San Antonio — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in San Antonio, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in San Antonio today is 27.9°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 |
|---|---|---|---|
| JUN 6 | 26.6°C | 21.0°C | |
| JUN 7 | 26.6°C | 21.0°C | |
| JUN 8 | 26.6°C | 21.0°C | |
| JUN 10 | 27.3°C | 21.0°C | |
| JUN 11 | 27.8°C | 21.0°C | |
| JUN 12 | 27.8°C | 21.0°C | |
| JUN 13 | 27.9°C | 21.0°C | |
| JUN 14 | 21.0°C | 27.6°C | |
| JUN 15 | 21.0°C | 27.2°C | |
| JUN 16 | 21.0°C | 26.9°C | |
| JUN 17 | 21.0°C | 26.5°C | |
| JUN 18 | 21.0°C | 26.2°C | |
| JUN 19 | 21.0°C | 25.8°C | |
| JUN 20 | 21.0°C | 25.5°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 | 3°C | 12°C | 21°C |
| February | 3°C | 12°C | 22°C |
| March | 3°C | 15°C | 26°C |
| April | 5°C | 16°C | 27°C |
| May | 8°C | 19°C | 29°C |
| June | 14°C | 21°C | 28°C |
| July | 17°C | 23°C | 29°C |
| August | 17°C | 23°C | 29°C |
| September | 11°C | 20°C | 29°C |
| October | 8°C | 18°C | 28°C |
| November | 3°C | 15°C | 26°C |
| December | 14°C | 18°C | 22°C |
San Antonio: Weather Forecast
June 14
June 15
June 16
June 17
Location & Local Information
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.