Make plans to swim over to Neptune Island Waterpark every Monday in July from 10 am - 12 pm for Mermaid Mondays! Are you a 2025 Season Pass Holder? It gets better! 2025 Season Pass Holders will be admitted to Neptune Island 15 minutes early on Mermaid Mondays for an EXCLUSIVE Mermaid Monday Hour! See you on Monday, July 8, 15, 22 & 29 for Mermaid Mondays!