Swan Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Swan Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Swan Lake today is 12.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 | 14.0°C | 14.5°C | |
| JUN 4 | 14.0°C | 14.5°C | |
| JUN 5 | 13.9°C | 14.5°C | |
| JUN 6 | 13.9°C | 14.5°C | |
| JUN 7 | 14.2°C | 14.5°C | |
| JUN 8 | 14.1°C | 14.5°C | |
| JUN 11 | 14.5°C | 12.8°C | |
| JUN 12 | 14.5°C | 12.9°C | |
| JUN 13 | 14.5°C | 13.0°C | |
| JUN 14 | 14.5°C | 13.1°C | |
| JUN 15 | 14.5°C | 13.2°C | |
| JUN 16 | 14.5°C | 13.2°C | |
| JUN 17 | 14.5°C | 13.3°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 | 3°C | 5°C |
| March | 1°C | 3°C | 6°C |
| April | 1°C | 4°C | 8°C |
| May | 3°C | 10°C | 17°C |
| June | 11°C | 15°C | 18°C |
| July | 16°C | 19°C | 21°C |
| August | 17°C | 21°C | 25°C |
| September | 15°C | 18°C | 20°C |
| October | 7°C | 12°C | 16°C |
| November | 4°C | 6°C | 9°C |
| December | 0°C | 2°C | 5°C |
Swan Lake: Water Temperature by Location
Swan Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Swan Lake in Montana typically stays cool through much of the year because it is a relatively shallow, mountain‑valley lake fed by snowmelt and streams. Surface temperatures in summer commonly range from about 60 to 70°F (15 to 21°C) on warm afternoons, while spring and fall see much cooler conditions, roughly 35 to 60°F (2 to 15°C) depending on recent weather. In winter the lake commonly approaches freezing, with surface temperatures near 32 to 38°F (0 to 3°C) and periods of ice cover in cold spells. Deeper water remains colder year‑round than the surface, and sudden cold pockets can occur where springs or inflowing streams enter.
Swimming in Swan Lake is generally allowed and is a common summertime activity at public access points and private shorelines because there are no broad prohibitions on recreational use. That said, the lake’s relatively cool temperatures even in summer mean swimmers should be cautious about cold‑water shock and hypothermia, especially when venturing far from shore or into deeper areas. Water quality can vary seasonally, so it’s sensible to observe posted advisories and local guidance about algal blooms, bacterial counts, or boating hazards before swimming.