Lake Pepin — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Pepin, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Pepin today is 20°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 |
|---|---|---|---|
| SEP 14 | 20.9°C | 18.8°C | |
| SEP 15 | 20.9°C | 18.8°C | |
| SEP 16 | 21.0°C | 18.8°C | |
| SEP 17 | 20.4°C | 18.8°C | |
| SEP 18 | 20.0°C | 18.8°C | |
| SEP 19 | 20.3°C | 18.8°C | |
| SEP 20 | 20.6°C | 18.8°C | |
| SEP 21 | 20.0°C | 18.8°C | |
| SEP 22 | 18.8°C | 19.9°C | |
| SEP 23 | 18.8°C | 19.9°C | |
| SEP 24 | 18.8°C | 19.8°C | |
| SEP 25 | 18.8°C | 19.8°C | |
| SEP 26 | 18.8°C | 19.7°C | |
| SEP 27 | 18.8°C | 19.6°C | |
| SEP 28 | 18.8°C | 19.6°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 | 3°C | 6°C |
| April | 1°C | 8°C | 16°C |
| May | 10°C | 16°C | 23°C |
| June | 16°C | 20°C | 24°C |
| July | 22°C | 26°C | 29°C |
| August | 20°C | 25°C | 30°C |
| September | 14°C | 19°C | 24°C |
| October | 9°C | 14°C | 19°C |
| November | 4°C | 8°C | 11°C |
| December | 0°C | 2°C | 5°C |
Lake Pepin: Water Temperature by Location
Lake Pepin: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Lake Pepin’s water temperatures vary markedly through the year because it is a broad, riverine widening of the Mississippi and responds quickly to air temperature and wind mixing. In winter (December–February) surface temperatures typically sit around freezing, roughly 32–38°F (0–3°C) under ice or near-ice conditions. Spring (March–May) brings a steady rise, with surface waters often between about 36–55°F (2–13°C) as thaw and runoff continue. Summer (June–August) is the warmest period; surface temperatures commonly reach 65–80°F (18–27°C) on warm, calm days, though cooler in deeper or wind-exposed areas. By autumn (September–November) the lake cools again, generally ranging from about 50–65°F (10–18°C) before ice formation begins.
Swimming in Lake Pepin is permitted and popular at public beaches and park sites during the warmer months because summer surface temperatures are comfortable for recreation. However, conditions vary by location and day: strong currents and boat traffic from the Mississippi can make some spots less suitable, and wind-driven waves can reduce clarity and comfort. Local health or park authorities may post advisories or close beaches when bacterial contamination or harmful algal blooms are present, and cold-water or ice conditions in shoulder seasons pose hypothermia risks, so swimmers should heed posted warnings and choose supervised, designated swim areas.