Lake Murray — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Murray, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Murray today is 27.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| SEP 14 | 27.6°C | 29.0°C | |
| SEP 15 | 28.1°C | 29.0°C | |
| SEP 16 | 27.1°C | 29.0°C | |
| SEP 17 | 27.4°C | 29.0°C | |
| SEP 18 | 26.8°C | 29.0°C | |
| SEP 19 | 27.6°C | 29.0°C | |
| SEP 20 | 27.6°C | 29.0°C | |
| SEP 21 | 27.2°C | 29.0°C | |
| SEP 22 | 29.0°C | 27.3°C | |
| SEP 23 | 29.0°C | 27.4°C | |
| SEP 24 | 29.0°C | 27.5°C | |
| SEP 25 | 29.0°C | 27.6°C | |
| SEP 26 | 29.0°C | 27.7°C | |
| SEP 27 | 29.0°C | 27.7°C | |
| SEP 28 | 29.0°C | 27.8°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 | 14°C | 24°C | 32°C |
| February | 14°C | 23°C | 32°C |
| March | 16°C | 24°C | 32°C |
| April | 17°C | 25°C | 32°C |
| May | 20°C | 26°C | 32°C |
| June | 22°C | 27°C | 32°C |
| July | 24°C | 29°C | 33°C |
| August | 27°C | 30°C | 33°C |
| September | 26°C | 29°C | 32°C |
| October | 23°C | 28°C | 33°C |
| November | 17°C | 26°C | 33°C |
| December | 16°C | 20°C | 23°C |
Lake Murray: Water Temperature by Location
Lake Murray: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Murray in San Diego, California, experiences noticeable seasonal variation in surface water temperature. In winter months the surface often cools to roughly 50–60°F (10–15°C). Spring brings a gradual rise, with typical surface readings in the neighborhood of 55–68°F (13–20°C) as sunnier days warm the shallows. Peak warmth arrives in summer, when surface temperatures commonly reach about 70–80°F (21–27°C), especially in sheltered, shallow areas; deeper water remains cooler. Autumn sees a gradual decline back toward 60–75°F (16–24°C) as evening temperatures drop and inflows change. Local weather, wind, and reservoir level can shift these ranges, and short-term conditions may vary after heavy rain or prolonged heat.
Swimming at Lake Murray is generally not permitted. The reservoir is part of the regional water supply and managers restrict direct human contact to help protect water quality; safety concerns such as variable depths, submerged hazards, and limited lifeguard coverage are additional reasons for prohibitions. Visitors can still enjoy shoreline trails, picnicking, fishing, and non-motorized boating in designated areas where allowed, but anyone planning to enter the water should consult current signage and local authorities because rules and enforcement are maintained to safeguard public health and the reservoir’s role in supplying potable water.