Madison Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Madison Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Madison Lake today is 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 22.0°C | 20.5°C | |
| SEP 15 | 20.6°C | 20.5°C | |
| SEP 16 | 20.4°C | 20.5°C | |
| SEP 17 | 19.7°C | 20.5°C | |
| SEP 18 | 19.1°C | 20.5°C | |
| SEP 19 | 19.4°C | 20.5°C | |
| SEP 20 | 19.6°C | 20.5°C | |
| SEP 21 | 18.4°C | 20.5°C | |
| SEP 22 | 20.5°C | 18.5°C | |
| SEP 23 | 20.5°C | 18.6°C | |
| SEP 24 | 20.5°C | 18.7°C | |
| SEP 25 | 20.5°C | 18.8°C | |
| SEP 26 | 20.5°C | 18.9°C | |
| SEP 27 | 20.5°C | 19.0°C | |
| SEP 28 | 20.5°C | 19.1°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 | 3°C | 7°C |
| February | 0°C | 3°C | 7°C |
| March | 0°C | 4°C | 9°C |
| April | 3°C | 9°C | 16°C |
| May | 11°C | 16°C | 22°C |
| June | 16°C | 22°C | 27°C |
| July | 19°C | 23°C | 28°C |
| August | 21°C | 25°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 6°C | 13°C | 20°C |
| November | 3°C | 7°C | 12°C |
| December | 1°C | 4°C | 8°C |
Madison Lake: Water Temperature by Location
Madison Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Madison Lake in Minnesota follows the typical seasonal pattern for shallow-to-moderate depth Midwestern lakes. In spring, as ice breaks up, surface temperatures generally climb from the low 40s to the low 60s °F (about 5–17 °C). By summer, surface waters commonly reach the upper 60s to upper 70s °F (roughly 20–26 °C), and on hot, calm afternoons can approach the low 80s °F (around 27–28 °C) in sheltered, shallow areas. Autumn brings a steady cooling back into the 50s–60s °F (10–16 °C) before the lake refreezes; under ice in winter the water near the surface typically sits close to freezing, about 32–39 °F (0–4 °C).
Swimming is allowed during the ice-free months and is a common recreational use when surface temperatures are in the comfortable summer range, but whether and where people swim depends on local rules and posted advisories. Safety considerations influence access: water quality advisories, absence of lifeguards, sudden temperature changes below the surface (thermoclines), and cold-shock or hypothermia risk in spring and fall all matter. In winter, ice cover makes swimming unsafe except for organized, well-managed cold-water events. Always follow local signage and public-health guidance before entering the water.