What to Wear in San Antonio in August
August in San Antonio averages 97°F highs and 76°F lows — peak Texas summer heat on the River Walk, where the sunken promenade offers some shade but the heat radiates from the surrounding stone walls. With only about 5 rainy days, it's persistently hot and humid; natural fibers and light colors are essential. The River Walk scene and Alamo Plaza are most comfortable before 10am and after 7pm.
What to wear
top / Tank & Cami
tank top
breathable — lets heat escape in warm weather
bottom / Shorts
denim shorts
breathable fabric for high-heat days
lightweight linen pants for more coverage
footwear / Sandals
flat sandals
let feet breathe in the heat
white sneakers if you walk a lot
Based on typical August conditions in San Antonio. Weather varies year to year — check the live forecast when you're within two weeks of your trip.
August in San Antonio is the most demanding summer month — 97°F with South Texas humidity and overnight lows that barely drop below 76°F, meaning the heat barely relents even late into the evening. The San Antonio River Walk's sunken promenade offers some shade from surrounding walls and trees, but the stone surfaces radiate absorbed heat intensely in the afternoon. Outdoor dining on the River Walk is genuinely more comfortable after 7pm when temperatures begin to drop. San Antonio's Texas heritage casual aesthetic leans into its most breathable form in August: linen sundresses, cotton separates, and lightweight cowboy boots in lighter leather that breathes better than heavy styles. The River Walk's flat walking culture and the Alamo Plaza's exposed stone terrain both reward comfortable flat shoes. A light layer in the bag is the essential tool for transitioning between 97°F outdoor heat and aggressively air-conditioned River Walk restaurants and the visitor centers that provide cool refuges throughout the day.
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Frequently Asked Questions
What should I wear in San Antonio in August?+
San Antonio in August averages 97°F with South Texas humidity. Lightweight linen and cotton in light colors are the practical outdoor choices. Comfortable flat shoes for the River Walk promenade, a light layer for air-conditioned restaurants and the Alamo visitor center, and SPF for the exposed Alamo Plaza area are the August essentials.
How hot does San Antonio get in August?+
San Antonio averages 97°F in August with overnight lows of 76°F — peak summer heat that persists through the night. South Texas humidity combined with stone surfaces that radiate absorbed heat make the River Walk feel intense in afternoon hours. Only about 5 rainy days means there's little natural temperature relief from precipitation.
Is the River Walk comfortable in August?+
The San Antonio River Walk is most comfortable in August before 10am and after 7pm. The sunken promenade provides some shade from surrounding walls, but stone surfaces absorb and radiate heat intensely in the afternoon. Outdoor River Walk dining in late evening is genuinely pleasant as the stone cools and temperatures drop toward the high 80s.
What shoes should I wear in San Antonio in August?+
Flat, breathable shoes work best for San Antonio in August. The River Walk's flat paved promenade and the Pearl District's walkable blocks are comfortable in flat sandals or sneakers. The Alamo's stone plaza radiates heat intensely in afternoon sun — choose closed-toe or breathable footwear that doesn't trap heat at your feet.
What should I pack for San Antonio in August?+
Pack linen and lightweight cotton for San Antonio's August heat. A light cardigan for air-conditioned River Walk restaurants and visitor centers, flat comfortable shoes for the promenade, SPF for the Alamo Plaza and outdoor areas, and a reusable water bottle are the essentials. The Texas heritage aesthetic adapts to August through breathable separates and lighter-material cowboy boots.