San Marcos, Texas Weather
San Marcos, Texas — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery for San Marcos, Hays County.
Flight conditions near San Marcos. Data source: locating…
About San Marcos, Texas
San Marcos, Texas, unfolds in a landscape of gentle hills that cradle the San Marcos River, a ribbon of clear, cool water that defines the very spirit of the place. It lies 8.3 miles south-south-west of Kyle, TX (from Kyle, TX: bearing 208°T), and is situated 5.4 miles north-north-west of Redwood. The sun here has a particular quality, a slow descent that bleeds amber and rose across the scrubby oaks and mesquite trees dotting the terrain, casting long, soft shadows that seem to whisper of forgotten afternoons. The air, especially in the late spring, carries the faint, sweet scent of wildflowers and the humid promise of summer storms, a constant, subtle reminder of the earth’s enduring pulse. This is a place where the horizon feels close, yet expansive, a deceptive invitation to both intimacy and adventure. The history of San Marcos is deeply entwined with the San Marcos River, a vital artery for indigenous peoples long before settlers arrived. The founding of the city, spurred by its strategic location and the abundant water, eventually saw it grow into a hub for education and commerce. Texas State University now stands as a prominent landmark, its presence infusing the town with a youthful energy that contrasts with the enduring quiet of its historic downtown buildings. The local economy, once rooted in agriculture and manufacturing, now thrives on a blend of education, tourism drawn to the river's natural beauty and the unique shops and eateries, and a burgeoning tech presence, all contributing to a distinctive, unhurried rhythm of life.
Live animated radar for San Marcos and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | San Marcos, Hays County, Texas |
| Coordinates | 29.883275°N, 97.941394°W |
| Timezone | Central Time (America/Chicago) |
| ZIP Code(s) | 78666, 78667 |
| Area Code | 512, 737 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This San Marcos, Texas Weather Page
This page provides live weather conditions and forecasts for San Marcos, Texas, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modeled estimate shown when no station is in range), precipitation radar and NOAA GOES-16 satellite imagery. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for San Marcos includes coordinates 29.883275°N, 97.941394°W, situated in Hays County. ZIP code 78666, 78667. Telephone area code: 512, 737. Timezone: Central Time (America/Chicago).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov (NOAA), with a modeled estimate used where no nearby reporting station is available. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
