Whiteface Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Whiteface Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Whiteface Reservoir today is 21.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| AUG 4 | 22.4°C | 24.0°C | |
| AUG 5 | 22.4°C | 24.0°C | |
| AUG 6 | 22.2°C | 24.0°C | |
| AUG 7 | 22.0°C | 24.0°C | |
| AUG 8 | 22.1°C | 24.0°C | |
| AUG 9 | 22.3°C | 24.0°C | |
| AUG 10 | 22.2°C | 24.0°C | |
| AUG 11 | 21.7°C | 24.0°C | |
| AUG 12 | 24.0°C | 21.7°C | |
| AUG 13 | 24.0°C | 21.8°C | |
| AUG 14 | 24.0°C | 22.0°C | |
| AUG 15 | 24.0°C | 22.1°C | |
| AUG 16 | 24.0°C | 22.2°C | |
| AUG 17 | 24.0°C | 22.3°C | |
| AUG 18 | 24.0°C | 22.4°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 | 1°C | 3°C |
| February | 0°C | 1°C | 3°C |
| March | 0°C | 1°C | 3°C |
| April | 1°C | 5°C | 9°C |
| May | 4°C | 11°C | 19°C |
| June | 14°C | 18°C | 21°C |
| July | 18°C | 23°C | 27°C |
| August | 18°C | 24°C | 30°C |
| September | 14°C | 16°C | 19°C |
| October | 9°C | 13°C | 16°C |
| November | 1°C | 7°C | 11°C |
| December | 0°C | 2°C | 4°C |
Whiteface Reservoir: Water Temperature by Location
Whiteface Reservoir: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Whiteface Reservoir in northeastern Minnesota experiences pronounced seasonal changes in water temperature. In winter the lake is typically at or near freezing, about 32–35°F (0–2°C) beneath the ice. Spring brings a gradual warming, with surface temperatures commonly ranging from roughly 35–55°F (2–13°C) as the water mixes and responds to air temperatures. During summer the shallow and surface zones warm the most, often reaching about 60–75°F (15–24°C) on warm spells, while deeper water remains noticeably colder. In autumn the surface cools again to roughly 50–60°F (10–16°C) before freeze-up. Actual readings vary with weather, wind, inflows and depth, and the reservoir can stratify so that deeper water stays much cooler than the surface.
Swimming at Whiteface Reservoir is generally possible and commonly done in the warm months where access and shore conditions are appropriate, because summertime surface temperatures often become comfortable for swimming. However, swimming may be restricted or ill-advised in specific locations for safety reasons: cold deeper water, strong currents near the dam or inlets, boat traffic, poor visibility, or local water-quality advisories can create hazards. Visitors should follow posted signs, use designated public access points, and check local authorities or park managers for any seasonal restrictions or safety guidance before entering the water.