Libraries & Hours

Find current library hours and real-time space availability.

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REGULAR HOURS

Plan your visit with up-to-date library hours for all Stony Brook University Library locations. View daily opening times, session schedules, and special service hours in one convenient place.

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Dec 15 – Dec 21, 2025

LIBRARIES & HOURS	DEC 15 MONDAY	DEC 16 TUESDAY	DEC 17 WEDNESDAY	DEC 18 THURSDAY	DEC 19 FRIDAY	DEC 20 SATURDAY	DEC 21 SUNDAY
Closed CAT Lab	9am – 5pm	9am – 5pm	9am – 5pm	9am – 5pm	Closed	Closed	Closed
Closed Central Reading Room	OPEN 24-HOURS	OPEN 24-HOURS	OPEN 24-HOURS	OPEN 24-HOURS	8:30am – 5pm Winter Session	Closed Winter Session	Closed Winter Session
Closed Health Sciences Library Staffed hours listed below. Library accessible 24/7 with SBU ID.	8:30am – 6pm Staffed (24/7 ID Access)	8:30am – 6pm Staffed (24/7 ID Access)	8:30am – 6pm Staffed (24/7 ID Access)	8:30am – 6pm Staffed (24/7 ID Access)	8:30am – 6pm Staffed (24/7 ID Access)	Closed 24/7 ID Access Only	Closed 24/7 ID Access Only
Closed Main Stacks/Interlibrary Loan	8:30am – 8pm	8:30am – 8pm	8:30am – 8pm	8:30am – 8pm	Closed Winter Session	Closed Winter Session	Closed Winter Session
Closed Music Library	9am – 5pm	9am – 5pm	9am – 5pm	9am – 5pm	Closed	Closed	Closed
Closed North Reading Room	8:30am – 8pm	8:30am – 8pm	8:30am – 8pm	8:30am – 8pm	8:30am – 8pm	12pm – 8pm	12pm – 8pm
Closed Southampton Library	9am – 5pm	9am – 5pm	9am – 5pm	9am – 5pm	9am – 5pm	Closed	Closed
Closed Special Collections	By Appointment	By Appointment	By Appointment	By Appointment	By Appointment	Closed	Closed

Semester Hours

Full semester Schedules

Winter 2026

Dec 19, 2025 – jan 24, 2026

Spring 2026

Jan 25, 2023 – May 20,2026

Summer 2026

May 21, 2026 – Aug 23, 2026

Live Space Utilization

Check real-time occupancy levels across library spaces using live sensor data. See which rooms are crowded, which have plenty of seating, and choose the best place to study before you arrive.

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Hourly Traffic (Typical vs Now)

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Chart room

Typical %

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Live Flow Data Disclaimer:
Occupancy data are based on anonymous entrance/exit sensors only. No Wi-Fi, Bluetooth, device, or personal data are collected.