Sun River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Sun River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Sun River today is 12.1°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 |
|---|---|---|---|
| OCT 5 | 11.9°C | 13.3°C | |
| OCT 6 | 13.3°C | 13.3°C | |
| OCT 7 | 12.8°C | 13.3°C | |
| OCT 8 | 12.9°C | 13.3°C | |
| OCT 9 | 12.4°C | 13.3°C | |
| OCT 10 | 12.3°C | 13.3°C | |
| OCT 11 | 13.0°C | 13.3°C | |
| OCT 12 | 12.2°C | 13.3°C | |
| OCT 13 | 13.3°C | 12.2°C | |
| OCT 14 | 13.3°C | 12.2°C | |
| OCT 15 | 13.3°C | 12.3°C | |
| OCT 16 | 13.3°C | 12.3°C | |
| OCT 17 | 13.3°C | 12.4°C | |
| OCT 18 | 13.3°C | 12.5°C | |
| OCT 19 | 13.3°C | 12.5°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 | 1°C | 5°C | 9°C |
| February | 1°C | 5°C | 9°C |
| March | 1°C | 6°C | 11°C |
| April | 3°C | 10°C | 16°C |
| May | 6°C | 14°C | 21°C |
| June | 12°C | 18°C | 22°C |
| July | 15°C | 20°C | 24°C |
| August | 17°C | 20°C | 24°C |
| September | 11°C | 16°C | 21°C |
| October | 8°C | 13°C | 16°C |
| November | 3°C | 8°C | 16°C |
| December | 2°C | 6°C | 8°C |
Sun River: Water Temperature by Location
Sun River: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Source North Fork Sun River
• location Confluence of Open Creek and McDonald Creek, Lewis and Clark County
Mouth Missouri River
• location Great Falls, Cascade County
Length 130 mi (210 km)
The Sun River, flowing through central Montana, is a river that offers beautiful views and a cool, clear environment. The water temperature in the Sun River can be quite cold, particularly in its upper reaches where snowmelt from the surrounding mountains feeds into the flow. During the summer months, the temperature usually ranges between 50 and 60°F (10 to 16°C), making it suitable for a quick dip or wading, though it might feel a bit chilly for prolonged swimming. In the cooler months, the water temperature can drop further, making swimming uncomfortable or even dangerous.
While the Sun River is not as well known for swimming, it provides ample opportunities for other water-based activities like fishing, kayaking, and rafting. There are certain areas of the river, particularly in its slower sections or near local parks, where swimming or wading is possible. However, swimmers should exercise caution, as the current can be strong in some parts of the river, and the water quality can vary, particularly after heavy rainfall. Despite these factors, the Sun River remains a favorite for outdoor enthusiasts, offering a tranquil atmosphere and a great setting for exploring the natural beauty of Montana.