Volunteer lifeboat crews at the two RNLI stations in Mayo launched 21 times last year, bringing 16 people to safety.
The RNLI operates lifeboat stations at Ballyglass and Achill Island.
Nationally, RNLI lifeboats launched 945 times last year - with half of these call-outs during the Summer months of June, July and August.
Volunteer lifeboat crews are preparing for another busy Summer, as people are expected to enjoy domestic holidays due to Covid-19 restrictions on overseas travel.
The charity cannot hold its usual fundraising collections during the pandemic, but is running a Mayday Mile campaign, which begins this Saturday and will run for the month of May.
People are asked to walk, run or cycle a mile for raise funds for the RNLI.