Duck Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Duck Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Duck Lake today is 18.1°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 23 | 16.9°C | 13.3°C | |
| JUN 24 | 18.6°C | 13.3°C | |
| JUN 25 | 18.7°C | 13.3°C | |
| JUN 26 | 18.7°C | 13.3°C | |
| JUN 27 | 18.3°C | 13.3°C | |
| JUN 28 | 18.3°C | 13.3°C | |
| JUN 29 | 18.3°C | 13.3°C | |
| JUN 30 | 18.1°C | 13.3°C | |
| JUL 1 | 16.7°C | 18.0°C | |
| JUL 2 | 16.7°C | 18.0°C | |
| JUL 3 | 16.7°C | 17.9°C | |
| JUL 4 | 16.7°C | 17.8°C | |
| JUL 5 | 16.7°C | 17.8°C | |
| JUL 6 | 16.7°C | 17.7°C | |
| JUL 7 | 16.7°C | 17.6°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 | 2°C | 5°C | 8°C |
| February | 2°C | 5°C | 7°C |
| March | 2°C | 5°C | 8°C |
| April | 1°C | 6°C | 11°C |
| May | 0°C | 9°C | 18°C |
| June | 8°C | 13°C | 19°C |
| July | 14°C | 17°C | 19°C |
| August | 16°C | 18°C | 21°C |
| September | 13°C | 16°C | 19°C |
| October | 6°C | 11°C | 16°C |
| November | 4°C | 7°C | 10°C |
| December | 4°C | 6°C | 9°C |
Duck Lake: Water Temperature by Location
Duck Lake: Weather Forecast
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Location & Local Information
Duck Lake in Montana typically follows the temperature patterns common to small to mid‑sized lakes in the region. Surface temperatures in summer often reach about 60–75°F (15–24°C) in warm, shallow areas, though deeper basins remain cooler. In spring and early summer, after snowmelt, surface water commonly sits in the 40–55°F (4–13°C) range; autumn cooling brings temperatures down to roughly 45–60°F (7–16°C) before freezing. Winter conditions frequently push the lake toward freezing, with near‑surface temperatures around 32–39°F (0–4°C) and, in colder years, ice cover that keeps water near 32°F (0°C).
Swimming at Duck Lake is generally allowed during open‑water months, but conditions and safety considerations govern how practical it is. Because even summer surface temperatures can feel chilly compared with coastal waters, swimmers may be comfortable only in brief swims or with wetsuits; cold water increases the risk of rapid heat loss and hypothermia. Local rules, beach access, water quality advisories, and seasonal hazards such as sudden storms or submerged vegetation can also affect whether swimming is advisable, so visitors should check on‑site signage or local guidance and use flotation devices or supervision where appropriate.