Alum Creek Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Alum Creek Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Alum Creek Reservoir today is 26.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| AUG 24 | 24.5°C | 25.5°C | |
| AUG 25 | 24.5°C | 25.5°C | |
| AUG 26 | 23.9°C | 25.5°C | |
| AUG 27 | 23.9°C | 25.5°C | |
| AUG 28 | 25.4°C | 25.5°C | |
| AUG 29 | 25.4°C | 25.5°C | |
| AUG 30 | 25.4°C | 25.5°C | |
| AUG 31 | 25.6°C | 25.5°C | |
| SEP 1 | 25.5°C | 26.1°C | |
| SEP 2 | 25.5°C | 26.0°C | |
| SEP 3 | 25.5°C | 26.0°C | |
| SEP 4 | 25.5°C | 26.0°C | |
| SEP 5 | 25.5°C | 26.0°C | |
| SEP 6 | 25.5°C | 25.9°C | |
| SEP 7 | 25.5°C | 25.9°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 | 3°C | 5°C |
| February | 0°C | 3°C | 6°C |
| March | 2°C | 6°C | 11°C |
| April | 4°C | 11°C | 18°C |
| May | 13°C | 17°C | 21°C |
| June | 17°C | 21°C | 25°C |
| July | 21°C | 25°C | 29°C |
| August | 22°C | 26°C | 29°C |
| September | 21°C | 26°C | 30°C |
| October | 15°C | 20°C | 25°C |
| November | 5°C | 10°C | 15°C |
| December | 2°C | 6°C | 10°C |
Alum Creek Reservoir: Water Temperature by Location
Alum Creek Reservoir: Weather Forecast
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September 6
Location & Local Information
Alum Creek Reservoir experiences typical Midwestern seasonal water temperatures that change markedly through the year. In winter the surface can approach freezing and often forms ice, with temperatures near 32°F (0°C) or colder in late season. Spring sees a gradual rise, commonly ranging from about 40–65°F (4–18°C) as the water stratifies. Summer brings the warmest conditions, with surface readings frequently between 70–85°F (21–29°C) and occasionally reaching the high 80s°F (around 30°C) during heat waves; deeper water remains cooler. During autumn the lake cools again, typically falling to roughly 45–65°F (7–18°C) before winter turnover. Short-term variations are common depending on recent weather, inflows and depth.
Swimming at Alum Creek is permitted in designated beach and swim areas during the park’s posted season, and those areas are managed for safety with rules and often lifeguards on duty when open. Swimming outside marked zones is discouraged because of boat traffic, variable depths and underwater hazards. Water-quality advisories, including occasional harmful algal bloom or bacterial warnings after heavy rains, can temporarily close swimming areas, so visitors should observe posted notices before entering the water.