What time zone is San Antonio in?

San Antonio uses Chile Standard Time (CLT, UTC−4) in winter and Chile Summer Time (CLST, UTC−3) in summer. Its IANA time zone is America/Santiago.

When is the next clock change in San Antonio?

Clocks in San Antonio move backward 1 hour on Sunday, April 4, 2027 at 12:00 AM, changing from CLST (UTC−03:00) to CLT (UTC−04:00)

Does San Antonio observe daylight saving time?

Yes. San Antonio observes daylight saving time: CLST (UTC−3) in summer and CLT (UTC−4) in winter.

What is the UTC offset of San Antonio?

San Antonio is UTC−4 in winter and UTC−3 in summer

Current Time in San Antonio, Valparaiso, Chile

6:14:45 AM

06:14:45

Wednesday, October 28, 2026

CLST (Chile Summer Time) · UTC−03:00

America/Santiago

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Time zone details

San Antonio is observing daylight saving time in 2026

Daylight in San Antonio

Sunrise6:50 AMSolar noon1:30 PMSunset8:10 PM

Next clock changeApr 4, 2027 · Clocks move back 1 hour · in 157 daysUpcomingView details Weather nowLoading current forecast…Forecast details

Location facts

Place

Country: Chile
Administrative area: Valparaiso
District: San Antonio Province
Place type: Populated place
Country currency: Chilean Peso (CLP)

Practical

Country languages: Spanish
Dialing code: +56
Population: 87,675
Elevation: Approximately 39 m (DEM estimate)

Geography

Geographic coordinates: 33° 35' S / 71° 36' W

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Convert San Antonio time

Compare San Antonio with another city or time zone

San Antonio follows the same clock and daylight-saving rules as Santiago

Popular conversions (current offsets)

San Antonio to GMTTarget time 3 hours ahead San Antonio to BRTTarget time Same time San Antonio to ARTTarget time Same time San Antonio to PYTTarget time Same time San Antonio to UYTTarget time Same time San Antonio to SRTTarget time Same time

All times shown relative to San Antonio local time

Clock changes in San Antonio

Next clock change

Upcoming

Sunday, April 4, 2027

12:00 AM CLST11:00 PM CLT

Clocks move back 1 hour

Sunday, April 5, 2026past
Daylight saving time ends
12:00 AM CLST11:00 PM CLT
Clocks move back 1 hour
Sunday, September 6, 2026past
Daylight saving time starts
12:00 AM CLT1:00 AM CLST
Clocks move forward 1 hour

Future clock changes, 2027–2030

Chile daylight saving time Clock changes worldwide

Sun & Moon details

Sunrise: 6:50 AM
Solar noon: 1:30 PM
Sunset: 8:10 PM
Daylight duration: 13 hr 20 min1 min 56 sec longer than the previous day

Civil twilight: 6:24 AM – 8:36 PM
Nautical twilight: 5:52 AM – 9:08 PM
Astronomical twilight: 5:20 AM – 9:40 PM

Waning GibbousMoon illumination92%

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Wednesday, October 28, 2026

View San Antonio on SavvyTime's time-zone map

Sun

Sunrise: 6:50 AM (east, 106.5°)
Sunset: 8:10 PM (west, 253.3°)
Day length: 13 hr 20 min1 min 56 sec longer than the previous day
Solar noon: 1:30 PM (69.7° altitude)

Civil twilight

Dawn to dusk: 6:24 AM – 8:36 PM

Additional twilight

Nautical dawn to dusk: 5:52 AM – 9:08 PM
Astronomical dawn to dusk: 5:20 AM – 9:40 PM

Moon

Phase: Waning Gibbous (92% illuminated)
Moonrise: 11:33 PM (northeast, 56.3°)
Moonset: 8:15 AM (northwest, 302.2°)
Previous principal phase: Full Moon — Monday, October 26, 2026 at 1:12 AM
Next principal phase: Third Quarter — Sunday, November 1, 2026 at 5:28 PM

Seven-day daylight outlook

Sunrise, sunset, and daylight for seven local dates
Local date	Sunrise	Sunset	Day length	Daily change
Wednesday, October 28	6:50 AM	8:10 PM	13 hr 20 min	1 min 56 sec longer than the previous day
Thursday, October 29	6:49 AM	8:11 PM	13 hr 22 min	1 min 54 sec longer than the previous day
Friday, October 30	6:48 AM	8:12 PM	13 hr 24 min	1 min 54 sec longer than the previous day
Saturday, October 31	6:47 AM	8:13 PM	13 hr 26 min	1 min 53 sec longer than the previous day
Sunday, November 1	6:46 AM	8:14 PM	13 hr 28 min	1 min 52 sec longer than the previous day
Monday, November 2	6:45 AM	8:15 PM	13 hr 30 min	1 min 51 sec longer than the previous day
Tuesday, November 3	6:44 AM	8:16 PM	13 hr 32 min	1 min 50 sec longer than the previous day

Weather forecast for San Antonio

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Plan around San Antonio

Upcoming national public holidays in Chile

Sat, Oct 31, 2026Reformation Day
Sun, Nov 1, 2026All Saints' Day
Tue, Dec 8, 2026Immaculate Conception

Nearby scheduled airports for San Antonio, Valparaiso, Chile

Comodoro Arturo Merino Benítez International AirportSCLLarge airport · Serves Santiago79.4 km east-northeast

Source: OurAirports record · SCL / SCEL

About 79.4 km (49.3 mi) east-northeast of San Antonio

Scheduled airline service in source data

View San Antonio area on map

Nearby places

Browse places in Chile

Frequently asked questions

What time zone is San Antonio in?: San Antonio uses Chile Standard Time (CLT, UTC−4) in winter and Chile Summer Time (CLST, UTC−3) in summer. Its IANA time zone is America/Santiago.
When is the next clock change in San Antonio?: Clocks in San Antonio move backward 1 hour on Sunday, April 4, 2027 at 12:00 AM, changing from CLST (UTC−03:00) to CLT (UTC−04:00)
Does San Antonio observe daylight saving time?: Yes. San Antonio observes daylight saving time: CLST (UTC−3) in summer and CLT (UTC−4) in winter.
What is the UTC offset of San Antonio?: San Antonio is UTC−4 in winter and UTC−3 in summer