Favourites Papua New Guinea and Samoa ended the day (July 8) as the top ranked teams.
Fiji and Tonga are the other two nations vying for silverware, while Cook Islands, Tokelau and Solomon Islands dropped have out of medal contention.
Top seeds PNG, looking to defend their title from the Port Moresby 2015 Pacific Games, opened the day with a 10-0 win against Tonga in pool A.
Also in pool A, Fiji edged Samoa 14-12 in a tight contest early in the afternoon before the weather deteriorated.
In subsequent matches PNG beat Fiji 10-4 and Samoa beat Tonga 10-8.