San Marcos Regional
HYI · KHYI · Austin, Texas · Caldwell County · map
San Marcos Regional is a public-use airport owned by the City of San Marcos, 31 miles south of Austin, Texas, 595 feet above sea level. It has 3 runways; the longest, 08/26, is 6,330 feet of asphalt. It has a control tower and fuel (100LL avgas, Jet A with additive).
Weather right now KHYI · observed 2:56 pm CDT (19:56 UTC), 42 minutes ago
VFR good flying weather
- Wind variable at 5 knots
- Visibility 10 miles or more
- Temperature 89°F (32°C), dew point 60°F (16°C)
- Altimeter 29.96 inHg
No terminal forecast is issued for this station. The nearest forecast is usually at the closest larger airport.
The codes as issued (METAR and TAF)
METAR KHYI 061956Z VRB05KT 10SM CLR 32/16 A2996 RMK AO2 SLP137 T03170156
From the National Weather Service's aviation weather service, refreshed every few minutes; times are local to the airport with UTC in brackets. For a flight, get your briefing from Flight Service or an approved provider.
The airport
- Codes
- FAA HYI · ICAO KHYI
- Kind
- Airport · open to the public · publicly owned
- Owner
- City of San Marcos
- Elevation
- 595 feet above sea level
- Control tower
- A control tower · 7:00 am to 9:00 pm effective 01 apr 2021
- Attended
- every day, 7:00 am to 9:00 pm
- Lights
- runway lights see the remarks below; beacon sunset to sunrise
- Fuel
- 100LL avgas, Jet A with additive
- Repairs
- airframe: major repairs; engine: major repairs
- Parking
- hangar, tiedown
- On the chart
- San Antonio sectional
- Magnetic variation
- 7E
- In the FAA's files since
- May 1965
Runways 3
For understanding the field, not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 08/26 | 6,330 × 100 ft | Asphalt, good | Medium-intensity lights |
| 13/31 | 5,601 × 100 ft | Asphalt, good | Medium-intensity lights |
| 17/35 | 5,214 × 100 ft | Asphalt, good | Medium-intensity lights |
- Runway 08: hangar 25 ft high 201 ft from the end
- Runway 26: crops 29 ft high 732 ft from the end
- Runway 13: ILS, PAPI, two lights on the left, medium-intensity approach lights (MALS)
- Runway 31: PAPI, two lights on the left
- Runway 17: PAPI, two lights on the left
Radio frequencies
| Common traffic advisory (CTAF) · Tower | 126.825 | San Marcos |
| ATIS (recorded airport information) | 120.825 | San Marcos |
| Clearance delivery · Ground | 120.125 | San Marcos |
| Clearance delivery When hyi tower closed | 121.35 | San Marcos |
| Departure procedure (AEROZ) · Approach and departure · Departure procedure (BNDIA) 8,000-12,000 feet | 119.0 | San Marcos |
| Szagi and star SFC-7000 feet | 118.15 | San Marcos |
| Blewe and star · Gaboo and star · Potrr and star | 127.225 | San Marcos |
Automated weather (AWOS-3PT), by phone 512-353-8005.
Wind map live wind over the area, from Windy.com
Colours show wind speed, the moving lines its direction; drag the time bar for the coming days. Map and forecast by Windy.com.
Aircraft registered in Austin from the FAA register
788 aircraft are registered to owners in Austin, Texas: 483 piston singles, 85 business jets, 48 turboprops, 48 drones, 44 helicopters. Not every one of them is based at this airport; the based-aircraft count above is the FAA's figure for this airport alone.
Companies and organisations in town with two or more aircraft:
Individuals are counted, never named. All aircraft registered in Texas.
Accidents and incidents at or near this airport NTSB records · 16 since 1982, 3 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English.
Nearby within 30 nautical miles
The FAA's remarks as written in the airport file
- Established prior to 1940.
- Mals runway 13; medium-intensity runway lights runways 08/26, 13/31 and 17/35 preset low intst; to activate and incr intst - the common traffic frequency.
- 100LL self service; 100 LL and jet a+ available full serve.
- 6 feet fence 130-199 feet dstc, 360 feet L.
- Apn all ireg surface.
- Birds and wildlife on and in the vicinity of airport.
- Transient aircraft parking available on the FBO (fixed-base operator) ramp only. All otr ramp areas resd for based aircraft or rqr prior cdn with airport mgmt.
Facts from the FAA's airport file effective October 1, 2026, written out in plain English; weather from the National Weather Service's aviation weather service; registered aircraft from the FAA register as of October 5, 2026; accidents from the NTSB's public database. Owners are shown only when they are an organisation; no person is named. Check the official sources before a flight: this page is for understanding an airport, not for planning one.