Roosevelt Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Roosevelt Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Roosevelt Lake today is 16.9°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 | 19.2°C | 20.1°C | |
| SEP 15 | 18.9°C | 20.1°C | |
| SEP 16 | 18.0°C | 20.1°C | |
| SEP 17 | 17.1°C | 20.1°C | |
| SEP 18 | 16.6°C | 20.1°C | |
| SEP 19 | 17.2°C | 20.1°C | |
| SEP 20 | 16.8°C | 20.1°C | |
| SEP 22 | 20.1°C | 17.1°C | |
| SEP 23 | 20.1°C | 17.2°C | |
| SEP 24 | 20.1°C | 17.4°C | |
| SEP 25 | 20.1°C | 17.5°C | |
| SEP 26 | 20.1°C | 17.7°C | |
| SEP 27 | 20.1°C | 17.9°C | |
| SEP 28 | 20.1°C | 18.0°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 | 1°C | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 4°C |
| April | 1°C | 6°C | 10°C |
| May | 6°C | 13°C | 19°C |
| June | 14°C | 21°C | 27°C |
| July | 18°C | 23°C | 27°C |
| August | 21°C | 25°C | 28°C |
| September | 17°C | 20°C | 24°C |
| October | 6°C | 12°C | 18°C |
| November | 3°C | 7°C | 11°C |
| December | 0°C | 4°C | 7°C |
Roosevelt Lake: Water Temperature by Location
Roosevelt Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Roosevelt Lake in Minnesota follows the seasonal pattern typical of inland lakes in the region. Surface water is near freezing under ice in winter, roughly 32°F (0°C) or slightly below under packed ice. Spring thaw brings temperatures up to about 40–55°F (4–13°C) through May and early June. In midsummer surface temperatures commonly range from about 65–75°F (18–24°C), and shallow bays on hot sunny days can briefly approach 80°F (27°C), while deeper water remains much cooler—often 50–60°F (10–15°C). By early fall the lake cools back into the 50s°F (10–15°C) and drops toward freezing again as ice forms.
Swimming is generally possible and commonly done during the warm months when surface temperatures are comfortable, but access and safety depend on local conditions. Public access points and shorelines are used for swimming unless signs or advisories prohibit it; closures can occur for reasons such as high bacteria counts, harmful algal blooms, or unsafe weather. Ice cover in winter makes open-water swimming unsafe except for organized, properly supported cold-water events. Even in summer swimmers should be aware of sudden temperature changes with depth, typical lake hazards, and follow any posted guidance from local authorities.