Illawarra baseball's top clubs must overcome a three-week break heading into Saturday's semi-finals following a second straight washout last weekend.

The cancellation of the final two rounds left Dapto Chiefs as minor premiers and taking on reigning premiers Wests Cardinals in Saturday's major semi-final at Cringila Park.

Northern Pirates finished third and meet fourth-placed Berkeley Eagles in the minor semi-final at Dalton Park.

The preliminary finals in first, second and third grade on September 13 are set down for Hector Harvey Reserve.

In the minor league for fourth and fifth grade, this Sunday's major semi-finals are at Dalton Park, with the minor semi-finals at Cringila Park.

In fourth grade, Pirates face Warriors in the major semi, while Panthers take on Cardinals in the minor semi.

In fifth grade, it's Warriors v Pirates in the major semi and Cardinals v Panthers in the minor semi. In the second grade major semi, Cards take on Pirates, while Braves meet Chiefs in the minor semi.

In third grade, Pirates meet Cardinals in the major semi and Braves face Mariners in the elimination semi.

ILLAWARRA BASEBALL

Final ladder: Chiefs (13-3), Cardinals (11-6), Pirates (10-6), Eagles (6-8), Braves (4-11), Mariners (2-12).