All three callouts happened within 2 hours of each other.
A person has been rescued after their boat got stuck on the weir boom in Athlone.
The RNLI Lough Ree were called to the incident shortly after 1pm yesterday.
Lifeboat crews also helped five other people in two other incidents on Wednesday afternoon.
A boat with three passengers run aground on Lough Ree and two people were assisted when their boat starting taking on water in Lanesboro.
The volunteer organisation is asking people who get into difficulty on the water to contact the Coast Guard on VHF channel 16 or by dialling 999/112.