Nuevo Vallarta fishing report May 2019. The fishing in Nuevo Vallarta is hot as a firecracker. Warm waters are moving in and all kinds of baits are following them. This large amount of bait brings in all kinds of fish the good eating red snapper the large California Bonita and the Spanish mackerel still hanging around right here in Nuevo Vallarta. When you see these pelagic fish moving you will see the large game Fish moving in right behind them. This is what’s happening in the month of May. The water is warmed up 77 degrees hanging around 78 degrees and we start seeing sailish, Marlin and mahi -mahi. These fish come in to feed on these large bait balls.