Williamstown Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Williamstown Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Williamstown 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 |
|---|---|---|---|
| OCT 5 | 21.7°C | 22.5°C | |
| OCT 6 | 21.5°C | 22.5°C | |
| OCT 7 | 21.3°C | 22.5°C | |
| OCT 8 | 20.6°C | 22.5°C | |
| OCT 9 | 20.2°C | 22.5°C | |
| OCT 10 | 20.8°C | 22.5°C | |
| OCT 11 | 20.5°C | 22.5°C | |
| OCT 12 | 20.2°C | 22.5°C | |
| OCT 13 | 22.5°C | 20.1°C | |
| OCT 14 | 22.5°C | 20.3°C | |
| OCT 15 | 22.5°C | 20.4°C | |
| OCT 16 | 22.5°C | 20.5°C | |
| OCT 17 | 22.5°C | 20.6°C | |
| OCT 18 | 22.5°C | 20.8°C | |
| OCT 19 | 22.5°C | 20.9°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 | 9°C |
| February | 1°C | 4°C | 7°C |
| March | 4°C | 8°C | 13°C |
| April | 7°C | 13°C | 20°C |
| May | 8°C | 15°C | 22°C |
| June | 18°C | 23°C | 27°C |
| July | 19°C | 24°C | 29°C |
| August | 22°C | 27°C | 31°C |
| September | 21°C | 27°C | 32°C |
| October | 18°C | 23°C | 27°C |
| November | 11°C | 15°C | 18°C |
| December | 7°C | 9°C | 12°C |
Williamstown Lake: Water Temperature by Location
Williamstown Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Williamstown Lake in northern Kentucky experiences a typical temperate-lake seasonal cycle in surface water temperature. In spring the lake tends to warm from roughly 45–65°F (7–18°C) as air temperatures moderate, while summer surface readings commonly range from about 70–85°F (21–29°C) at peak warmth. During fall the water cools back to approximately 50–70°F (10–21°C) and in winter surface temperatures often hover near freezing up to about 32–45°F (0–7°C), with colder spells producing localized ice. These ranges can vary by year, weather patterns, and depth; deeper water remains cooler through summer and may stay just above freezing in sheltered basins during winter.
Swimming is practiced at Williamstown Lake during the warmer months because summer surface temperatures are generally comfortable for recreational bathing. Whether swimming is allowed at a specific spot depends on access and local rules: some shorelines and boat launches are private or managed, while others may permit public recreation. Safety and water-quality considerations also influence swimming; boat traffic, underwater hazards, weather, and occasional algal blooms or advisories can lead managers to post restrictions. Swimmers should use designated areas when available, observe signage and advisories, and exercise standard precautions such as wearing life jackets for non-swimmers and avoiding swimming alone.