Lake Vermilion — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Vermilion, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Vermilion today is 22.8°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 | 23.3°C | 23.5°C | |
| AUG 5 | 23.0°C | 23.5°C | |
| AUG 6 | 22.6°C | 23.5°C | |
| AUG 7 | 22.4°C | 23.5°C | |
| AUG 8 | 22.8°C | 23.5°C | |
| AUG 9 | 22.8°C | 23.5°C | |
| AUG 10 | 23.0°C | 23.5°C | |
| AUG 11 | 22.7°C | 23.5°C | |
| AUG 12 | 23.5°C | 22.8°C | |
| AUG 13 | 23.5°C | 22.9°C | |
| AUG 14 | 23.5°C | 22.9°C | |
| AUG 15 | 23.5°C | 22.9°C | |
| AUG 16 | 23.5°C | 23.0°C | |
| AUG 17 | 23.5°C | 23.0°C | |
| AUG 18 | 23.5°C | 23.0°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 | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 6°C | 10°C |
| May | 3°C | 11°C | 19°C |
| June | 14°C | 21°C | 27°C |
| July | 18°C | 23°C | 27°C |
| August | 19°C | 24°C | 28°C |
| September | 16°C | 20°C | 23°C |
| October | 6°C | 12°C | 17°C |
| November | 2°C | 7°C | 11°C |
| December | 0°C | 4°C | 6°C |
Lake Vermilion: Water Temperature by Location
Lake Vermilion: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Lake Vermilion’s water temperatures follow a clear seasonal pattern typical of large northern Minnesota lakes. After ice-out in spring, surface temperatures are generally cool, roughly 40–60°F (4–16°C) through May and June as the lake mixes and warms. In midsummer, surface readings commonly reach about 65–75°F (18–24°C) on warm afternoons in July and August, though sheltered bays and shallow areas can be a few degrees warmer. By early fall the surface cools to roughly 55–65°F (13–18°C), and by late autumn and winter the lake approaches freezing; with ice cover from roughly December through March, surface waters are near 32–34°F (0–1°C) while deeper layers remain nearer 39°F (4°C), the temperature of maximum density. Wind, depth and sunlight cause local variation, and thermal stratification can produce much colder water below the warm surface layer.
Swimming is allowed during the ice-free season and is a common recreational activity at public beaches, resort shorelines and bays when surface temperatures are in the comfortable summer range. Caution is advised, however: even on warm days sudden temperature drops with depth, wind-driven currents or cold pockets near inlets can increase the risk of cold-water shock and hypothermia. In winter, the frozen surface prevents conventional swimming; some people engage in ice plunges, but those carry significant hazards and require appropriate safety measures and local awareness of ice thickness and conditions.