Stillwater Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Stillwater Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Stillwater Reservoir today is 22.2°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 |
|---|---|---|---|
| AUG 24 | 19.7°C | 22.4°C | |
| AUG 25 | 19.6°C | 22.4°C | |
| AUG 26 | 19.6°C | 22.4°C | |
| AUG 27 | 19.6°C | 22.4°C | |
| AUG 28 | 19.6°C | 22.4°C | |
| AUG 29 | 20.7°C | 22.4°C | |
| AUG 30 | 20.7°C | 22.4°C | |
| AUG 31 | 20.4°C | 22.4°C | |
| SEP 1 | 19.5°C | 22.1°C | |
| SEP 2 | 19.5°C | 21.9°C | |
| SEP 3 | 19.5°C | 21.8°C | |
| SEP 4 | 19.5°C | 21.7°C | |
| SEP 5 | 19.5°C | 21.5°C | |
| SEP 6 | 19.5°C | 21.4°C | |
| SEP 7 | 19.5°C | 21.3°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 | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 7°C | 12°C |
| May | 7°C | 12°C | 16°C |
| June | 12°C | 17°C | 21°C |
| July | 17°C | 23°C | 29°C |
| August | 19°C | 22°C | 25°C |
| September | 16°C | 20°C | 23°C |
| October | 11°C | 14°C | 17°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 4°C | 7°C |
Stillwater Reservoir: Water Temperature by Location
Stillwater Reservoir: Weather Forecast
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September 4
September 5
September 6
Location & Local Information
Stillwater Reservoir, located in the Adirondacks of northern New York, stays noticeably cooler than many lowland lakes because it is relatively deep, fed by cold streams, and surrounded by forested shorelines. Surface temperatures typically run from near freezing in winter when ice often forms (around 32°F / 0°C) to spring readings in the 34–55°F range (1–13°C) as snowmelt and weather moderate. In midsummer the warmest surface temperatures commonly reach roughly 60–75°F (15–24°C) on sunny, calm days, while autumn sees a steady decline back into the 45–60°F band (7–15°C) as air temperatures fall and turnover begins.
Swimming is commonly practiced at campsites and along accessible shorelines, so in that sense it is allowed, but there are few formal sandy beaches or lifeguarded areas. Because the reservoir is managed for multiple uses (boating, fishing, camping) and because cold, deep water, sudden drop-offs, submerged structure, and boat traffic can create hazards, swimmers should exercise caution, wear a life jacket if appropriate, and heed any posted rules or advisories. In winter the ice makes swimming unsafe except for controlled, well-prepared activities; during summer, short swims are popular but the water remains cooler than many inland recreational lakes.