Marion Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Marion Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Marion Lake today is 26.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| JUL 14 | 24.2°C | 24.7°C | |
| JUL 15 | 26.5°C | 24.7°C | |
| JUL 16 | 27.0°C | 24.7°C | |
| JUL 17 | 27.1°C | 24.7°C | |
| JUL 18 | 26.9°C | 24.7°C | |
| JUL 19 | 26.9°C | 24.7°C | |
| JUL 20 | 26.6°C | 24.7°C | |
| JUL 21 | 26.6°C | 24.7°C | |
| JUL 22 | 24.7°C | 26.7°C | |
| JUL 23 | 24.7°C | 26.6°C | |
| JUL 24 | 24.7°C | 26.5°C | |
| JUL 25 | 24.7°C | 26.4°C | |
| JUL 26 | 24.7°C | 26.3°C | |
| JUL 27 | 24.7°C | 26.2°C | |
| JUL 28 | 24.7°C | 26.1°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 7°C |
| April | 5°C | 9°C | 14°C |
| May | 11°C | 17°C | 22°C |
| June | 17°C | 22°C | 27°C |
| July | 22°C | 25°C | 28°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 4°C | 7°C |
Marion Lake: Water Temperature by Location
Marion Lake: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
Marion Lake in Minnesota follows the typical seasonal pattern of inland lakes in the region, with surface temperatures rising and falling with air temperatures and sunlight. After ice-out in spring, surface water often ranges from roughly 34–55°F (1–13°C) as the lake mixes and warms. In summer, shallow areas and the surface commonly warm to about 65–78°F (18–26°C), with peak afternoons sometimes reaching the low 80s (around 27–28°C) on very warm, calm days. By early fall the surface cools back toward 40–60°F (4–16°C) as nights lengthen. In winter the lake is usually ice-covered and the water beneath the ice stays near freezing, generally about 32–39°F (0–4°C). Deeper water is colder year-round and nearshore temperatures respond most quickly to air temperature swings, so conditions can vary by location and depth.
Swimming is commonly allowed at Minnesota lakes including Marion Lake where public access and beaches exist, but it is governed by local rules and current conditions. Warm summer surface temperatures often make swimming comfortable for recreation, while spring and fall cold water can increase the risk of cold shock and reduce swim time. Authorities may close or advise against swimming because of bacterial contamination, harmful algal blooms, hazards, or unsafe ice in winter. It’s advisable to check posted signs and local water-quality advisories before entering the water.