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San Antonio

San Antonio Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in San Antonio, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in San Antonio

83°F

TODAY

78°F

YESTERDAY

77°F

A WEEK AGO

As of today, the minimum water temperature in San Antonio is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.

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.

Analysis, Historical Data, and Forecast of Water Temperature

Water Temperature Chart in San Antonio Over the Last 30 Days

Today the water temperature in San Antonio is higher than the same day in previous years. The water temperature range here in July is from 63°F to 79°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

The forecasted water temperature values for San Antonio are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Daily Water Temperature Chart

DateCurrentAverageForecast
Jul 1977°F71°F
Jul 2078°F71°F
Jul 2177°F71°F
Jul 2278°F71°F
Jul 2378°F71°F
Jul 2478°F71°F
Jul 2578°F71°F
Jul 2683°F71°F
Jul 2771°F83°F
Jul 2871°F82°F
Jul 2971°F81°F
Jul 3071°F81°F
Jul 3171°F80°F
Aug 171°F80°F
Aug 271°F79°F
Aug 371°F78°F
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in San Antonio by Month

January

MinimumAverageMaximum
37°F49°F61°F

February

MinimumAverageMaximum
37°F51°F64°F

March

MinimumAverageMaximum
37°F56°F75°F

April

MinimumAverageMaximum
41°F59°F77°F

May

MinimumAverageMaximum
46°F65°F84°F

June

MinimumAverageMaximum
57°F70°F82°F

July

MinimumAverageMaximum
63°F71°F79°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram in San Antonio

San Antonio Weather

JULY 27

73°F / 99°F
light drizzle

rain: 28% | wind: 20 mph

JULY 28

73°F / 100°F
overcast

rain: 12% | wind: 15 mph

JULY 29

73°F / 100°F
overcast

rain: 5% | wind: 16 mph

JULY 30

77°F / 106°F
overcast

rain: 4% | wind: 12 mph

Water Temperature in San Antonio: General Trends and Swimming Opportunities

San Antonio, Texas, is home to a variety of water bodies, with temperatures in rivers, lakes, and other natural features fluctuating based on the season. The San Antonio River, which flows through the heart of the city, typically has warmer water during the summer, ranging from 75°F to 85°F (24°C to 29°C). While the river is popular for leisurely activities like walking along the riverwalk and enjoying the city’s scenic views, swimming in the San Antonio River itself is generally not encouraged. The river is more suited for sightseeing and kayaking rather than swimming due to urban runoff and occasional water quality concerns.

In addition to the river, San Antonio has several notable swimming destinations, such as the natural springs of the San Marcos River, located just outside the city, or the city's many public pools. For those seeking cooler, clearer water, the springs in areas like the Guadalupe River maintain a temperature range of 68°F to 72°F (20°C to 22°C) year-round, providing a refreshing option for swimming, tubing, and canoeing. The area's lakes, including Braunig Lake and Calaveras Lake, also offer more controlled environments for swimming, with water temperatures typically ranging from 80°F to 90°F (27°C to 32°C) in the summer months, making them ideal for a day of swimming or boating in a more serene atmosphere.

Overall, while the San Antonio River is a scenic spot for other activities, the city's lakes, spring-fed rivers, and public pools are the best options for swimming in the area.

Geographical Location of San Antonio

Frequently Asked Questions About San Antonio and its Water Temperatures

What is the current water temperature in San Antonio?

The water temperature today in San Antonio is 83°F (28.6°C).

What is the water temperature in San Antonio during the summer months?

The average water temperature in San Antonio during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in San Antonio in May?

The average water temperature in San Antonio in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in San Antonio in September?

The average water temperature in San Antonio in September is typically between 52°F to 66°F (11°C to 19°C).

Is it possible to swim in any bodies of water in San Antonio (United States, Texas), and what are the available options for doing so?

Yes, it's possible to swim in various bodies of water in San Antonio, Texas. Options include public pools, water parks, local rivers such as the San Antonio River, and natural springs like the San Pedro Springs Park.