The boats based at the Lough Erne Yacht Club at Killadeas and Carrybridge were launched 23 times on Lough Erne during June, July and August.
The summer total of 106 launches across Northern Ireland was a slight drop on last year's total of 115.
Owen Medland, RNLI training divisional inspector said: "This has been another busy summer for the RNLI despite the unpredictable weather.
"There have been some stories of incredible bravery and also some stories of devastating loss," he added.
"In all cases our lifeboat volunteers have show extreme professionalism and commitment. Each and every callout is different and conditions, location, duration and activity can all vary," he stated.
"In many cases our volunteers are involved in call-out that go on for a number of hours throughout the night and then will have to go to work," said Mr. Medland.