Little Boy Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Little Boy Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Little Boy Lake today is 17.4°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 | 18.9°C | 19.5°C | |
| SEP 15 | 18.5°C | 19.5°C | |
| SEP 16 | 17.7°C | 19.5°C | |
| SEP 17 | 17.5°C | 19.5°C | |
| SEP 18 | 16.8°C | 19.5°C | |
| SEP 19 | 17.1°C | 19.5°C | |
| SEP 20 | 16.5°C | 19.5°C | |
| SEP 22 | 19.5°C | 17.5°C | |
| SEP 23 | 19.5°C | 17.6°C | |
| SEP 24 | 19.5°C | 17.7°C | |
| SEP 25 | 19.5°C | 17.8°C | |
| SEP 26 | 19.5°C | 17.9°C | |
| SEP 27 | 19.5°C | 18.0°C | |
| SEP 28 | 19.5°C | 18.1°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 | 6°C | 12°C |
| February | 0°C | 8°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 1°C | 11°C | 20°C |
| May | 5°C | 14°C | 21°C |
| June | 15°C | 19°C | 22°C |
| July | 17°C | 22°C | 27°C |
| August | 21°C | 25°C | 28°C |
| September | 16°C | 20°C | 23°C |
| October | 5°C | 12°C | 18°C |
| November | 4°C | 8°C | 11°C |
| December | 4°C | 8°C | 11°C |
Little Boy Lake: Water Temperature by Location
Little Boy Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Little Boy Lake, like many small lakes in Minnesota, undergoes pronounced seasonal shifts in water temperature. In early spring (April–May) surface temperatures are usually cool, roughly 35–55°F (2–13°C) as meltwater and cold air keep the lake chilly. By midsummer (June–August) surface waters commonly warm to about 65–75°F (18–24°C), with sheltered shallow bays occasionally reaching around 80°F (27°C) on hot, calm days. As autumn arrives temperatures fall back into the 50s–60s°F (10–16°C) range before the lake cools to near freezing in winter, when surface ice around 32°F (0°C) is typical. Actual values vary with depth, shading, inflows, wind and recent weather, so local readings can differ from these typical ranges.
Swimming is generally permitted in such public lakes when conditions are safe, and many people swim there in summer because surface temperatures are comfortable for recreational use. Restrictions can apply, however, for reasons such as private shorelines, posted advisories about water quality or harmful algal blooms, and unsafe conditions like strong currents or cold water shock in spring and fall. In winter the lake is not suitable for open-water swimming due to ice and hypothermia risk, though ice-related activities follow different safety considerations. Check local postings and exercise common-sense precautions about depth, temperature and water quality before entering.