Lake Hamilton — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Hamilton, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Hamilton today is 25.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 | 26.1°C | 27.0°C | |
| SEP 15 | 25.9°C | 27.0°C | |
| SEP 16 | 25.9°C | 27.0°C | |
| SEP 17 | 25.7°C | 27.0°C | |
| SEP 18 | 25.8°C | 27.0°C | |
| SEP 19 | 25.7°C | 27.0°C | |
| SEP 20 | 25.8°C | 27.0°C | |
| SEP 22 | 27.0°C | 25.5°C | |
| SEP 23 | 27.0°C | 25.6°C | |
| SEP 24 | 27.0°C | 25.6°C | |
| SEP 25 | 27.0°C | 25.7°C | |
| SEP 26 | 27.0°C | 25.8°C | |
| SEP 27 | 27.0°C | 25.9°C | |
| SEP 28 | 27.0°C | 26.0°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 | 4°C | 9°C | 13°C |
| February | 4°C | 9°C | 14°C |
| March | 7°C | 13°C | 20°C |
| April | 12°C | 17°C | 21°C |
| May | 17°C | 22°C | 26°C |
| June | 19°C | 25°C | 30°C |
| July | 24°C | 29°C | 34°C |
| August | 24°C | 28°C | 32°C |
| September | 23°C | 27°C | 31°C |
| October | 20°C | 24°C | 27°C |
| November | 12°C | 17°C | 21°C |
| December | 6°C | 10°C | 13°C |
Lake Hamilton: Water Temperature by Location
Lake Hamilton: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
Lake Hamilton, located in Hot Springs in central Arkansas, is a large and popular reservoir formed on the Ouachita River. Its water temperature varies with the seasons, influenced by both local climate and flow from nearby hydroelectric dams. In winter, the surface temperature generally ranges between 7–11 °C (45–52 °F), too cold for swimming. During spring, as the weather warms, the lake’s temperature rises to about 15–21 °C (59–70 °F). By midsummer, Lake Hamilton reaches its warmest period, with surface waters averaging 25–30 °C (77–86 °F), while deeper sections remain several degrees cooler. In autumn, the water cools again to 15–20 °C (59–68 °F) as air temperatures drop and shorter days return.
Swimming in Lake Hamilton is allowed and very popular, particularly from late May through early September, when the water is warm and conditions are calm. The lake’s many coves, resorts, and public access points provide safe areas for swimming and recreation. The combination of warm summer water, scenic surroundings, and nearby amenities makes it one of the most visited lakes in the region. However, swimmers are advised to stay clear of boat channels and areas near the dam. Outside the summer months, cooler temperatures make swimming less comfortable, but Lake Hamilton remains active with boating and fishing year-round.