Little Green Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Little Green Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Little Green Lake today is 22.3°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 |
|---|---|---|---|
| AUG 24 | 21.0°C | 24.0°C | |
| AUG 25 | 20.8°C | 24.0°C | |
| AUG 26 | 20.4°C | 24.0°C | |
| AUG 27 | 20.4°C | 24.0°C | |
| AUG 28 | 20.9°C | 24.0°C | |
| AUG 29 | 22.4°C | 24.0°C | |
| AUG 30 | 22.4°C | 24.0°C | |
| AUG 31 | 22.3°C | 24.0°C | |
| SEP 1 | 19.5°C | 22.2°C | |
| SEP 2 | 19.5°C | 22.0°C | |
| SEP 3 | 19.5°C | 21.9°C | |
| SEP 4 | 19.5°C | 21.7°C | |
| SEP 5 | 19.5°C | 21.6°C | |
| SEP 6 | 19.5°C | 21.5°C | |
| SEP 7 | 19.5°C | 21.3°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 | 2°C | 4°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 8°C |
| April | 3°C | 8°C | 13°C |
| May | 8°C | 13°C | 18°C |
| June | 15°C | 18°C | 21°C |
| July | 20°C | 25°C | 29°C |
| August | 20°C | 24°C | 27°C |
| September | 17°C | 20°C | 22°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 9°C | 15°C |
| December | 0°C | 3°C | 6°C |
Little Green Lake: Water Temperature by Location
Little Green Lake: Weather Forecast
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Location & Local Information
Little Green Lake in Green Lake County, Wisconsin, experiences the full range of seasonal water temperatures typical of interior Wisconsin lakes. In spring (April–May) surface temperatures commonly run from about 40–60°F (4–16°C) as the lake stratifies and warms. Summer (June–August) brings the warmest conditions, with surface readings often in the 68–80°F (20–27°C) range and peak warmth in July. During fall (September–November) the surface cools back through roughly 50–68°F (10–20°C) as the lake mixes, and in winter the surface is usually at or near freezing—about 32°F (0°C) when ice-locked, or 32–40°F (0–4°C) if open water persists.
Swimming at Little Green Lake is a common recreational activity and is generally permitted where there is public access or private frontage, particularly during the warmer months when surface temperatures reach the comfortable 70s°F (around 21–26°C). Conditions that affect whether swimming is advisable include short-term water quality advisories for algal blooms or bacterial contamination, shoreline hazards, sudden depth changes and cold-water shock early or late in the season. Visitors should use designated access points or beaches, observe posted advisories, and be mindful of personal safety and local guidance before entering the water.