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 13.6°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 | 15.0°C | 12.5°C | |
| OCT 6 | 14.8°C | 12.5°C | |
| OCT 7 | 14.0°C | 12.5°C | |
| OCT 8 | 14.6°C | 12.5°C | |
| OCT 9 | 14.5°C | 12.5°C | |
| OCT 10 | 13.9°C | 12.5°C | |
| OCT 11 | 13.7°C | 12.5°C | |
| OCT 12 | 13.6°C | 12.5°C | |
| OCT 13 | 12.5°C | 13.5°C | |
| OCT 14 | 12.5°C | 13.5°C | |
| OCT 15 | 12.5°C | 13.4°C | |
| OCT 16 | 12.5°C | 13.4°C | |
| OCT 17 | 12.5°C | 13.3°C | |
| OCT 18 | 12.5°C | 13.3°C | |
| OCT 19 | 12.5°C | 13.2°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 | 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 | 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 | 8°C | 12°C |
| December | 1°C | 4°C | 7°C |
Cobblestone Lake: Water Temperature by Location
Cobblestone Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
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.