from sunburns, skin cancer and visible skin aging, but it isn’t a one-and-done process. Health Canada advises using a broad-spectrum sunscreen with a minimum SPF (sun protection factor) of 30 at least 15 minutes before going outside and reapplying every two hours during sun exposure. While that’s a good general rule of thumb, there are other factors to take into consideration. So, how often should you be reapplying throughout the day? Maybe not as much as you think. “There have been papers that show that if you’re sitting under a tree and not...