Pilot reported a near midair collision with another aircraft while attempting to land at an airport ...

Narrative:

I was operating in the traffic pattern with a student at the end of a local training flight. The control tower was closed and we were announcing our position on CTAF. There were 3 or 4 other aircraft operating in the pattern and we made an entry into the left downwind for xxl. While in the downwind; aircraft Y called a 5 mile straight in final for xxl. As we began our base to follow aircraft Y; approximately 2.5 miles out; aircraft Z called a 6 mile final. We were descending from pattern altitude and made a call that we were on base and following aircraft Y. We made a call as we were intercepting final; however; aircraft Z continued and began to overtake us from 200 feet above as we were on an approximately 1 mile final and at 600 feet. I lost sight of aircraft Z and began an evasive descending left turn which I announced on CTAF. At around the same time; aircraft Z also made an evasive right 360. We reestablished in the downwind and announced that we would follow aircraft Z. Once we established adequate separation from aircraft Z; we began a left base and made an announcement on CTAF; at which point; aircraft a in the left downwind announced and began base turn inside of us. We once again made an evasive maneuver and re-intercepted final after a 360 turn.there are a few reasons the problem arose. Firstly; with no control tower and multiple airplanes in a closed pattern; the two straight in approaches caused a significant disruption to the flow of traffic. This was further exaggerated by the difference in performance/final approach speed of our aircraft compared to aircraft Z. Secondly; the temporary shortening of ZZZ's tower hours poses a safety risk as the volume of traffic after xa:00 local time would still justify control tower operations. In addition; many of the aircraft that operate out of ZZZ are less familiar with uncontrolled pattern operations and fail to follow prescribed procedures/right of way rules or use good judgment when approaching a busy pattern with multiple aircraft already operating.

Original NASA ASRS Text

Title: Pilot reported a NMAC with another aircraft while attempting to land at an airport where the tower was closed due to COVID-19 staffing.

Narrative: I was operating in the traffic pattern with a student at the end of a local training flight. The Control Tower was closed and we were announcing our position on CTAF. There were 3 or 4 other aircraft operating in the pattern and we made an entry into the left downwind for XXL. While in the downwind; Aircraft Y called a 5 mile straight in final for XXL. As we began our base to follow Aircraft Y; approximately 2.5 miles out; Aircraft Z called a 6 mile final. We were descending from pattern altitude and made a call that we were on base and following Aircraft Y. We made a call as we were intercepting final; however; Aircraft Z continued and began to overtake us from 200 feet above as we were on an approximately 1 mile final and at 600 feet. I lost sight of Aircraft Z and began an evasive descending left turn which I announced on CTAF. At around the same time; Aircraft Z also made an evasive right 360. We reestablished in the downwind and announced that we would follow Aircraft Z. Once we established adequate separation from Aircraft Z; we began a left base and made an announcement on CTAF; at which point; Aircraft A in the left downwind announced and began base turn inside of us. We once again made an evasive maneuver and re-intercepted final after a 360 turn.There are a few reasons the problem arose. Firstly; with no Control Tower and multiple airplanes in a closed pattern; the two straight in approaches caused a significant disruption to the flow of traffic. This was further exaggerated by the difference in performance/final approach speed of our aircraft compared to Aircraft Z. Secondly; the temporary shortening of ZZZ's Tower hours poses a safety risk as the volume of traffic after XA:00 local time would still justify control tower operations. In addition; many of the aircraft that operate out of ZZZ are less familiar with uncontrolled pattern operations and fail to follow prescribed procedures/right of way rules or use good judgment when approaching a busy pattern with multiple aircraft already operating.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1752406
Time
Date	202007
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft High Wing 1 Eng Retractable Gear
Flight Phase	Landing
Person 1
Function	Instructor
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 70 Flight Crew Total 530 Flight Crew Type 11
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance
Miss Distance	Horizontal 500 Vertical 200

Pilot reported a near midair collision with another aircraft while attempting to land at an airport where the tower was closed due to covid-19 staffing.