Twin Valley Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Twin Valley Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Twin Valley Lake today is 19.6°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 13 | 21.3°C | 20.0°C | |
| SEP 14 | 20.4°C | 20.0°C | |
| SEP 15 | 21.0°C | 20.0°C | |
| SEP 16 | 20.3°C | 20.0°C | |
| SEP 17 | 20.2°C | 20.0°C | |
| SEP 18 | 20.1°C | 20.0°C | |
| SEP 19 | 19.9°C | 20.0°C | |
| SEP 20 | 20.0°C | 20.0°C | |
| SEP 21 | 20.0°C | 19.6°C | |
| SEP 22 | 20.0°C | 19.6°C | |
| SEP 23 | 20.0°C | 19.7°C | |
| SEP 24 | 20.0°C | 19.7°C | |
| SEP 25 | 20.0°C | 19.7°C | |
| SEP 26 | 20.0°C | 19.7°C | |
| SEP 27 | 20.0°C | 19.7°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 | 3°C | 5°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 5°C | 8°C |
| April | 5°C | 10°C | 16°C |
| May | 10°C | 15°C | 19°C |
| June | 16°C | 20°C | 24°C |
| July | 17°C | 24°C | 30°C |
| August | 19°C | 23°C | 27°C |
| September | 16°C | 20°C | 24°C |
| October | 13°C | 16°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 0°C | 2°C | 5°C |
Twin Valley Lake: Water Temperature by Location
Twin Valley Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Twin Valley Lake in Wisconsin follows the typical seasonal pattern for small inland lakes in the region. After ice-out in spring, surface temperatures usually climb from roughly 40–60°F (4–16°C) through April to June. By mid to late summer the lake commonly reaches its warmest range of about 70–78°F (21–26°C), which is when the water feels most comfortable for prolonged swimming. In early fall temperatures fall back to roughly 50–64°F (10–18°C) as the air cools. During winter the surface often freezes; water beneath the ice tends to stay near the temperature of maximum density, roughly 33–39°F (1–4°C), and the surface itself can be at or below 32°F (0°C).
Swimming in Twin Valley Lake is generally allowed during the ice-free months because summer temperatures reach levels suitable for recreational bathing and because public access points provide places to enter the water. Ice cover in winter makes swimming unsafe except for specialized, supervised cold-water activities, and local rules or health advisories may sometimes close swimming areas for water-quality or safety reasons. Visitors should observe signage and current conditions before entering the water.