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 18.2°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 |
|---|---|---|---|
| JUN 3 | 14.4°C | 20.7°C | |
| JUN 4 | 14.4°C | 20.7°C | |
| JUN 5 | 15.0°C | 20.7°C | |
| JUN 6 | 14.6°C | 20.7°C | |
| JUN 7 | 15.1°C | 20.7°C | |
| JUN 8 | 17.1°C | 20.7°C | |
| JUN 10 | 17.7°C | 20.7°C | |
| JUN 11 | 20.7°C | 18.3°C | |
| JUN 12 | 20.7°C | 18.5°C | |
| JUN 13 | 20.7°C | 18.6°C | |
| JUN 14 | 20.7°C | 18.7°C | |
| JUN 15 | 20.7°C | 18.8°C | |
| JUN 16 | 20.7°C | 19.0°C | |
| JUN 17 | 20.7°C | 19.1°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
June 9
June 10
June 11
June 12
June 13
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.