Swimmers and water sports enthusiasts are being warned to take extra care this weekend as temperatures soar.
The Irish Coast Guard advised the public to keep water safety in mind when taking part in outdoor activities over the bank holiday and during the summer season.
Temperatures are expected to be as high as 22C (71.6F) on Saturday.
Chris Reynolds, director of the Irish Coast Guard, said: "With days getting longer, and sunny and warm weather forecast, our thoughts naturally go to enjoying the outdoors and outdoor activities.
"Whether you enjoy swimming, canoeing, surfing, angling, sail-boarding, always remember to wear a personal flotation device.
"Each year, the Irish Coast Guard is involved in many search and rescue incidents involving people in our seas, lakes and inland waterways.
"Wearing a personal flotation device isn't just common sense - it's the law."
Mr Reynolds said following basic advice will save lives.
Tips include never swimming alone or after drinking alcohol, familiarise yourself with a new area, check your equipment before you set off and never go out at dusk.