Lake of the Isles — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake of the Isles, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake of the Isles 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 | 21.7°C | 21.9°C | |
| SEP 15 | 21.3°C | 21.9°C | |
| SEP 16 | 21.1°C | 21.9°C | |
| SEP 17 | 19.2°C | 21.9°C | |
| SEP 18 | 19.2°C | 21.9°C | |
| SEP 19 | 19.4°C | 21.9°C | |
| SEP 20 | 19.9°C | 21.9°C | |
| SEP 21 | 19.1°C | 21.9°C | |
| SEP 22 | 21.9°C | 19.2°C | |
| SEP 23 | 21.9°C | 19.4°C | |
| SEP 24 | 21.9°C | 19.5°C | |
| SEP 25 | 21.9°C | 19.7°C | |
| SEP 26 | 21.9°C | 19.8°C | |
| SEP 27 | 21.9°C | 19.9°C | |
| SEP 28 | 21.9°C | 20.1°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 | 4°C | 8°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 3°C | 6°C |
| April | 4°C | 9°C | 14°C |
| May | 11°C | 17°C | 24°C |
| June | 17°C | 22°C | 27°C |
| July | 22°C | 25°C | 29°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 22°C | 26°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 4°C | 8°C |
Lake of the Isles: Water Temperature by Location
Lake of the Isles: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake of the Isles is a relatively small, urban lake in Minneapolis whose water temperatures follow the typical seasonal pattern of shallow Midwestern lakes. In winter the surface commonly freezes and water temperatures hover near 32°F (0°C). During spring the lake warms from the mid-30s into the 40s and low 50s Fahrenheit (about 2–12°C) as ice melts and runoff flushes the basin. By midsummer surface temperatures often reach the 60s to mid-70s°F (roughly 16–24°C), though deeper pockets remain cooler; autumn brings a steady decline back into the 40s–60s°F (7–16°C) before refreezing. Local factors such as wind, sunlight, stormwater inflows and occasional algal activity can make temperatures variable on short timescales and produce cooler stratified layers below the surface.
Swimming opportunities at Lake of the Isles are limited. The park does not have an official public swimming beach or staffed lifeguards, and city guidance generally does not promote recreational swimming there. Some residents do wade or swim informally when surface temperatures are warm, but water quality advisories, aquatic vegetation, underwater hazards and the absence of lifeguards are reasons officials and health authorities often caution against it. Anyone considering entering the water should check current local advisories and be aware that conditions can change quickly.