Lake Koronis — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Koronis, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Koronis today is 17.8°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 | 20.3°C | 20.8°C | |
| SEP 15 | 19.5°C | 20.8°C | |
| SEP 16 | 19.4°C | 20.8°C | |
| SEP 17 | 18.3°C | 20.8°C | |
| SEP 18 | 17.8°C | 20.8°C | |
| SEP 19 | 17.6°C | 20.8°C | |
| SEP 20 | 17.5°C | 20.8°C | |
| SEP 21 | 17.8°C | 20.8°C | |
| SEP 22 | 20.8°C | 18.0°C | |
| SEP 23 | 20.8°C | 18.1°C | |
| SEP 24 | 20.8°C | 18.3°C | |
| SEP 25 | 20.8°C | 18.4°C | |
| SEP 26 | 20.8°C | 18.6°C | |
| SEP 27 | 20.8°C | 18.7°C | |
| SEP 28 | 20.8°C | 18.9°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 | 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 | 15°C | 24°C |
| June | 15°C | 19°C | 24°C |
| July | 17°C | 23°C | 29°C |
| August | 21°C | 25°C | 28°C |
| September | 18°C | 21°C | 24°C |
| October | 5°C | 12°C | 19°C |
| November | 4°C | 8°C | 11°C |
| December | 3°C | 7°C | 11°C |
Lake Koronis: Water Temperature by Location
Lake Koronis: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Koronis, like other Central Minnesota lakes, shows pronounced seasonal swings in surface temperature. During late spring (April–May) surface water typically warms from about 40–60°F (4–16°C). By early summer (June) temperatures commonly reach 65–75°F (18–24°C), with peak summer (July–August) surface readings often in the 75–85°F range (24–29°C) on warm days. In autumn the surface cools back toward roughly 50–70°F (10–21°C) before the lake freezes; winter surface conditions hover around the freezing point, about 32°F (0°C), under ice cover and well below comfortable swimming temperatures.
Swimming in Lake Koronis is generally permitted in the open-water season at public access points and beaches, and many visitors swim there when summertime temperatures are in the 70s–80s °F (20s °C). Local parks and launch areas provide access, but actual swimming may be restricted temporarily for safety or health reasons: water-quality advisories for harmful algal blooms or elevated bacteria can close beaches, and ice cover in winter makes swimming unsafe. In short, summer conditions often support recreational swimming, while regulatory advisories and seasonal ice determine when it is allowed or advised against.