Rollins Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Rollins Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Rollins Reservoir today is 19.3°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 2 | 19.2°C | 21.5°C | |
| JUN 3 | 18.8°C | 21.5°C | |
| JUN 4 | 17.9°C | 21.5°C | |
| JUN 5 | 18.0°C | 21.5°C | |
| JUN 6 | 18.1°C | 21.5°C | |
| JUN 7 | 19.2°C | 21.5°C | |
| JUN 8 | 19.2°C | 21.5°C | |
| JUN 10 | 21.5°C | 19.4°C | |
| JUN 11 | 21.5°C | 19.5°C | |
| JUN 12 | 21.5°C | 19.6°C | |
| JUN 13 | 21.5°C | 19.7°C | |
| JUN 14 | 21.5°C | 19.9°C | |
| JUN 15 | 21.5°C | 20.0°C | |
| JUN 16 | 21.5°C | 20.1°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 | 5°C | 8°C | 11°C |
| February | 2°C | 6°C | 10°C |
| March | 6°C | 11°C | 17°C |
| April | 6°C | 11°C | 15°C |
| May | 13°C | 17°C | 21°C |
| June | 17°C | 22°C | 25°C |
| July | 22°C | 25°C | 28°C |
| August | 22°C | 25°C | 27°C |
| September | 21°C | 23°C | 26°C |
| October | 16°C | 19°C | 22°C |
| November | 11°C | 14°C | 17°C |
| December | 8°C | 11°C | 13°C |
Rollins Reservoir: Water Temperature by Location
Rollins Reservoir: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Rollins Reservoir, a Sierra Nevada foothills impoundment in California, can be quite cool even in summer. Surface temperatures in the warmest months often reach roughly 60–75°F (15–24°C) during mid-to-late summer at shallow, sun-exposed spots, but deeper water remains much colder. In spring and fall the surface typically ranges from about 45–60°F (7–15°C), and in winter it can drop to roughly 35–45°F (2–7°C) or approach near-freezing as ice and snow influence inflows. Because reservoirs stratify, thermocline layers and deep water can be substantially colder than surface readings, so temperature can change quickly when moving from shallows to deeper water.
Swimming is generally permitted at Rollins Reservoir and is a common summer activity in designated day-use areas, but there are practical restrictions and safety considerations. Local water agency rules may prohibit swimming near intakes, the dam, or other infrastructure, and lifeguards are typically not provided, so swimmers should exercise caution. Cold water shock, steep drop-offs, variable currents from releases, and frequent boat traffic make conditions more hazardous than they appear. Visitors should check posted regulations, choose supervised or well-trafficked spots, wear a life vest if uncertain, and avoid swimming alone, especially outside the warmest weeks of summer.