Lake Success — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Success, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Success 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 |
|---|---|---|---|
| OCT 26 | 20.1°C | 23.0°C | |
| OCT 27 | 20.3°C | 23.0°C | |
| OCT 28 | 20.4°C | 23.0°C | |
| OCT 29 | 20.2°C | 23.0°C | |
| OCT 30 | 20.5°C | 23.0°C | |
| OCT 31 | 20.2°C | 23.0°C | |
| NOV 1 | 19.4°C | 17.9°C | |
| NOV 2 | 18.7°C | 17.9°C | |
| NOV 3 | 17.9°C | 18.9°C | |
| NOV 4 | 17.9°C | 18.9°C | |
| NOV 5 | 17.9°C | 18.8°C | |
| NOV 6 | 17.9°C | 18.8°C | |
| NOV 7 | 17.9°C | 18.7°C | |
| NOV 8 | 17.9°C | 18.7°C | |
| NOV 9 | 17.9°C | 18.6°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 | 8°C | 11°C | 15°C |
| February | 8°C | 12°C | 17°C |
| March | 8°C | 14°C | 21°C |
| April | 13°C | 17°C | 22°C |
| May | 17°C | 22°C | 27°C |
| June | 19°C | 23°C | 27°C |
| July | 25°C | 29°C | 33°C |
| August | 25°C | 29°C | 33°C |
| September | 23°C | 27°C | 31°C |
| October | 18°C | 23°C | 28°C |
| November | 13°C | 18°C | 22°C |
| December | 11°C | 13°C | 16°C |
Lake Success: Water Temperature by Location
Lake Success: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
Lake Success (Success Reservoir) in California is a man-made reservoir whose surface water temperatures vary with the seasons and local weather. In summer the surface often warms to about 70–85°F (21–29°C) on typical hot days, while spring and fall usually see milder surface readings around 55–70°F (13–21°C). In winter the reservoir can cool to roughly 45–55°F (7–13°C), and deeper water remains colder year-round. Temperatures can swing more widely during heat waves or extended rainy periods, and stratification means lower layers stay substantially cooler than the surface.
Swimming at Lake Success is frequently limited or discouraged rather than universally promoted. As a working reservoir with fluctuating water levels, submerged hazards, steep banks and active boat traffic, there are safety and water-quality reasons officials advise caution; occasional advisories for turbidity or algal conditions may further limit direct water contact. Some day-use or shoreline areas may permit wading or casual swimming when local rules and conditions allow, but visitors are advised to check current signage and local agency guidance before entering the water to ensure it’s permitted and safe.