Gallatin River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Gallatin River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Gallatin River today is 23.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 22.7°C | 20.1°C | |
| AUG 5 | 21.7°C | 20.1°C | |
| AUG 6 | 21.8°C | 20.1°C | |
| AUG 7 | 22.5°C | 20.1°C | |
| AUG 8 | 22.5°C | 20.1°C | |
| AUG 9 | 22.7°C | 20.1°C | |
| AUG 10 | 22.6°C | 20.1°C | |
| AUG 11 | 22.9°C | 20.1°C | |
| AUG 12 | 20.1°C | 23.0°C | |
| AUG 13 | 20.1°C | 22.9°C | |
| AUG 14 | 20.1°C | 22.7°C | |
| AUG 15 | 20.1°C | 22.6°C | |
| AUG 16 | 20.1°C | 22.4°C | |
| AUG 17 | 20.1°C | 22.3°C | |
| AUG 18 | 20.1°C | 22.1°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 5°C | 9°C |
| February | 0°C | 5°C | 9°C |
| March | 0°C | 6°C | 11°C |
| April | 4°C | 11°C | 16°C |
| May | 7°C | 14°C | 21°C |
| June | 12°C | 17°C | 22°C |
| July | 13°C | 19°C | 24°C |
| August | 17°C | 20°C | 24°C |
| September | 11°C | 18°C | 19°C |
| October | 6°C | 11°C | 16°C |
| November | 0°C | 9°C | 16°C |
| December | 1°C | 5°C | 8°C |
Gallatin River: Water Temperature by Location
Gallatin River: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
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.