Lake Ann — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Ann, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Ann today is 14.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 |
|---|---|---|---|
| OCT 5 | 15.9°C | 12.5°C | |
| OCT 6 | 15.6°C | 12.5°C | |
| OCT 7 | 14.4°C | 12.5°C | |
| OCT 8 | 15.1°C | 12.5°C | |
| OCT 9 | 15.3°C | 12.5°C | |
| OCT 10 | 14.7°C | 12.5°C | |
| OCT 11 | 14.7°C | 12.5°C | |
| OCT 12 | 14.4°C | 12.5°C | |
| OCT 13 | 12.5°C | 14.5°C | |
| OCT 14 | 12.5°C | 14.4°C | |
| OCT 15 | 12.5°C | 14.3°C | |
| OCT 16 | 12.5°C | 14.2°C | |
| OCT 17 | 12.5°C | 14.1°C | |
| OCT 18 | 12.5°C | 14.0°C | |
| OCT 19 | 12.5°C | 13.9°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 | 0°C | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 3°C | 6°C |
| April | 3°C | 8°C | 14°C |
| May | 10°C | 16°C | 23°C |
| June | 17°C | 22°C | 27°C |
| July | 21°C | 25°C | 30°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 4°C | 7°C |
Lake Ann: Water Temperature by Location
Lake Ann: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Lake Ann’s water temperatures follow the typical pattern for small lakes in Minnesota. In winter the surface sits around freezing, near 32°F (0°C) beneath ice cover. During spring melt and shoulder months temperatures rise from roughly 35–60°F (2–15°C) as the water stratifies. Peak summer surface temperatures commonly reach about 65–78°F (18–26°C), with shallow bays sometimes warming into the upper 70s°F (around 25–27°C) on hot, calm days. In fall the lake cools back toward 50–65°F (10–18°C) before refreezing. These ranges are for surface waters; deeper layers remain cooler through summer.
Swimming is generally permitted at Lake Ann in areas with public access or private shoreline because the lake is used for recreation, but conditions and local rules determine safe use. There are usually no lifeguards at small lakes, and water quality can vary seasonally; things like blue‑green algae blooms, high bacterial counts after heavy rains, or aquatic vegetation can lead to advisories or temporary closures. For comfortable recreational swimming, summer months when surface temperatures are in the mid‑60s to upper‑70s°F (18–26°C) are best, while spring and fall waters are often too cold for prolonged swimming without a wetsuit. Users should consult local authorities or posted signs for current advisories and access details.