Trout Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Trout Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Trout Lake today is 16.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 19.2°C | 17.4°C | |
| SEP 15 | 18.1°C | 17.4°C | |
| SEP 16 | 18.1°C | 17.4°C | |
| SEP 17 | 18.4°C | 17.4°C | |
| SEP 18 | 17.7°C | 17.4°C | |
| SEP 19 | 17.9°C | 17.4°C | |
| SEP 20 | 18.3°C | 17.4°C | |
| SEP 21 | 16.7°C | 17.4°C | |
| SEP 22 | 17.4°C | 16.7°C | |
| SEP 23 | 17.4°C | 16.8°C | |
| SEP 24 | 17.4°C | 16.8°C | |
| SEP 25 | 17.4°C | 16.8°C | |
| SEP 26 | 17.4°C | 16.9°C | |
| SEP 27 | 17.4°C | 16.9°C | |
| SEP 28 | 17.4°C | 16.9°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 | 3°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 2°C | 5°C |
| April | 0°C | 4°C | 8°C |
| May | 6°C | 12°C | 17°C |
| June | 15°C | 18°C | 21°C |
| July | 13°C | 20°C | 27°C |
| August | 18°C | 24°C | 30°C |
| September | 14°C | 17°C | 21°C |
| October | 9°C | 13°C | 17°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 2°C | 5°C |
Trout Lake: Water Temperature by Location
Trout Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Trout Lake in northern Wisconsin experiences marked seasonal variation in surface water temperature. In winter the lake is at or just above freezing, roughly 32–39°F (0–4°C) under ice. Spring warming brings surface temperatures into the 40s–60s°F (4–16°C) by late spring, while summer typically produces the warmest surface readings, often in the mid‑60s to low‑70s°F (about 18–24°C) on calm, sunny days. By fall the surface cools back toward the 40s–60s°F range (about 4–16°C). Deeper water remains substantially colder year‑round, commonly near 39°F (4°C) below the thermocline, so diving or prolonged immersion can feel much chillier than surface measurements imply.
Swimming in Trout Lake is generally permitted and commonly enjoyed from public access points, private shorelines, and resort beaches, but practical swimming opportunities are largely seasonal. Most people find comfortable open‑water swimming only during the warmest weeks of summer when surface temperatures are in the high teens to mid‑20s Celsius. Outside mid‑summer, cold water can pose hypothermia risks and ice cover in winter makes swimming unsafe; brief dips in spring and fall are possible but require caution. Local advisories or posted rules may restrict access occasionally for safety or water‑quality reasons, so check conditions before entering the water.