Lake Poway — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Poway, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Poway today is 26.2°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 | 27.0°C | 29.0°C | |
| SEP 15 | 27.5°C | 29.0°C | |
| SEP 16 | 26.5°C | 29.0°C | |
| SEP 17 | 26.7°C | 29.0°C | |
| SEP 18 | 26.2°C | 29.0°C | |
| SEP 19 | 26.8°C | 29.0°C | |
| SEP 20 | 26.9°C | 29.0°C | |
| SEP 21 | 26.2°C | 29.0°C | |
| SEP 22 | 29.0°C | 26.3°C | |
| SEP 23 | 29.0°C | 26.5°C | |
| SEP 24 | 29.0°C | 26.6°C | |
| SEP 25 | 29.0°C | 26.8°C | |
| SEP 26 | 29.0°C | 26.9°C | |
| SEP 27 | 29.0°C | 27.0°C | |
| SEP 28 | 29.0°C | 27.2°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 | 18°C |
| February | 11°C | 15°C | 19°C |
| March | 10°C | 16°C | 22°C |
| April | 16°C | 19°C | 22°C |
| May | 18°C | 21°C | 24°C |
| June | 21°C | 24°C | 27°C |
| July | 23°C | 29°C | 35°C |
| August | 28°C | 31°C | 33°C |
| September | 26°C | 29°C | 32°C |
| October | 23°C | 25°C | 27°C |
| November | 17°C | 21°C | 25°C |
| December | 15°C | 17°C | 20°C |
Lake Poway: Water Temperature by Location
Lake Poway: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Poway, a small reservoir in Poway, California, typically has cool to mildly warm water that changes with the seasons and local weather. In winter months the surface temperature commonly falls into the roughly 50–60°F range (10–16°C). Spring brings gradual warming, often to about 55–65°F (13–18°C), while summer surface temperatures can reach roughly 65–75°F (18–24°C) on warm days. In autumn the water usually cools back toward the 60–70°F band (16–21°C). Actual temperatures vary day to day depending on air temperature, sunlight, wind, and depth; deeper water will remain colder than the surface.
Swimming in Lake Poway is not permitted. The lake is managed as a municipal reservoir and recreational area where restrictions are in place to protect water quality, reservoir infrastructure, and visitor safety. Prohibitions on swimming reduce contamination risk to the water supply and help avoid hazards associated with steep banks, submerged obstacles, and variable temperatures that can pose cold-shock risks. Visitors can still enjoy the lake from trails, picnic areas, and sanctioned boating or fishing activities where allowed, but entering the water is restricted by local regulations and signage.