Water temperature can completely change a day of Bow River fly fishing. From slow winter afternoons to early-morning summer feeding windows, understanding how temperature influences trout behaviour can help you choose when, where, and how to fish. Here’s how Bow River anglers can use a thermometer, seasonal temperature trends, and a little trout behaviour to find better feeding windows while protecting the fishery.

Water clarity can change how trout see, track, and respond to your fly. This guide explains how to adjust fly size, colour, contrast, movement, and weight for clear, stained, and murky Bow River conditions—helping Calgary anglers make smarter fly choices and spend less time guessing on the water.