Yellow Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Yellow Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Yellow Lake today is 18.7°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 | 20.7°C | 20.6°C | |
| SEP 15 | 19.1°C | 20.6°C | |
| SEP 16 | 19.2°C | 20.6°C | |
| SEP 17 | 19.4°C | 20.6°C | |
| SEP 18 | 18.1°C | 20.6°C | |
| SEP 19 | 19.1°C | 20.6°C | |
| SEP 20 | 18.9°C | 20.6°C | |
| SEP 22 | 20.6°C | 18.8°C | |
| SEP 23 | 20.6°C | 18.9°C | |
| SEP 24 | 20.6°C | 19.0°C | |
| SEP 25 | 20.6°C | 19.1°C | |
| SEP 26 | 20.6°C | 19.2°C | |
| SEP 27 | 20.6°C | 19.3°C | |
| SEP 28 | 20.6°C | 19.4°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 | 6°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 7°C | 13°C |
| May | 9°C | 14°C | 20°C |
| June | 16°C | 22°C | 27°C |
| July | 18°C | 23°C | 27°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 6°C | 13°C | 19°C |
| November | 2°C | 8°C | 12°C |
| December | 1°C | 3°C | 6°C |
Yellow Lake: Water Temperature by Location
Yellow Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Yellow Lake in Wisconsin follows the typical seasonal cycle of small inland lakes in the region. Surface water temperatures during winter sit at or just above freezing, about 32°F (0°C), and the lake is commonly ice-covered for months. In spring, thawing raises temperatures into the mid-30s to mid-50s °F (about 2–13°C) as the water mixes and warms. Summer brings the warmest conditions, with surface readings often ranging from roughly 68–78°F (20–26°C) and occasionally reaching the low 80s °F (27–29°C) during heat spells. By autumn the lake cools again to approximately 50–65°F (10–18°C) before refreezing in winter. Deeper layers remain colder year-round and stratification can create cooler pockets even in summer.
Swimming at Yellow Lake is generally possible during the warmer months when surface temperatures are comfortable for recreation. Public access points and local beaches typically permit swimming, but availability depends on land ownership, management by county or town parks, and posted rules. Seasonal cold and ice make swimming unsafe outside summer, and short-term advisories — for example, from algal blooms or water-quality concerns — can temporarily restrict swimming. Visitors should check local signage and advisories, observe safety measures for temperature and depth, and be mindful that sudden chills in cooler water can pose risks even on warm days.