Yellowstone Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Yellowstone Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Yellowstone Lake today is 19.4°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 | 20.1°C | 20.0°C | |
| SEP 15 | 20.9°C | 20.0°C | |
| SEP 16 | 20.0°C | 20.0°C | |
| SEP 17 | 19.8°C | 20.0°C | |
| SEP 18 | 19.7°C | 20.0°C | |
| SEP 19 | 19.7°C | 20.0°C | |
| SEP 20 | 19.6°C | 20.0°C | |
| SEP 22 | 20.0°C | 19.4°C | |
| SEP 23 | 20.0°C | 19.5°C | |
| SEP 24 | 20.0°C | 19.5°C | |
| SEP 25 | 20.0°C | 19.5°C | |
| SEP 26 | 20.0°C | 19.6°C | |
| SEP 27 | 20.0°C | 19.6°C | |
| SEP 28 | 20.0°C | 19.6°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 | 1°C | 4°C | 7°C |
| March | 2°C | 5°C | 8°C |
| April | 5°C | 10°C | 16°C |
| May | 10°C | 15°C | 20°C |
| June | 16°C | 20°C | 24°C |
| July | 19°C | 25°C | 30°C |
| August | 20°C | 24°C | 27°C |
| September | 16°C | 20°C | 24°C |
| October | 13°C | 16°C | 19°C |
| November | 4°C | 8°C | 12°C |
| December | 0°C | 2°C | 5°C |
Yellowstone Lake: Water Temperature by Location
Yellowstone Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Yellowstone Lake in Wisconsin, located in Yellowstone Lake State Park, is a relatively shallow body of water covering 455 acres. The seasonal water temperature reflects the region's climate. In the winter, the lake freezes over, with temperatures near freezing (32∘F or 0∘C). As the seasons progress, the water warms up significantly, particularly in the shallow areas. During the summer months of July and August, the surface temperatures can rise to a comfortable range, often peaking in the mid- to upper-70∘F (around 24∘C to 26∘C) in the warmest parts of the day, making it suitable for recreational water activities.
Swimming is permitted and is a popular activity at this location, distinguishing it from its much larger and colder namesake in Wyoming. Yellowstone Lake State Park in Wisconsin features a designated public swimming beach along the lake's shoreline, complete with an adjacent bathhouse for visitor convenience. While there are no lifeguards on duty, the park welcomes visitors to enjoy swimming and other forms of water recreation, such as boating and fishing, in its temperate waters during the warmer season.