Welcome to Leinster Open Sea

We are a not for profit organisation working with swimming clubs to establish a summer season of open sea races in a variety of locations along the Leinster. We cater for all ages and abilities from teenagers to senior citizens and from novice swimmers to former internationals.

If you are new to Leinster Open Sea swimming, please see our information for first time swimmers. Swim races are held every weekend with an average distance of 1 mile. For swim locations and start times see our race calendar.

There are four annual major swims: the Dublin City Liffey Swim, the Dún Laoghaire Harbour Race, the Lough Dan Races and the Island Race (from Ireland’s Eye to Howth). For background information and the history of these swims, click the links above. For up-to-date race information, including race dates, entry fees, closing dates and how to register, click here.

So if you like a challenge, keeping fit and enjoy meeting people of all levels of swimming ability – we’d love to have you join us on one of our many sea swims during the summer months.

Entry Forms for Big Swims

The entry to the big swims on the calendar will be done through the Fit Live Website .

Entry Form for Dún Laoghaire Harbour Race Sunday 13 August

Leinster Swimmers
Swimmers Living in Ulster, Connacht or Munster
Overseas Swimmers

Different entry rules for swimmers from Leinster, Ulster, Connacht or Munster and Overseas Swimmers

Entry Form for Wicklow 3k Saturday 19 August

All Swimmers

Entry Form for Lough Dan Races Saturday 26 August

All Swimmers

Jones Engineering 98th Dublin City Liffey Swim Saturday 9 September

Leinster Swimmers
Swimmers Living in Ulster, Connacht or Munster
Overseas Swimmers

Different entry rules for swimmers from Leinster, Ulster, Connacht or Munster and Overseas Swimmers

 Join our Races

Leinster Open Sea have published a 2017 Calendar .

In order to compete in the Leinster Open Sea Races Swimmers must be:
•        be a registered member of a Swim Ireland swimming club (not special member);
•        Read the Rules and Swimmer’s Declaration;
•        Register with https://www.howdidyouswim.com/register3.php;
•        Have received a Race Number; and
•        Not wear a Wetsuit (save in the case of medical reasons).

Swimmers in the men’s or ladies’ races do not have to pre register except for the 5 big races:
•       The Island Race (Ireland’s Eye to Howth) Saturday 17th June;
•       87th Dún Laoghaire Harbour Race Sunday 13th August;
•       Wicklow 3k for RNLI Saturday 19th August;
•       Lough Dan Races Saturday 26th August;
•       Jones Engineering 98th Dublin City Liffey Swim Saturday 9th September.
Online entry forms can be found at FitLive .

The men’s and ladies’ race will:
•        count as qualifiers for the 87th Dún Laoghaire Harbour Race or the Jones Engineering 98th Dublin City Liffey Swim;
•        Receive points for swimmer of the year and club of the year;
•        Clubs will present prizes 1 to 6, team, Masters, Vets, Fastest time etc.;
•        Handicapped with the slowest swimmers starting first etc.

Swimmer under 18 year of year must also have a signed parental consent form:
Parental Consent Form

Leinster Open Sea and the host swimming clubs would like to remind all swimmers that we will:
•        close race registration ½ an hour before each respective race (Men’s, Ladies’ or Wetsuits);
•        enforce cut off times (usually 45 to 50 minutes).

For the latest updates, follow us on social media:

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For any other inquiries, use our contact form.

Happy Swimming

Leinster Open Sea