Clear skies and only a slight breeze made conditions almost perfect today for the competitors in the 87th Liffey Swim.
More than 300 men and women from throughout Ireland and abroad braved the famous river's murky depths for the annual 2.2km race (1.4 miles), which began early this afternoon.
The Guinness swim team came out tops in the men's race, clinching first and second prize, while Eastern Bay and Dublin swimming clubs were victorious in the women's event.
The Channel Islands were crowned champion in the international section, followed by the US and England.
Dublin Lord Mayor Paddy Bourke this week urged people to come out and support the annual spectacle, which started at Watling Street Bridge and finished at the Customs House.
This year, 213 Irish men and 114 Irish women competed with 11 swimmers from America, Canada, Australia, England, Scotland and the Channel Islands.
The youngest competitor, at just 13, was Lucy Gaynor, while other participants included Joe Oakes, who at 73 has completed many international challenges including the Bering Strait, the Dardenelles, the Strait of Gibraltar and the English Channel.
The first Liffey Swim took place in July 1920 with just 27 male contestants. The women's race was introduced in 1991.
Regarded as a true sporting challenge, it attracts some of the most talented swimmers from home and abroad.