The wash-out of Saturday's second day of round 13 meant Oak Flats slipped from third to fourth and behind the Kookas, who took the 14 first-innings points on the opening day against Gerringong-Jamberoo.

Albion Park had been left to chase an improbable 413 for victory against Oak Flats.

However, the wash-out gave the Park seven points for the draw and should seal their semi-final berth.

Lake Illawarra had already clinched first-innings points on day one against The Rail and, although they missed out on an outright victory, the Lakers are the new competition leaders.

"Our focus is to finish top two, which is hugely important if we get rain in the semis," Lakers skipper Shane Cody said.

"Albion Park beat us earlier in the season, so that's in our minds and we want to get one back on them."

Oak Flats have lost just once all season, but are now fourth after rain denied the Rats an outright win against The Rail in round 12.

The wash-out almost certainly cost them first-innings points against the Park.

The top four teams will face one another in a dream final round beginning on Saturday.

Oak Flats are away to Kookas, with the winner to seal a top-four spot, but the loser will miss out if fifth-placed Shellharbour beat Gerringong-Jamberoo or have a strong bonus points first-innings win.

Shellharbour's fighting draw against the Lakers in round 12 could prove crucial to their finals chances, which now rest on a big away victory over the struggling Jets.

Shellharbour head into the last round 12 points behind Oak Flats and, if they beat the Jets, and Oak Flats are defeated by the Kookas, then Shellharbour and Oak Flats would be tied.

This would set up a scramble for second-innings bonus points or an outright result.