San Marcos fires today: fire map, smoke & air quality
Active wildfires within 100 miles of San Marcos, the air quality and wind right now, fire-weather alerts — and how often fires burn near San Marcos.
Air quality and wind in San Marcos
Fire weather alerts for San Marcos
Wildfire history near San Marcos
Wildfires within 50 miles, by year
Fires of 10+ acres whose origin was within 50 miles of San Marcos. 2026 is still in progress.
When fires start near San Marcos
Peak months: June, July, August — 57% of fires in the last 10 years started in these three months.
0 days in the last 12 months had modeled daily PM2.5 above 35.4 µg/m³ — the level where air becomes unhealthy for sensitive groups. Smoke can come from fires hundreds of miles away, so smoke days and nearby fires don't always line up.
Fire history: NIFC WFIGS incident records 2016–2026. Smoke: Open-Meteo CAMS air-quality model, 2025-10-01 to 2026-09-30. Updated 2026-10-01.
Major fires near San Marcos this year
Largest wildfires near San Marcos since 2015
| Fire | Acres | Year | County | From San Marcos |
|---|---|---|---|---|
| Fairview | 28,307 | 2022 | Riverside, CA | 43 mi |
| Airport | 23,526 | 2024 | Orange, CA | 43 mi |
| Holy | 23,025 | 2018 | Orange, CA | 42 mi |
| Valley | 16,390 | 2020 | San Diego, CA | 38 mi |
| Cranston | 13,139 | 2018 | Riverside, CA | 45 mi |
| Border 3 | 7,609 | 2016 | San Diego, CA | 48 mi |
Most recent fires near San Marcos
| Fire | Acres | Discovered | Distance |
|---|---|---|---|
| Gustin | 30 | 2026-09-19 | 48 mi |
| Carousel | 11 | 2026-09-05 | 47 mi |
| Wood - Leave Open | 77 | 2026-08-25 | 47 mi |
| Chia | 51 | 2026-08-20 | 30 mi |
| Dehesa 7 | 94 | 2026-08-19 | 31 mi |
Distances are straight-line from the city center to the fire's point of origin.
Fires and smoke near other cities
Questions
Is there a fire near San Marcos right now?
The live map at the top of this page shows every active wildfire within 100 miles of San Marcos from official incident reports, sorted by distance, with acres, containment and the last update time.
How often do wildfires burn near San Marcos?
From 2016 to 2025, 216 wildfires of 10 acres or more started within 50 miles of San Marcos — about 22 a year — burning 186,036 acres in total. 57% of them started in June, July and August.
What was the biggest fire near San Marcos?
The Fairview Fire (2022), 28,307 acres, which started about 43 miles from San Marcos in Riverside County.
Is the air quality in San Marcos safe today?
The air-quality panel above shows the current US AQI for San Marcos and a 72-hour forecast. Above 100 (orange), sensitive groups should limit time outdoors; above 150 (red), everyone should. In the last 12 months San Marcos had 0 modeled smoke days.
Get fire alerts for San Marcos
Save San Marcos in Wildfire Tracker: distance to the nearest active fire, which side of it you're on relative to the wind, air quality — alerts only for fires that are actually active.