Deam Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Deam Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Deam 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 | 22.1°C | 20.5°C | |
| OCT 6 | 21.8°C | 20.5°C | |
| OCT 7 | 21.6°C | 20.5°C | |
| OCT 8 | 20.5°C | 20.5°C | |
| OCT 9 | 20.3°C | 20.5°C | |
| OCT 10 | 20.3°C | 20.5°C | |
| OCT 11 | 20.5°C | 20.5°C | |
| OCT 12 | 20.6°C | 20.5°C | |
| OCT 13 | 20.5°C | 20.0°C | |
| OCT 14 | 20.5°C | 20.1°C | |
| OCT 15 | 20.5°C | 20.1°C | |
| OCT 16 | 20.5°C | 20.1°C | |
| OCT 17 | 20.5°C | 20.1°C | |
| OCT 18 | 20.5°C | 20.2°C | |
| OCT 19 | 20.5°C | 20.2°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 | 1°C | 5°C | 10°C |
| February | 0°C | 5°C | 9°C |
| March | 4°C | 9°C | 15°C |
| April | 10°C | 15°C | 21°C |
| May | 13°C | 19°C | 24°C |
| June | 18°C | 23°C | 27°C |
| July | 23°C | 27°C | 30°C |
| August | 21°C | 26°C | 30°C |
| September | 20°C | 26°C | 31°C |
| October | 15°C | 21°C | 26°C |
| November | 6°C | 11°C | 15°C |
| December | 3°C | 8°C | 13°C |
Deam Lake: Water Temperature by Location
Deam Lake: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Deam Lake is a small reservoir in southern Indiana whose surface temperatures vary markedly with the seasons. In winter the lake commonly hovers around freezing, roughly 32–40°F (0–4°C). Spring brings a steady warming as runoff and air temperatures lift the surface into the 40–60°F range (4–16°C). By summer the surface typically reaches its highest values, often about 68–80°F (20–27°C) on warm days, though localized highs can be a few degrees warmer in shallow, sun-exposed bays. In autumn the water cools again, generally settling between about 50–65°F (10–18°C). Temperature profiles also vary by depth and by weather: warm, calm stretches produce a warm surface layer while deeper water stays markedly cooler.
Swimming at Deam Lake is not permitted; there is no designated public beach and park regulations prohibit swimming for safety and management reasons. The combination of steep drop-offs, underwater obstacles, variable water quality and the presence of recreational fishing and boating contributes to that restriction, and lifeguards are not provided. Visitors looking to cool off or enjoy water recreation typically use small craft, fishing, or visit other nearby sites with supervised swimming areas. Always check current park rules and posted signs before entering any body of water.