Gallatin River

© By Mike Cline

Gallatin River Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in Gallatin River, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature in Gallatin River: General Trends and Swimming Opportunities

Source Gallatin Range,
• location Wyoming,Gallatin Lake,Three Rivers Peak
Mouth Missouri River
• location Montana
Length 120 mi (190 km)

The Gallatin River, flowing through Montana and Yellowstone National Park, is a cold and fast-moving river that reflects its mountain origins. Fed by snowmelt and mountain springs, the river’s water temperature stays quite cool throughout the year. In spring and early summer, the river is often icy, with temperatures ranging from 40°F to 50°F (4°C to 10°C). By late summer, as the flow slows and air temperatures rise, the water can warm slightly to around 55°F–65°F (13°C–18°C), especially in calmer stretches.

Swimming in the Gallatin River is not very common due to its cold water, swift currents, and rugged terrain. The river is better known for fly fishing, whitewater rafting, and kayaking, which attract outdoor enthusiasts from around the country. For those seeking to cool off, brief wading or dipping in slower-moving sections during summer can be refreshing, but caution is advised due to the strong currents and variable depths. The Gallatin River’s beauty and untamed character make it a destination for adventure rather than leisurely swimming.

Geographical Location of Gallatin River

Frequently Asked Questions About Gallatin River and its Water Temperatures