Marias River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Marias River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Marias River today is 16°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 14.4°C | 15.8°C | |
| SEP 15 | 14.7°C | 15.8°C | |
| SEP 16 | 15.3°C | 15.8°C | |
| SEP 17 | 13.8°C | 15.8°C | |
| SEP 18 | 13.2°C | 15.8°C | |
| SEP 19 | 13.7°C | 15.8°C | |
| SEP 20 | 13.9°C | 15.8°C | |
| SEP 21 | 16.0°C | 15.8°C | |
| SEP 22 | 15.8°C | 16.0°C | |
| SEP 23 | 15.8°C | 16.0°C | |
| SEP 24 | 15.8°C | 16.0°C | |
| SEP 25 | 15.8°C | 16.0°C | |
| SEP 26 | 15.8°C | 16.0°C | |
| SEP 27 | 15.8°C | 15.9°C | |
| SEP 28 | 15.8°C | 15.9°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 | 2°C | 9°C | 16°C |
| May | 7°C | 14°C | 21°C |
| June | 14°C | 19°C | 22°C |
| July | 17°C | 21°C | 25°C |
| August | 17°C | 21°C | 25°C |
| September | 11°C | 16°C | 21°C |
| October | 8°C | 13°C | 17°C |
| November | 3°C | 8°C | 16°C |
| December | 2°C | 5°C | 8°C |
Marias River: Water Temperature by Location
Marias River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
The Marias River, located in northwestern Montana, is a tributary of the Missouri River and flows through a largely rural and scenic area. The water temperature in the Marias River can fluctuate significantly throughout the year, with colder temperatures during the spring and fall, often dipping below 50°F (10°C). During the summer months, the temperature rises to more comfortable levels, typically ranging from 60°F to 70°F (15°C to 21°C), especially in areas with slower-moving water.
Swimming in the Marias River is possible but not a widespread activity. While the water can be refreshing during the hot summer months, the river's flow can be quite variable, with some sections being fast and others calm. Swimmers can enjoy the calmer stretches of the river, but caution is advised in areas with faster currents. The Marias River is more commonly used for fishing, kayaking, and canoeing, as its scenic surroundings and relatively peaceful flow make it ideal for these activities. Although swimming may not be the primary attraction, visitors can still enjoy the river's natural beauty and tranquility during the summer months.