Michael J Kirwan Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Michael J Kirwan Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Michael J Kirwan Reservoir today is 27°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 6 | 25.2°C | 24.1°C | |
| AUG 7 | 25.2°C | 24.1°C | |
| AUG 8 | 25.3°C | 24.1°C | |
| AUG 9 | 25.4°C | 24.1°C | |
| AUG 10 | 27.0°C | 24.1°C | |
| AUG 11 | 27.1°C | 24.1°C | |
| AUG 12 | 27.1°C | 24.1°C | |
| AUG 14 | 24.1°C | 26.9°C | |
| AUG 15 | 24.1°C | 26.7°C | |
| AUG 16 | 24.1°C | 26.6°C | |
| AUG 17 | 24.1°C | 26.4°C | |
| AUG 18 | 24.1°C | 26.3°C | |
| AUG 19 | 24.1°C | 26.1°C | |
| AUG 20 | 24.1°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 | 0°C | 4°C | 7°C |
| February | 0°C | 4°C | 7°C |
| March | 1°C | 6°C | 10°C |
| April | 5°C | 11°C | 17°C |
| May | 12°C | 17°C | 21°C |
| June | 15°C | 19°C | 24°C |
| July | 21°C | 24°C | 28°C |
| August | 21°C | 24°C | 28°C |
| September | 21°C | 23°C | 26°C |
| October | 17°C | 20°C | 23°C |
| November | 6°C | 12°C | 17°C |
| December | 3°C | 6°C | 8°C |
Michael J Kirwan Reservoir: Water Temperature by Location
Michael J Kirwan Reservoir: Weather Forecast
August 13
August 14
August 15
August 16
August 17
August 18
Location & Local Information
Michael J. Kirwan Reservoir experiences typical temperate-lake seasonal shifts in surface temperatures. In winter the lake commonly approaches freezing, about 32–40°F (0–4°C). Spring warming generally brings surface values into the 40–60°F range (4–16°C) as ice melts and sun angles rise. Summer surface temperatures often peak between roughly 70–78°F (21–26°C), though occasional heat waves can push warmer; at the same time deeper water remains substantially colder, often 40–50°F (4–10°C), because the reservoir stratifies. In autumn the surface cools back to around 50–65°F (10–18°C) as turnover begins. These figures vary with weather, wind, inflows and exact sampling location on the reservoir.
Swimming at the Michael J. Kirwan Reservoir is generally not promoted in the way a staffed beach would be; there are no widely advertised public swimming beaches and open-water swimming is typically discouraged for safety and management reasons. Sudden depth changes, submerged hazards, boat traffic, cold deep water and water-quality or operational considerations related to reservoir management make unregulated swimming risky. Recreational use tends to focus on boating and fishing, and anyone considering entering the water should follow local posted rules and guidance from the managing agency.