The evenness of the top sides through the 13 years to 16 years grand finals was highlighted with five of the eight Illawarra Coal-sponsored deciders won by five points or less.

Wests and Gerringong claimed two premierships, with Shellharbour, Warilla, Stingrays and Albion Park Oak Flats each winning one.

The Shellharbour 13 years Division 2 team were the biggest winners with a 28-6 victory over Culburra in the first grand final of the day.

The other seven grand finals were all close, with Warilla beating Collegians 28-20 in the 13-years Division 1 decider.

Stingrays are the 14 years Division 2 champions after defeating Wests 10-5.

Albion Park Oak Flats won the 14 years Division 1 premiership with a 14-10 victory over Wests.

Wests won the 15 years Division 1 title with a rugged 18-16 win over Stingrays.

It was even closer in the last grand final of the day, with Wests beating Kiama 29-28 in the 16 years Division 1 decider.

Gerringong celebrated victory in 15 years Division 2 with a 16-0 win over Berry, while a Ryan Cahill field goal for Gerringong was the difference in their 7-6 win over Shellharbour in the 16 years Division 2 decider.

The grand finals man of the matches were Mitchell Bronish (Shellharbour, 13 years Div 2); Samuel Hooper (Warilla, 13 years Div 1); Jacob Belo (Stingrays, 14 years Div 2); Cole Thompson (Albion Park Oak Flats, 14 years Div 1); Bailey Garrett (Gerringong, 15 years Div 2); Kain Holmes (Wests, 15 years Div 1); Toby Gumley-Quine (Gerringong, 16 years Div 2) and Callum Waldock (Wests, 16 years Div 1).

The premiership deciders for 13 years through to 16 years follows the Illawarra Junior League Mod Grand Final Day for 10 years to 12 years last month at Dapto Showground.

In Mod League, Wests won the 10 years and 12 years Division 1 premierships, while Helensburgh are champions in 10 years Division 2 and Port Kembla are the 11 years Division 2 premiers.

Thirroul won the 11 years Division 1 premiership, with Shellharbour champions in 12 years Division 2.