Boston Library Hours: Complete 2025 Guide
Quick Facts
- 10,000+ libraries in our database across 50+ countries
- Updated monthly with verified opening hours
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Last Updated: December 2025 | Verified by Library Hours 24 Team
Boston Public Library System
Central Library (Copley Square)
- Monday-Thursday: 9 AM - 9 PM
- Friday-Saturday: 9 AM - 5 PM
- Sunday: 1 PM - 5 PM (Oct-May)
The iconic McKim Building and modern Johnson Building offer extensive research collections and study spaces.
MIT Libraries - 24/7 Access
MIT offers some of the best library hours in Boston:
- Hayden Library: 24/7 during term
- Barker Library: 24/7 reading room
- Dewey Library: Extended hours
Harvard Libraries
Widener Library Hours
- Monday-Thursday: 9 AM - 10 PM
- Friday: 9 AM - 5 PM
- Saturday: 9 AM - 5 PM
- Sunday: 12 PM - 7 PM
Lamont Library
24/7 access for Harvard ID holders during term
Northeastern - Snell Library
- Regular semester: Open until 2 AM
- Finals week: 24-hour access
- Weekend hours: Saturday 8 AM - 10 PM, Sunday 10 AM - 2 AM
Boston University Libraries
Mugar Memorial Library
- Monday-Thursday: 8 AM - 2 AM
- Friday: 8 AM - 11 PM
- Saturday: 10 AM - 11 PM
- Sunday: 10 AM - 2 AM
Late Night Study Options
For late-night studying in Boston:
- MIT Libraries (24/7 for MIT community)
- Lamont Library at Harvard (24/7 for students)
- BU GSU Study Lounges (24 hours)
- Northeastern Snell (until 2 AM)