Key Dates & Deadlines
Below are some key Summer Sessions 2025 dates and deadlines. For additional dates, see the Academic Calendar.
Dates of Instruction
Summer Sessions at the University of Washington runs from mid-June through mid-August and is divided into two sessions, Session A and Session B. Each session lasts about four and a half weeks. Some courses span just one session, while others extend over both.
| Full Session | Session A | Session B |
|---|---|---|
| June 23 – August 22, 2025 | June 23 – July 24, 2025 | July 23 – August 22, 2025 |
Application Deadlines
High school students and nonmatriculated students — students not currently seeking a degree at the UW — need to apply to Summer Sessions before they can register for courses. Matriculated students do not need to apply before registering.
| Full Session | Session A | Session B | |
|---|---|---|---|
| Applications open | February 3, 2025 | February 3, 2025 | February 3, 2025 |
| Application deadline | June 22, 2025 | June 22, 2025 | July 23, 2025 |
Registration Deadlines
Registration dates and times are determined by your student status. You may make changes on MyUW any day following the assigned priority date.
| Full Session | Session A | Session B | |
|---|---|---|---|
| Registration Period I* | April 14 – May 22, 2025 | April 14 – May 22, 2025 | April 14 – May 22, 2025 |
| Registration Period II | May 23 – June 22, 2025 | May 23 – June 22, 2025 | May 23 – June 22, 2025 |
| Registration Period III** | June 23 – 29, 2025 | June 23 – 29, 2025 | June 23 – July 30, 2025 |
| $25 late registration fee begins | June 23, 2025 | June 23, 2025 | July 24, 2025 |
| $75 late registration fee begins | July 7, 2025 | July 7, 2025 | August 7, 2025 |
*Current UW graduate, professional and postbaccalaureate students; veterans; students with disabilities; and graduating UW seniors may begin registration at 6 a.m. on April 14. All other class standings, including nonmatriculated students (students not currently seeking a degree at the UW), new students and returning students may begin registration at 6 a.m. on April 16.
**ACCESS students and University staff using their exemption status may register at midnight beginning June 26. Washington state employees using their exemption status may register at midnight beginning June 27.
Add, Drop and Withdrawal Deadlines
For dates and deadlines regarding adding and dropping courses or withdrawing from Summer Sessions, see the Academic Calendar page.
