Blunn Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Blunn Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Blunn Reservoir today is 18.9°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 |
|---|---|---|---|
| SEP 15 | 20.6°C | 22.6°C | |
| SEP 16 | 20.6°C | 22.6°C | |
| SEP 17 | 20.9°C | 22.6°C | |
| SEP 18 | 20.6°C | 22.6°C | |
| SEP 19 | 20.7°C | 22.6°C | |
| SEP 20 | 20.1°C | 22.6°C | |
| SEP 21 | 19.9°C | 22.6°C | |
| SEP 22 | 19.7°C | 22.6°C | |
| SEP 23 | 22.6°C | 19.1°C | |
| SEP 24 | 22.6°C | 19.3°C | |
| SEP 25 | 22.6°C | 19.5°C | |
| SEP 26 | 22.6°C | 19.6°C | |
| SEP 27 | 22.6°C | 19.8°C | |
| SEP 28 | 22.6°C | 20.0°C | |
| SEP 29 | 22.6°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 | 0°C | 2°C | 5°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 7°C | 14°C |
| April | 5°C | 10°C | 16°C |
| May | 10°C | 15°C | 21°C |
| June | 15°C | 20°C | 25°C |
| July | 21°C | 26°C | 31°C |
| August | 21°C | 25°C | 30°C |
| September | 18°C | 23°C | 28°C |
| October | 13°C | 17°C | 20°C |
| November | 8°C | 11°C | 14°C |
| December | 2°C | 6°C | 9°C |
Blunn Reservoir: Water Temperature by Location
Blunn Reservoir: Weather Forecast
September 23
September 24
September 25
September 26
September 27
September 28
Location & Local Information
Blunn Reservoir’s water temperature depends heavily on its elevation, depth and the season. In spring the surface usually runs cold as snowmelt and runoff cool the basin, commonly about 35–55°F (2–13°C). Summer brings the warmest surface readings; shallow areas can warm to roughly 60–75°F (16–24°C) on sunny, calm days while deeper water stays cooler. By autumn, temperatures begin falling again into the 40–60°F (4–16°C) range as air temperatures drop and mixing increases. In winter, standing water may approach freezing and many Colorado reservoirs develop ice cover, with water temperatures at or near 32°F (0°C) at the surface while slightly warmer a few feet below.
Whether swimming is allowed at Blunn Reservoir is governed by local management and water-use rules rather than by temperature alone. Some reservoirs permit recreational swimming in summer when surface temperatures are more comfortable, but others prohibit swimming to protect drinking‑water supplies, aquatic habitat or for public-safety reasons such as steep drop-offs and cold-water shock. Even where permitted, there are safety considerations: cold surface or subsurface temperatures can cause hypothermia or muscle impairment, and lifeguards are typically not provided. Visitors should confirm current local regulations and advisories before entering the water.