Lake Sumner — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Sumner, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Sumner today is 18.4°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 | 20.2°C | 17.0°C | |
| OCT 6 | 20.2°C | 17.0°C | |
| OCT 7 | 19.4°C | 17.0°C | |
| OCT 8 | 19.7°C | 17.0°C | |
| OCT 9 | 19.4°C | 17.0°C | |
| OCT 10 | 19.2°C | 17.0°C | |
| OCT 11 | 18.9°C | 17.0°C | |
| OCT 12 | 18.0°C | 17.0°C | |
| OCT 13 | 17.0°C | 18.3°C | |
| OCT 14 | 17.0°C | 18.3°C | |
| OCT 15 | 17.0°C | 18.2°C | |
| OCT 16 | 17.0°C | 18.1°C | |
| OCT 17 | 17.0°C | 18.1°C | |
| OCT 18 | 17.0°C | 18.0°C | |
| OCT 19 | 17.0°C | 17.9°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 | 5°C | 11°C |
| February | 0°C | 6°C | 12°C |
| March | 1°C | 9°C | 17°C |
| April | 8°C | 14°C | 20°C |
| May | 14°C | 19°C | 23°C |
| June | 15°C | 20°C | 26°C |
| July | 20°C | 25°C | 30°C |
| August | 21°C | 26°C | 31°C |
| September | 18°C | 24°C | 29°C |
| October | 13°C | 17°C | 21°C |
| November | 6°C | 12°C | 17°C |
| December | 6°C | 9°C | 12°C |
Lake Sumner: Water Temperature by Location
Lake Sumner: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Lake Sumner, a reservoir on the Pecos River and a centerpiece of Sumner Lake State Park in New Mexico, experiences water temperatures typical of the high-desert climate near Fort Sumner. In the cool winter months, the surface water temperature ranges from the high 40s to the low 50s ext{F} (4∘C to 13∘C). During the long, peak summer season (July and August), the water warms considerably due to the intense sun, reaching a very comfortable range for swimming, typically peaking around 75∘F to 82∘F (24∘C to 28∘C).
Swimming is widely permitted and encouraged in Lake Sumner, as the State Park explicitly lists it as an available activity alongside boating and water skiing, confirming its status as a supported recreational site. Visitors often utilize various coves and shoreline areas for swimming, particularly the areas near the campgrounds. However, the State Park emphasizes that there are no designated or supervised public swimming beaches with lifeguards, meaning all swimming is undertaken strictly at one's own risk. Swimmers are advised to be aware of boat traffic, especially in open areas, and the potential for rapid changes in water levels common in reservoir lakes.