"This was another callout with a good outcome," said lifeboat helmsman Killian O’Kelly. "Animals are as prone as people to get in trouble in the water and we were glad to be able to help out on this occasion."
The RNLI said it responded to reports of a horse in the water off Murvagh Beach near Donegal town shortly after 5:40 p.m.
When crews arrived, they found the horse over a mile from shore, and gradually coaxed it back to its owner waiting on the beach.
Footage released by the RNLI Bundoran Lifeboat Station showed the rescue boat approaching the horse.
It took crew members nearly an hour to get the animal to head back to dry land.
RNLI press officer Shane Smyth told the Irish Times the town's lifeboat crew was unable to get too close to the animal out of fears it could have jumped into the boat.
“It could have turned out much worse, particularly if the horse’s head had gone under the water, it would not have been a nice outcome,” he told the news outlet.