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 19°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 |
|---|---|---|---|
| JUL 14 | 16.0°C | 18.2°C | |
| JUL 15 | 18.0°C | 18.2°C | |
| JUL 16 | 17.0°C | 18.2°C | |
| JUL 17 | 17.0°C | 18.2°C | |
| JUL 18 | 18.4°C | 18.2°C | |
| JUL 19 | 20.4°C | 18.2°C | |
| JUL 20 | 20.4°C | 18.2°C | |
| JUL 21 | 19.1°C | 18.2°C | |
| JUL 22 | 18.2°C | 19.0°C | |
| JUL 23 | 18.2°C | 18.9°C | |
| JUL 24 | 18.2°C | 18.9°C | |
| JUL 25 | 18.2°C | 18.8°C | |
| JUL 26 | 18.2°C | 18.8°C | |
| JUL 27 | 18.2°C | 18.8°C | |
| JUL 28 | 18.2°C | 18.7°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 | 15°C | 18°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
July 22
July 23
July 24
July 25
July 26
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.