Cobblestone Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Cobblestone Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Cobblestone Lake today is 21.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUN 3 | 21.1°C | 22.0°C | |
| JUN 4 | 21.1°C | 22.0°C | |
| JUN 5 | 21.1°C | 22.0°C | |
| JUN 6 | 21.1°C | 22.0°C | |
| JUN 7 | 21.9°C | 22.0°C | |
| JUN 8 | 20.8°C | 22.0°C | |
| JUN 11 | 22.0°C | 21.1°C | |
| JUN 12 | 22.0°C | 21.2°C | |
| JUN 13 | 22.0°C | 21.2°C | |
| JUN 14 | 22.0°C | 21.3°C | |
| JUN 15 | 22.0°C | 21.3°C | |
| JUN 16 | 22.0°C | 21.4°C | |
| JUN 17 | 22.0°C | 21.4°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 | 1°C | 4°C |
| February | 0°C | 3°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 | 24°C | 27°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 | 8°C | 12°C |
| December | 1°C | 4°C | 7°C |
Cobblestone Lake: Water Temperature by Location
Cobblestone Lake: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Cobblestone Lake in Minnesota typically follows the seasonal pattern common to lakes in the region. In spring the surface water often climbs from near freezing after ice-out to roughly 40–65°F (4–18°C) as the weather warms. Summer brings the warmest conditions, with surface temperatures commonly in the 65–78°F range (18–26°C), sometimes peaking a bit higher late in heat waves. By fall the lake cools again, with surface readings normally between 45–60°F (7–16°C) as stratification breaks down. In winter the lake is usually ice-covered and surface water temperature sits at or just below freezing, roughly 28–34°F (-2 to 1°C) under the ice, making open-water swimming unrealistic.
Swimming at Cobblestone Lake is generally permitted during the warmer months when local regulations, access rules and water-quality testing allow. Recreational swimming is most common in summer because surface temperatures reach comfortable levels and local public access points or private shorelines facilitate entry. Authorities or property owners may close areas for safety reasons — for example during algal blooms, contamination advisories, or when ice is present — and cold water in spring or fall still poses hypothermia risk even if technically accessible. As always, swimmers should check current local advisories and observe posted rules before entering the water.