Lake Frederick — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Frederick, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Frederick today is 22°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 | 22.9°C | 24.0°C | |
| SEP 15 | 23.5°C | 24.0°C | |
| SEP 16 | 23.1°C | 24.0°C | |
| SEP 17 | 23.1°C | 24.0°C | |
| SEP 18 | 22.3°C | 24.0°C | |
| SEP 19 | 22.7°C | 24.0°C | |
| SEP 20 | 22.8°C | 24.0°C | |
| SEP 21 | 22.0°C | 24.0°C | |
| SEP 22 | 24.0°C | 22.1°C | |
| SEP 23 | 24.0°C | 22.2°C | |
| SEP 24 | 24.0°C | 22.3°C | |
| SEP 25 | 24.0°C | 22.4°C | |
| SEP 26 | 24.0°C | 22.5°C | |
| SEP 27 | 24.0°C | 22.6°C | |
| SEP 28 | 24.0°C | 22.7°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 | 2°C | 5°C | 8°C |
| February | 1°C | 5°C | 7°C |
| March | 2°C | 8°C | 13°C |
| April | 7°C | 13°C | 19°C |
| May | 15°C | 20°C | 25°C |
| June | 20°C | 24°C | 27°C |
| July | 24°C | 27°C | 30°C |
| August | 20°C | 26°C | 32°C |
| September | 21°C | 24°C | 27°C |
| October | 17°C | 20°C | 22°C |
| November | 7°C | 13°C | 17°C |
| December | 4°C | 6°C | 9°C |
Lake Frederick: Water Temperature by Location
Lake Frederick: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Frederick, a man-made reservoir in northern Virginia, typically shows a clear seasonal cycle in surface water temperature. In winter months the surface often hovers near freezing to the mid-40s °F (about 1–7 °C). Spring brings steady warming, with surface readings commonly in the mid-40s to mid-60s °F (7–18 °C) as air temperatures rise and stratification begins. During summer the shallow bays and surface layer can reach the 70s to mid-80s °F (21–29 °C), occasionally climbing toward 86 °F (30 °C) during heat waves. In fall the lake cools again, with surface temperatures generally falling through the 60s into the 50s °F (10–15 °C) as turnover approaches. Actual temperatures vary by depth, sun exposure and wind; deeper waters stay colder year-round and shallow coves heat up fastest.
Swimming at Lake Frederick is limited and generally discouraged because there is no designated public swim beach, no lifeguards, and routine water-quality monitoring for recreational swimming is not provided. The lake is primarily managed for boating, angling and wildlife, and local regulations or signage may prohibit or advise against wading and swimming for safety reasons and concern about bacterial contamination or harmful algal blooms after heavy rains. Visitors should check posted rules and conditions before entering the water and treat summer surface temperatures as comfortable only with appropriate precautions.