Standley Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Standley Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Standley Lake today is 20°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 |
|---|---|---|---|
| SEP 16 | 22.3°C | 23.6°C | |
| SEP 17 | 22.8°C | 23.6°C | |
| SEP 18 | 22.4°C | 23.6°C | |
| SEP 19 | 22.5°C | 23.6°C | |
| SEP 20 | 22.1°C | 23.6°C | |
| SEP 21 | 21.2°C | 23.6°C | |
| SEP 22 | 20.8°C | 23.6°C | |
| SEP 24 | 23.6°C | 20.2°C | |
| SEP 25 | 23.6°C | 20.4°C | |
| SEP 26 | 23.6°C | 20.5°C | |
| SEP 27 | 23.6°C | 20.7°C | |
| SEP 28 | 23.6°C | 20.9°C | |
| SEP 29 | 23.6°C | 21.1°C | |
| SEP 30 | 23.6°C | 21.3°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 | 0°C | 2°C | 5°C |
| February | 0°C | 4°C | 8°C |
| March | 0°C | 7°C | 15°C |
| April | 6°C | 12°C | 17°C |
| May | 10°C | 16°C | 22°C |
| June | 16°C | 21°C | 26°C |
| July | 21°C | 26°C | 32°C |
| August | 21°C | 26°C | 32°C |
| September | 19°C | 24°C | 29°C |
| October | 13°C | 17°C | 21°C |
| November | 8°C | 11°C | 13°C |
| December | 2°C | 6°C | 10°C |
Standley Lake: Water Temperature by Location
Standley Lake: Weather Forecast
September 23
September 24
September 25
September 26
September 27
September 28
Location & Local Information
Standley Lake, a reservoir in the Denver metro area, experiences pronounced seasonal changes in surface water temperature driven by elevation and local climate. In winter the surface commonly sits near freezing, roughly 32–40°F (0–4°C), and ice can form in prolonged cold spells. Spring typically warms from about 40–60°F (4–15°C) as runoff and sunnier days raise temperatures. By summer, surface waters often reach the mid-60s to mid-70s Fahrenheit (about 18–24°C) on warm afternoons, though shallow bays may warm slightly more and deeper water layers remain significantly cooler. Autumn brings a steady decline, with temperatures generally falling back into the 45–60°F (7–15°C) range. Because Standley Lake is a reservoir with varying depth and limited mixing, temperatures can change quickly with weather and the deeper strata stay cold year-round.
Swimming at Standley Lake is not permitted; the reservoir serves as part of the municipal water supply and park rules prohibit entering the water for public-health and safety reasons. In addition to water-quality protection, there are safety concerns such as cold water, underwater hazards and the absence of lifeguarded swim areas. Recreational uses allowed around the lake focus on boating, fishing and shoreline activities in designated areas, while signage and park regulations are used to enforce the no‑swimming policy.