Bantam Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bantam Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bantam Lake today is 20.5°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 | 21.7°C | 21.5°C | |
| SEP 15 | 21.7°C | 21.5°C | |
| SEP 16 | 20.9°C | 21.5°C | |
| SEP 17 | 20.0°C | 21.5°C | |
| SEP 18 | 19.8°C | 21.5°C | |
| SEP 19 | 20.7°C | 21.5°C | |
| SEP 20 | 21.5°C | 21.5°C | |
| SEP 21 | 20.5°C | 21.5°C | |
| SEP 22 | 21.5°C | 20.6°C | |
| SEP 23 | 21.5°C | 20.6°C | |
| SEP 24 | 21.5°C | 20.7°C | |
| SEP 25 | 21.5°C | 20.7°C | |
| SEP 26 | 21.5°C | 20.8°C | |
| SEP 27 | 21.5°C | 20.8°C | |
| SEP 28 | 21.5°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 | 0°C | 2°C | 4°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 3°C | 7°C |
| April | 5°C | 9°C | 13°C |
| May | 10°C | 15°C | 20°C |
| June | 13°C | 17°C | 21°C |
| July | 17°C | 23°C | 29°C |
| August | 20°C | 23°C | 26°C |
| September | 18°C | 22°C | 25°C |
| October | 13°C | 16°C | 19°C |
| November | 7°C | 10°C | 13°C |
| December | 2°C | 5°C | 8°C |
Bantam Lake: Water Temperature by Location
Bantam Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Bantam Lake, the largest natural lake in Connecticut, experiences typical New England seasonal shifts in surface water temperature. In spring, surface temperatures commonly range from about 40–65°F (4–18°C) as the lake stratifies and warms. Summer brings the warmest surface conditions, often between roughly 68–78°F (20–26°C) on sunny days, though shallow coves warm faster and deeper water remains noticeably cooler. Early fall sees a gradual decline to about 55–70°F (13–21°C) while winter temperatures approach freezing, frequently around 28–34°F (-2 to 1°C) with occasional ice cover. Actual temperatures vary with recent weather, wind, water depth and time of day, so measured values at a particular spot can differ from general seasonal ranges.
Swimming at Bantam Lake is commonly practiced and permitted in many areas because the lake is used for recreation and offers shallow, accessible shorelines that reach comfortable summer temperatures. However, there are no universal swimming rules for the entire shoreline: some spots are public, some private, and safety or water-quality advisories can temporarily restrict swimming. Seasonal issues such as harmful algal blooms after warm, calm periods or runoff after heavy rains may prompt closures, and lifeguards are not always present, so swimmers should follow posted signs, check local advisories, and exercise usual water-safety precautions.