This is a neighborhood-scale flea, not a stadium-sized swap meet. That means fewer booths, faster laps, and a higher chance you're buying something from the person who actually owned it. The May–August window keeps the crowds rotating — different vendors show up across the season, so a return trip in July isn't the same market you walked in June. Food situation depends on the date; bring cash for both goods and any nearby taquerias.
If you've got two hours, get there within the first 30 minutes of opening — the better finds move fast at a market this size — then walk west to the beach after.