Shadehill Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Shadehill Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Shadehill Reservoir today is 19.8°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 | 19.6°C | 19.0°C | |
| JUN 24 | 19.7°C | 19.0°C | |
| JUN 25 | 19.0°C | 19.0°C | |
| JUN 26 | 19.0°C | 19.0°C | |
| JUN 27 | 19.9°C | 19.0°C | |
| JUN 28 | 19.9°C | 19.0°C | |
| JUN 29 | 19.7°C | 19.0°C | |
| JUN 30 | 19.8°C | 19.0°C | |
| JUL 1 | 23.0°C | 20.0°C | |
| JUL 2 | 23.0°C | 20.1°C | |
| JUL 3 | 23.0°C | 20.3°C | |
| JUL 4 | 23.0°C | 20.4°C | |
| JUL 5 | 23.0°C | 20.6°C | |
| JUL 6 | 23.0°C | 20.8°C | |
| JUL 7 | 23.0°C | 20.9°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 | 1°C | 4°C |
| March | 0°C | 3°C | 6°C |
| April | 4°C | 8°C | 12°C |
| May | 7°C | 15°C | 23°C |
| June | 15°C | 19°C | 23°C |
| July | 19°C | 23°C | 27°C |
| August | 20°C | 24°C | 28°C |
| September | 16°C | 19°C | 22°C |
| October | 9°C | 14°C | 18°C |
| November | 4°C | 8°C | 10°C |
| December | 0°C | 2°C | 5°C |
Shadehill Reservoir: Water Temperature by Location
Shadehill Reservoir: Weather Forecast
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Location & Local Information
Shadehill Reservoir, often called Shadehill Lake, experiences pronounced seasonal shifts in surface water temperature. In spring (April–May) surface temperatures typically climb from about 40–60°F (4–16°C) as ice melts and runoff cools the water. By summer (June–August) the surface commonly warms to the mid‑70s to low‑80s °F, roughly 24–28°C, with occasional patches reaching the mid‑80s (≈29°C) in hot spells; deeper layers remain cooler beneath the thermocline. Autumn sees a steady cooling to roughly 50–65°F (10–18°C) before winter brings near‑freezing conditions around 32°F (0°C) and frequent ice cover, making open‑water swimming impractical. Local daily and weather variations can shift these ranges noticeably.
Swimming is generally permitted in recreational areas around Shadehill Reservoir because the lake is managed for multi‑use recreation, including bathing beaches, boating, and fishing, but rules and available designated swim sites vary by park unit. There are typically no lifeguards, and visitors should heed posted advisories about water quality, algal blooms, submerged hazards, sudden drop‑offs and boat traffic. In winter, ice thickness must be verified before any surface activity; in summer, swimmers should use caution near marinas and channels. Always follow on‑site signage and local regulations to ensure a safe swim.