Guam to San Francisco Time Difference
🇬🇺 Guam is currently 17 hours behind of 🇺🇸 San Francisco. This difference varies between 18h and 17h due to Daylight Saving Time.
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Atin 🇬🇺 Guam→it will be—in 🇺🇸 San Francisco
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Difference
-17h
Business overlap
2h
Distance
9,337 km
Approx. flight
11h
Hour-by-Hour: Guam to San Francisco
| 🇬🇺 Guam | 🇺🇸 San Francisco | Note |
|---|---|---|
| 12:00 AM | 7:00 AM | |
| 1:00 AM | 8:00 AM | |
| 2:00 AM | 9:00 AM | |
| 3:00 AM | 10:00 AM | |
| 4:00 AM | 11:00 AM | |
| 5:00 AM | 12:00 PM | |
| 6:00 AM | 1:00 PM | |
| 7:00 AM | 2:00 PM | |
| 8:00 AM | 3:00 PM | |
| 9:00 AM | 4:00 PM | |
| 10:00 AM | 5:00 PM | |
| 11:00 AM | 6:00 PM | |
| 12:00 PM | 7:00 PM | |
| 1:00 PM | 8:00 PM | |
| 2:00 PM | 9:00 PM | |
| 3:00 PM | 10:00 PM | |
| 4:00 PM | 11:00 PM | |
| 5:00 PM | 12:00 AM(next day) | Next day |
| 6:00 PM | 1:00 AM(next day) | Next day |
| 7:00 PM | 2:00 AM(next day) | Next day |
| 8:00 PM | 3:00 AM(next day) | Next day |
| 9:00 PM | 4:00 AM(next day) | Next day |
| 10:00 PM | 5:00 AM(next day) | Next day |
| 11:00 PM | 6:00 AM(next day) | Next day |
Daylight Saving Time (DST)
San Francisco observes Daylight Saving Time, while Guam does not. This causes the time difference to shift between 18 hours behind and 17 hours behind depending on the season. Currently, Guam is 17 hours behind relative to San Francisco.
Min difference
18h
Max difference
17h
Best Meeting Times
There are 2 overlapping business hours between Guam and San Francisco (9 AM – 6 PM in each city).
🇬🇺 Guam
9:00 AM – 11:00 AM
🇺🇸 San Francisco
4:00 PM – 6:00 PM
Frequently Asked Questions
What is the time difference between Guam and San Francisco?
The time difference between Guam and San Francisco is currently 17 hours behind. Guam uses GMT+10 (UTC+10), while San Francisco uses PDT (UTC-7). This difference varies seasonally due to Daylight Saving Time, ranging from 18 hours behind to 17 hours behind.
When it's noon in Guam, what time is it in San Francisco?
When it's 12:00 PM (noon) in Guam, it is 7:00 PM in San Francisco. Use our calculator above to convert any other time.
Does the time difference between Guam and San Francisco change?
Yes, the time difference changes throughout the year. Because San Francisco observes Daylight Saving Time, the offset shifts between 18 hours behind and 17 hours behind at different times of the year.
What are the best times to schedule a call between Guam and San Francisco?
The best time to call is between 9:00 AM and 11:00 AM in Guam (which is 4:00 PM – 6:00 PM in San Francisco). This 2-hour window falls within business hours in both cities.
Is Guam ahead or behind San Francisco?
Guam is currently 17 hours ahead of San Francisco.
What time zone is Guam in?
Guam is in the Pacific/Guam time zone, currently using GMT+10 (UTC+10). Guam does not observe Daylight Saving Time.
What time is midnight in Guam in San Francisco?
When it is midnight (12:00 AM) in Guam, it is 7:00 AM in San Francisco.