Lake Charlotte — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Charlotte, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Charlotte today is 19.6°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 | 21.5°C | 21.3°C | |
| SEP 15 | 20.4°C | 21.3°C | |
| SEP 16 | 20.2°C | 21.3°C | |
| SEP 17 | 19.3°C | 21.3°C | |
| SEP 18 | 18.6°C | 21.3°C | |
| SEP 19 | 19.1°C | 21.3°C | |
| SEP 20 | 19.3°C | 21.3°C | |
| SEP 21 | 19.6°C | 21.3°C | |
| SEP 22 | 21.3°C | 19.7°C | |
| SEP 23 | 21.3°C | 19.8°C | |
| SEP 24 | 21.3°C | 19.9°C | |
| SEP 25 | 21.3°C | 19.9°C | |
| SEP 26 | 21.3°C | 20.0°C | |
| SEP 27 | 21.3°C | 20.1°C | |
| SEP 28 | 21.3°C | 20.2°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 | 2°C | 5°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 4°C |
| April | 2°C | 7°C | 12°C |
| May | 9°C | 15°C | 22°C |
| June | 16°C | 22°C | 27°C |
| July | 19°C | 24°C | 29°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 21°C | 25°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 3°C | 6°C |
Lake Charlotte: Water Temperature by Location
Lake Charlotte: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Lake Charlotte’s surface water temperatures follow the seasonal patterns typical of small to medium lakes in east-central Minnesota. In summer, surface readings commonly reach the low to mid 70s°F (about 21–25°C) and on warm spells can get into the upper 70s to low 80s°F (25–28°C). Late spring and early summer are cooler, often in the 50s–60s°F (10–16°C) as the lake stratifies, while autumn brings a steady decline back into the 40s–50s°F (4–10°C) as cooling and turnover occur. In winter the lake will approach freezing at the surface (around 32°F / 0°C) and is frequently ice-covered for several months, with underlying water only a few degrees above freezing.
Swimming is generally permitted at Lake Charlotte where there is public shoreline access or designated swimming areas, and many people swim there in mid- to late summer when surface temperatures are most comfortable. Local rules, posted signs and water-quality advisories should be checked before entering the water; algae blooms or bacterial advisories can temporarily close swimming. Early-season and late-season swimming carry a risk of cold-water shock and hypothermia because temperatures can be well below comfortable levels, and winter ice makes swimming unsafe except for controlled ice-swim events with proper precautions.