Time in San Juan and Boston
The time difference between San Juan and Boston, Massachusetts is 1 hour. Boston is 1 hour behind San Juan.
This means 9am in San Juan is 8am in Boston and 5pm in San Juan is 4pm in Boston.
San Juan
- The current local time in San Juan is 12:57 am (November 10, 2026)
- San Juan is in the Atlantic Standard Time Zone
- The time zone offset for San Juan, Puerto Rico, is UTC-04:00
Boston
- The current local time in Boston is 11:57 pm (November 10, 2026)
- Boston is in the Eastern Standard Time Zone
- The time zone offset for Boston, United States, is UTC-05:00
How to convert San Juan time to Boston time?
Subtract 1 hour from San Juan time to get Boston time.
Time in San Juan
00:00
Time in Boston
00:00
Use the slider above to convert San Juan time to Boston time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| San Juan | Boston |
|---|---|
| 12am | 11pm |
| 1am | 12am |
| 2am | 1am |
| 3am | 2am |
| 4am | 3am |
| 5am | 4am |
| 6am | 5am |
| 7am | 6am |
| 8am | 7am |
| 9am | 8am |
| 10am | 9am |
| 11am | 10am |
| 12pm | 11am |
| 1pm | 12pm |
| 2pm | 1pm |
| 3pm | 2pm |
| 4pm | 3pm |
| 5pm | 4pm |
| 6pm | 5pm |
| 7pm | 6pm |
| 8pm | 7pm |
| 9pm | 8pm |
| 10pm | 9pm |
| 11pm | 10pm |