The final between the county’s two top-ranked teams will be a repeat of the 2012-13 final when Ipswich won 6-1.
Lowestoft, who like Ipswich play in the FA Women’s Premier League South East Division One, beat Bacton United Women 4-0 in their semi-final at Woodbridge Town FC.
Hannah Waters scored twice while Charnelle Riggall and Broghan Scully were also on target as Lowestoft eased past their opponents who play three leagues lower in the Suffolk Girls’ & Women’s League.
Some of the Lowestoft players then made their way across to Whitton United FC, where Ipswich Town kicked off their last-four match against Ipswich Wanderers Women two hours later.
Ipswich, who play two leagues higher than Wanderers of East Region Women’s League Division One, did not have things all their own way before running out 2-0 winners.
The holders reached their sixth final in the last seven seasons courtesy of a goal in each half from Hollie Clement and Roxanne Small.
The date and venue of the final will be announced in due course.
Updated 19:52 - 21 Feb 2017 by Terry Bullen