Canberra received more than February's average rainfall on Sunday. It recorded 66.2mm by 2pm, compared with the average rainfall in Canberra for February of 51.2mm. Some parts of the city were hit by more than 60mm in just a few hours.

The deluge hit north Canberra hardest, caused flash flooding in parts of the city and forced several roads to close.

"The closure is to ensure the safety of all students and staff as the university conducts essential safety checks on infrastructure including bridges, creek banks and electrical switchboards," the university said.

ANU libraries will be closed and students have been told not to come to campus. Residential students were advised to stay away from affected areas, and staff should only come to campus if requested to do so for essential work.

"The university is experiencing significant flooding and power interruptions across the campus," it said in a note to students.

"The university has temporarily closed the area between Sullivans Creek Road and Melville Hall including the Chifley Library and ovals and grounds. Please keep clear of swollen waterways and do not enter flood water or creeks," the note said on Sunday.

Childcare centres on campus and University House will open as usual on Monday.

Students will be advised by course conveners of make-up arrangements for missed classes.

The university is expecting to re-open on Tuesday.

The ANU hotline will have up to date information on 1800 275 268.