North Long Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in North Long Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in North Long Lake today is 15.9°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 | 20.2°C | 20.2°C | |
| SEP 15 | 19.4°C | 20.2°C | |
| SEP 16 | 18.4°C | 20.2°C | |
| SEP 17 | 17.1°C | 20.2°C | |
| SEP 18 | 16.4°C | 20.2°C | |
| SEP 19 | 17.0°C | 20.2°C | |
| SEP 20 | 17.0°C | 20.2°C | |
| SEP 22 | 20.2°C | 16.1°C | |
| SEP 23 | 20.2°C | 16.3°C | |
| SEP 24 | 20.2°C | 16.5°C | |
| SEP 25 | 20.2°C | 16.8°C | |
| SEP 26 | 20.2°C | 17.0°C | |
| SEP 27 | 20.2°C | 17.2°C | |
| SEP 28 | 20.2°C | 17.4°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 | 2°C | 7°C | 12°C |
| February | 2°C | 9°C | 15°C |
| March | 0°C | 9°C | 17°C |
| April | 2°C | 11°C | 20°C |
| May | 7°C | 14°C | 21°C |
| June | 14°C | 18°C | 22°C |
| July | 17°C | 21°C | 25°C |
| August | 21°C | 25°C | 28°C |
| September | 17°C | 20°C | 24°C |
| October | 5°C | 12°C | 18°C |
| November | 4°C | 8°C | 11°C |
| December | 5°C | 8°C | 11°C |
North Long Lake: Water Temperature by Location
North Long Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
North Long Lake in Minnesota follows the typical seasonal cycle of shallow northern lakes, with surface water near freezing under ice in winter and warming through spring into summer. Typical seasonal surface ranges are roughly 32°F (0°C) during prolonged ice cover, rising to about 34–50°F (1–10°C) in early spring as the ice melts, 50–65°F (10–18°C) in late spring, and peaking in summer around 68–78°F (20–26°C) on warm afternoons. In autumn the lake cools back toward the 40s–50s°F (5–15°C) before refreezing; temperatures vary by year, depth, wind and sunshine, so deeper basins stay colder while shallow bays warm faster.
Swimming is commonly possible and practiced during the warmer months at public access points and private shorelines because summer surface temperatures reach comfortable ranges for recreational bathing. Whether swimming is advisable depends on local conditions: water quality advisories for bacteria or harmful algal blooms, visible vegetation or murky water, and boat traffic can restrict or discourage swimming at times. In winter, the lake is typically unsafe for open-water swimming due to ice and near-freezing temperatures, though some people do participate in ice or cold-water dipping with safety precautions. Always follow local signage, health advisories and common-sense safety measures before entering the water.