Jefferson River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Jefferson River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Jefferson River today is 14.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 |
|---|---|---|---|
| SEP 14 | 18.0°C | 17.6°C | |
| SEP 15 | 15.4°C | 17.6°C | |
| SEP 16 | 15.9°C | 17.6°C | |
| SEP 17 | 14.4°C | 17.6°C | |
| SEP 18 | 14.2°C | 17.6°C | |
| SEP 19 | 15.6°C | 17.6°C | |
| SEP 20 | 14.9°C | 17.6°C | |
| SEP 21 | 14.8°C | 17.6°C | |
| SEP 22 | 17.6°C | 14.9°C | |
| SEP 23 | 17.6°C | 15.1°C | |
| SEP 24 | 17.6°C | 15.2°C | |
| SEP 25 | 17.6°C | 15.4°C | |
| SEP 26 | 17.6°C | 15.5°C | |
| SEP 27 | 17.6°C | 15.6°C | |
| SEP 28 | 17.6°C | 15.8°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 | 5°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 12°C | 17°C | 22°C |
| July | 13°C | 19°C | 25°C |
| August | 16°C | 20°C | 24°C |
| September | 11°C | 18°C | 19°C |
| October | 5°C | 11°C | 16°C |
| November | 0°C | 8°C | 16°C |
| December | 1°C | 5°C | 8°C |
Jefferson River: Water Temperature by Location
Jefferson River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source:
• location Twin Bridges, Montana
Mouth Missouri River
• location Three Forks, Montana
Length 83 mi (134 km)
The Jefferson River, located in southwestern Montana, is a pristine waterway known for its clear waters and tranquil surroundings. Fed by mountain streams and snowmelt, the river’s temperature remains relatively cool for much of the year. In the spring and early summer, when snowmelt is at its peak, the water is typically between 45°F and 55°F (7°C to 13°C). By mid to late summer, the water warms to a more comfortable range of 60°F–70°F (15°C to 21°C), especially in slower-moving sections, making it more inviting for recreational activities.
Swimming in the Jefferson River is possible, particularly during the warmer summer months when the water temperature is more agreeable. However, the river is better known for activities like fly fishing, kayaking, and canoeing, thanks to its calm flow and abundant fish populations. For swimmers, there are a few accessible spots along the river where the water is shallow and calm, ideal for a refreshing dip. The Jefferson River’s scenic beauty and serene atmosphere make it a wonderful place to enjoy the outdoors, whether you’re in the water or simply relaxing along its banks.