Spider Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Spider Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Spider Lake today is 17.8°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 | 18.0°C | |
| SEP 15 | 18.1°C | 18.0°C | |
| SEP 16 | 18.1°C | 18.0°C | |
| SEP 17 | 18.3°C | 18.0°C | |
| SEP 18 | 17.4°C | 18.0°C | |
| SEP 19 | 17.8°C | 18.0°C | |
| SEP 20 | 17.7°C | 18.0°C | |
| SEP 21 | 17.8°C | 18.0°C | |
| SEP 22 | 18.0°C | 17.8°C | |
| SEP 23 | 18.0°C | 17.8°C | |
| SEP 24 | 18.0°C | 17.8°C | |
| SEP 25 | 18.0°C | 17.8°C | |
| SEP 26 | 18.0°C | 17.9°C | |
| SEP 27 | 18.0°C | 17.9°C | |
| SEP 28 | 18.0°C | 17.9°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 | 1°C | 6°C | 11°C |
| May | 7°C | 13°C | 18°C |
| June | 12°C | 17°C | 21°C |
| July | 20°C | 24°C | 27°C |
| August | 18°C | 24°C | 30°C |
| September | 14°C | 18°C | 22°C |
| October | 9°C | 13°C | 17°C |
| November | 2°C | 8°C | 13°C |
| December | 0°C | 3°C | 6°C |
Spider Lake: Water Temperature by Location
Spider Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Spider Lake in northern Wisconsin typically follows the seasonal temperature patterns of small glacial lakes in the region. After ice-off in spring, surface temperatures are cold, often in the 40–60°F range (4–15°C) as the water mixes and warms. By summer, surface temperatures commonly reach about 70–80°F (21–27°C) on warm days, with the warmest readings in shallow bays and nearshore areas; deeper layers remain cooler. In autumn the surface cools to roughly 50–65°F (10–18°C) as air temperatures drop, and in winter the lake is usually ice-covered with surface temperatures at or near freezing (32°F / 0°C) while the water below the ice stays near 39°F (4°C).
Swimming is generally possible and popular in the warm months when surface temperatures are comfortable, especially late June through August, but it is not recommended during spring cold spells or once ice returns in late fall/winter. Access and specific rules vary by shoreland ownership, public access points, and local authorities, and water quality advisories (for issues such as algal blooms) or safety signage can restrict swimming. As with any lake, swimmers should be mindful of sudden temperature changes, underwater hazards, and the absence of lifeguards.