Lost Grove Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lost Grove Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lost Grove Lake today is 21.3°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 |
|---|---|---|---|
| SEP 13 | 22.0°C | 22.3°C | |
| SEP 14 | 22.2°C | 22.3°C | |
| SEP 15 | 21.9°C | 22.3°C | |
| SEP 16 | 21.4°C | 22.3°C | |
| SEP 17 | 21.8°C | 22.3°C | |
| SEP 18 | 21.1°C | 22.3°C | |
| SEP 19 | 21.6°C | 22.3°C | |
| SEP 20 | 20.5°C | 22.3°C | |
| SEP 21 | 22.3°C | 21.4°C | |
| SEP 22 | 22.3°C | 21.4°C | |
| SEP 23 | 22.3°C | 21.5°C | |
| SEP 24 | 22.3°C | 21.5°C | |
| SEP 25 | 22.3°C | 21.6°C | |
| SEP 26 | 22.3°C | 21.6°C | |
| SEP 27 | 22.3°C | 21.7°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 | 6°C |
| March | 1°C | 6°C | 9°C |
| April | 6°C | 12°C | 18°C |
| May | 13°C | 18°C | 24°C |
| June | 19°C | 22°C | 26°C |
| July | 22°C | 26°C | 31°C |
| August | 21°C | 25°C | 29°C |
| September | 19°C | 22°C | 26°C |
| October | 14°C | 18°C | 22°C |
| November | 5°C | 10°C | 15°C |
| December | 0°C | 3°C | 6°C |
Lost Grove Lake: Water Temperature by Location
Lost Grove Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lost Grove Lake in Iowa experiences the seasonal temperature swings common to Midwestern reservoirs. In spring the surface water typically ranges from about 40–60°F (4–16°C) as snowmelt and runoff cool the basin. Summer brings the warmest conditions, with surface temperatures often climbing to roughly 65–80°F (18–27°C) on sunny days, while stratification can leave deeper water several degrees colder. During autumn the lake cools back to roughly 50–65°F (10–18°C) and by winter the surface approaches freezing, commonly around 32–39°F (0–4°C) when ice conditions are forming. Weather, wind, and recent rainfall can cause short-term variations, so actual readings at the shore may differ from these general ranges.
Swimming at Lost Grove Lake is generally possible where public shoreline access exists, but there are typically no staffed lifeguards or formal, monitored swim beaches, so people swim at their own risk. Local rules and posted signs should be followed because hazards such as sudden drop-offs, underwater vegetation, boat traffic, and cold-water shock in shoulder seasons can increase danger. In colder months swimming is discouraged due to low water temperatures and the risk of hypothermia. Visitors should check current conditions and adhere to any on-site restrictions before entering the water.