Crystal Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Crystal Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Crystal Lake today is 19.1°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 | 21.9°C | 21.2°C | |
| SEP 15 | 21.0°C | 21.2°C | |
| SEP 16 | 20.8°C | 21.2°C | |
| SEP 17 | 19.1°C | 21.2°C | |
| SEP 18 | 19.2°C | 21.2°C | |
| SEP 19 | 19.3°C | 21.2°C | |
| SEP 20 | 19.7°C | 21.2°C | |
| SEP 21 | 19.1°C | 21.2°C | |
| SEP 22 | 21.2°C | 19.2°C | |
| SEP 23 | 21.2°C | 19.3°C | |
| SEP 24 | 21.2°C | 19.4°C | |
| SEP 25 | 21.2°C | 19.5°C | |
| SEP 26 | 21.2°C | 19.6°C | |
| SEP 27 | 21.2°C | 19.7°C | |
| SEP 28 | 21.2°C | 19.8°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 | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 5°C | 10°C | 15°C |
| May | 11°C | 17°C | 23°C |
| June | 17°C | 22°C | 27°C |
| July | 22°C | 25°C | 29°C |
| August | 20°C | 24°C | 29°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 |
Crystal Lake: Water Temperature by Location
Crystal Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Crystal Lake in Minnesota follows the seasonal temperature patterns typical of shallow to mid-depth inland lakes in the region. During winter months the lake is usually ice-covered and water temperatures near the surface are close to freezing, about 32°F (0°C) to the mid-30s°F (1–3°C) beneath the ice. In spring, as ice breaks up and the lake mixes, temperatures commonly rise into the 40s and 50s°F (4–15°C). By summer the surface can warm substantially, often ranging from the high 60s to upper 70s°F (20–26°C) in average years, with sheltered shallows occasionally reaching around 80°F (27°C). In autumn the lake cools back through the 50s°F (10–15°C) as turnover occurs and the season progresses.
Swimming is generally permitted during the open-water season when the lake is free of ice, and many people use public access points and beaches for recreation. Whether it is advisable to swim depends on current water temperatures, weather, and local water-quality or safety advisories; colder spring and fall temperatures can make prolonged immersion uncomfortable or hazardous due to reduced body heat. Winter swimming through ice is possible only under specialized, controlled conditions and with appropriate safety measures, but it is not recommended for casual recreation.