What are some good Summer-y horror kinos?

Here are some I've watched so far (rated by fun, not quality):
Piranha 3-D >8.5/10
Piranha 3-DD >5/10
Nightmare Beach (1989) >6/10
Dagon >9/10
The Ruins >7/10
The Hills Have Eyes 2 (2007) - 7.5/10
Sleepaway Camp 1-3 >8/10
Friday the 13th 2-4 >9/10

Also looking for dumb shark movie kinos/hidden gems. Here are some decent-to-good ones I've seen lately:

47 Meters Down: Uncaged
Great White
Maneater
Bait 3D
Deep Blue Sea 1-3
Open Water 3
Shark Night

Not great, but dumb fun:
Blue Demon
Sky Sharks
Ghost Shark