Boston Library Hours: Complete 2025 Guide

Published: January 2, 2025 | 6 min read

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:

  1. MIT Libraries (24/7 for MIT community)
  2. Lamont Library at Harvard (24/7 for students)
  3. BU GSU Study Lounges (24 hours)
  4. Northeastern Snell (until 2 AM)