San Vicente Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in San Vicente Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in San Vicente Reservoir today is 31.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 |
|---|---|---|---|
| AUG 24 | 30.2°C | 30.1°C | |
| AUG 25 | 30.2°C | 30.1°C | |
| AUG 26 | 30.2°C | 30.1°C | |
| AUG 27 | 31.8°C | 30.1°C | |
| AUG 28 | 31.5°C | 30.1°C | |
| AUG 29 | 31.6°C | 30.1°C | |
| AUG 30 | 31.7°C | 30.1°C | |
| AUG 31 | 31.4°C | 30.1°C | |
| SEP 1 | 28.9°C | 31.3°C | |
| SEP 2 | 28.9°C | 31.2°C | |
| SEP 3 | 28.9°C | 31.0°C | |
| SEP 4 | 28.9°C | 30.9°C | |
| SEP 5 | 28.9°C | 30.8°C | |
| SEP 6 | 28.9°C | 30.7°C | |
| SEP 7 | 28.9°C | 30.5°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 | 10°C | 14°C | 19°C |
| February | 11°C | 15°C | 19°C |
| March | 14°C | 18°C | 22°C |
| April | 16°C | 22°C | 27°C |
| May | 20°C | 24°C | 27°C |
| June | 22°C | 25°C | 27°C |
| July | 24°C | 28°C | 32°C |
| August | 27°C | 30°C | 34°C |
| September | 26°C | 29°C | 31°C |
| October | 23°C | 26°C | 28°C |
| November | 17°C | 22°C | 26°C |
| December | 15°C | 17°C | 20°C |
San Vicente Reservoir: Water Temperature by Location
San Vicente Reservoir: Weather Forecast
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Location & Local Information
San Vicente Reservoir, often called Lake San Vicente in San Diego County, experiences moderate water temperatures that change with the seasons. Surface water in winter typically ranges around 50–55°F (10–13°C), with spring and fall commonly in the mid‑50s to mid‑60s°F (13–18°C). During summer months the surface can warm to roughly 65–75°F (18–24°C) on sunny days, though temperatures can be cooler earlier in the morning and substantially colder below the surface, where deeper water stays several degrees lower year‑round. These figures are approximate averages and vary with weather, inflow, and reservoir level.
Swimming at San Vicente is generally restricted because the reservoir serves as part of the regional water supply and is subject to public‑health and safety regulations. Restrictions are intended to protect drinking water quality, reduce risks from submerged hazards and boat traffic, and comply with local agency rules; lifeguards and designated swim areas are not typically provided. Visitors who want to enter the water should check current local regulations and posted notices, and consider alternative supervised swimming venues in the region if open‑water access is prohibited.