Martin Murphy's side came back from a half time deficit to claim victory in Wexford.
Portarlington secured safe passage to the Leinster Club Senior Football quarter-finals following a dramatic win over Castletown of Wexford yesterday.
A goal by Paddy O'Sullivan five minutes into added time sealed victory for Port in Wexford, with a final scoreline of 1-11 to 0-10.
Rioghan Murphy also played a crucial part in the closing stages with a late point.
Pat O'Sullivan and John O'Loughlin were commentating on those late stages at Wexford Park:
Martin Muprhy's side will travel to Carlow's Palatine for a derby on Sunday week.
Keeping Up Unbeaten League Start The Aim For Athlone Town Women
Two Pointer Rule Makes Big Difference To Gaelic Football - Emmet McDonnell
Shane Lowry Records Opening Round Of 72
Tullamore Town FC Ready For Red Letter Weekend
Busy Bank Holiday Weekend In Store For Athlone Town
Big Weekend Ahead In Leinster Minor And U20 Hurling Championships
Leinster SFC: Opportunity Beckons For Westmeath
Westmeath Footballer Luke Loughlin Ruled Out For Remainder Of Season
Laois And Westmeath Battle For Place In Leinster LGFA Decider
Alex Dunne Set For Action In Miami This Weekend
Fundraising Walk Planned For Westmeath Man Left Paralysed In Freak Accident
Shane Lowry In Action In Miami This Week
Westmeath Secure Leinster Minor Football Quarter Final
CCFL: Two Draws In Senior Division
Potential Hometown Fight On The Cards For Joe Ward
Ava O'Connor Breaks Personal Steeplechase Record
Laois Fixture In Two Weeks A "Massive Game" - Kevin O'Brien
Camross Camogie Honoured In Laois Following Historic All-Ireland Triumph
Athlone Town Secure Vital Win In Women's Premier Division
Laois And Westmeath To Clash In Leinster Camogie Decider