Magic Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Magic Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Magic Reservoir today is 15.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| OCT 5 | 15.0°C | 16.0°C | |
| OCT 6 | 15.2°C | 16.0°C | |
| OCT 7 | 15.5°C | 16.0°C | |
| OCT 8 | 15.2°C | 16.0°C | |
| OCT 9 | 15.1°C | 16.0°C | |
| OCT 10 | 14.5°C | 16.0°C | |
| OCT 11 | 14.6°C | 16.0°C | |
| OCT 12 | 15.1°C | 16.0°C | |
| OCT 13 | 16.0°C | 15.1°C | |
| OCT 14 | 16.0°C | 15.2°C | |
| OCT 15 | 16.0°C | 15.2°C | |
| OCT 16 | 16.0°C | 15.3°C | |
| OCT 17 | 16.0°C | 15.3°C | |
| OCT 18 | 16.0°C | 15.4°C | |
| OCT 19 | 16.0°C | 15.4°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 | 8°C | 12°C |
| February | 2°C | 7°C | 11°C |
| March | 5°C | 8°C | 11°C |
| April | 7°C | 10°C | 13°C |
| May | 10°C | 14°C | 19°C |
| June | 13°C | 18°C | 22°C |
| July | 18°C | 23°C | 28°C |
| August | 19°C | 24°C | 29°C |
| September | 15°C | 20°C | 25°C |
| October | 13°C | 16°C | 19°C |
| November | 5°C | 10°C | 15°C |
| December | 3°C | 7°C | 10°C |
Magic Reservoir: Water Temperature by Location
Magic Reservoir: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Magic Reservoir in south-central Idaho shows pronounced seasonal changes in surface water temperature. In winter months (December–February) the surface typically sits near freezing, roughly 32–40°F (0–4°C), and parts of the reservoir can ice over. Spring (March–May) brings cold, variable conditions as snowmelt and inflows keep temperatures in the roughly 40–55°F (4–13°C) range. Peak warmth is usually reached in summer (June–August) when surface readings commonly climb to about 60–75°F (16–24°C) on warm, calm days, although cooler years or windy conditions can keep temperatures lower. In autumn (September–November) the surface cools again to roughly 45–60°F (7–16°C). Deeper water stays considerably colder year-round and local factors such as inflows, dam releases, wind, and shading can produce strong variation across the reservoir.
Recreational swimming is commonly practiced at Magic Reservoir during the warmer months, and there are no widespread prohibitions specific to casual bathing; however, swimmers should be mindful that cold water shock and rapid temperature drops with depth are real hazards. Boat traffic, submerged structures, sudden drop-offs, and fluctuating water levels from dam operations also affect safety. For safe swimming, enter gradually, wear a personal flotation device if venturing beyond shallow areas, and check current conditions with local land managers before planning extended water activity.