The opening dates and times for "Water World" vary by location:

• WaterWorld Themed Waterpark in Ayia Napa, Cyprus opened for Summer 2025 on April 10th and is currently open.
• Water World park in Spain is open daily from 10 a.m. to 6 p.m. and will be open for the season from May 24 to September 21, 2025.
• WaterWorld in Bundoran is open weekdays from 10:15 a.m. to 5:15 p.m. and weekends the same hours.
• Waterworld Leisure Resort in the UK typically opens daily from 10:00 a.m. to about 5:30 p.m. or 6:00 p.m., with some variations.
• Water World in Denver, Colorado, is open daily from 10 a.m. to 6 p.m. as of August 2025.
• Water World Ocean Park in Hong Kong hours are typically 10:00 a.m. to 6:00 p.m.

If you have a specific Water World location in mind, please specify, and I can provide more precise opening information for that site.