It happened at a house in the Fairways estate at around 4:30am this morning.
He sustained a number of stab wounds and was taken to St Luke's Hospital.
Another male teenager was arrested at the scene in connection with the assault, and investigations are ongoing.
Outpouring Of Love And Tributes to Musician Glen Hansard
'A troubadour, a gracious man and a giant in the fight against homelessness' ... some of the tributes being paid to the musician who died in a crash in Dublin.
Wicklow Beaches To Host Kids Sea Safari Workshops In August
* Limited Spaces Remain *
Wildfire Battle Continues in France & Spain with Thousands of Holidays Cut Short
The most recent fires in the Wicklow Mountains are also the most significant of this summer, lasting over 10 days.
Wicklow Businesses Are Staying Competitive with Skills Training
Almost all businesses taking part in training were small and medium-sized enterprises.
Joy Unconfined As Wicklow Town's Shrine To Mayo Bears Fruit At Long Last!
May-O, May-O Maaaaayyyyyyyyyooooooo ....... ''Sam Maguire is coming home to Mayo'', and for one Rathdrum based homeowner, it's manna from heaven!
Light rain shower
High: 20°C | Low: 11°C
Sunny intervals
High: 20°C | Low: 11°C
Sunny intervals
High: 21°C | Low: 9°C
Light rain shower
High: 20°C | Low: 8°C
Light rain shower
High: 21°C | Low: 8°C
