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.
Wicklow Households Encouraged To Explore Grants To Lower Energy Bills
New Equipment To Support Disabled Water Sports Users In Accessibility Boost For Bray Harbour
Dominant Daina Moorehouse Into World Cup Last 16 After Opening Brazilian Bout
Greystones E-Bike Scheme Flourishing With Over 12,000 Recorded Trips
Tinahely Scoops Best Actress Award on All Ireland Stage