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Free push alert when lightning approaches San Antonio. Your exact location and alerts live in the app.
Thunderstorm season in San Antonio
San Antonio, TX averages about 36 thunderstorm days a year — roughly 1.4× the US average of 25. Lightning activity peaks April–September, when Texas’s warm-season storms are most frequent.
- Thunderstorm days/yr
- 36
- Peak season
- April–September
- vs US average
- 1.4×
Source: NOAA / WMO climate normals — mean annual days with thunderstorms (1961–2010).
Lightning safety in San Antonio
When thunderstorms build over San Antonio, the distance to the nearest strike matters more than a city-wide count. Use the 30-30 rule: if thunder follows lightning by 30 seconds or less, get indoors, and wait 30 minutes after the last thunder before heading back out. StrikeCast surfaces the distance and trend so you can act before the storm reaches you.
Frequently asked
How far away is the nearest lightning to San Antonio?
StrikeCast shows the live distance in miles to the nearest strike near San Antonio, updated continuously from NOAA GOES-GLM satellite data, plus whether it is approaching or moving away.
Is it safe to be outside in San Antonio right now?
If you can hear thunder, you are close enough to be struck. Follow the 30-30 rule: shelter when thunder follows lightning by 30 seconds or less, and wait 30 minutes after the last thunder. StrikeCast's distance and trend help you decide before the storm arrives.
When is thunderstorm season in San Antonio?
San Antonio sees the most lightning April–September, averaging about 36 thunderstorm days a year.
Can I get lightning alerts for San Antonio?
Yes. Get the free StrikeCast app, save San Antonio, and you will get a push alert when lightning approaches — no need to keep the app open.