Rio Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Rio Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Rio Reservoir today is 25.2°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 |
|---|---|---|---|
| AUG 4 | 24.2°C | 24.5°C | |
| AUG 5 | 24.2°C | 24.5°C | |
| AUG 6 | 24.1°C | 24.5°C | |
| AUG 7 | 24.5°C | 24.5°C | |
| AUG 8 | 24.7°C | 24.5°C | |
| AUG 9 | 24.8°C | 24.5°C | |
| AUG 10 | 25.1°C | 24.5°C | |
| AUG 11 | 25.2°C | 24.5°C | |
| AUG 12 | 24.5°C | 25.2°C | |
| AUG 13 | 24.5°C | 25.1°C | |
| AUG 14 | 24.5°C | 25.1°C | |
| AUG 15 | 24.5°C | 25.1°C | |
| AUG 16 | 24.5°C | 25.0°C | |
| AUG 17 | 24.5°C | 25.0°C | |
| AUG 18 | 24.5°C | 25.0°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 | 0°C | 2°C | 5°C |
| February | 0°C | 1°C | 4°C |
| March | 0°C | 3°C | 7°C |
| April | 4°C | 9°C | 15°C |
| May | 11°C | 15°C | 19°C |
| June | 15°C | 19°C | 22°C |
| July | 18°C | 24°C | 30°C |
| August | 20°C | 25°C | 29°C |
| September | 18°C | 23°C | 27°C |
| October | 10°C | 15°C | 19°C |
| November | 4°C | 8°C | 12°C |
| December | 0°C | 4°C | 6°C |
Rio Reservoir: Water Temperature by Location
Rio Reservoir: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Rio Reservoir in New York typically behaves like many small northeastern reservoirs: surface water temperatures vary a lot through the year and stratification can keep deeper water substantially colder than the surface. Typical seasonal surface ranges are roughly 32–39°F (0–4°C) in winter when ice forms, 40–60°F (4–16°C) in spring as the lake mixes and warms, 68–77°F (20–25°C) in summer at the warmest surface layers on sunny, calm days, and 50–65°F (10–18°C) in autumn as the water cools and turnover begins. Even in summer, thermoclines and colder deep water mean sudden temperature changes can occur a short distance from shore; this is important for swimmer comfort and safety.
Swimming access at many New York reservoirs is often restricted or discouraged, and the same caution typically applies to Rio Reservoir. Restrictions arise because some reservoirs are part of municipal water supplies and must be protected from contamination, while others lack lifeguards, beaches, and hazard mitigation; safety concerns include cold-water shock, underwater debris, drop-offs, and occasional harmful algal blooms. Where permitted, swimming is usually unguarded and carries these risks, so checking local regulations and posted signs before entering the water is essential.