Swimming & water parks
$20median per child
18 published prices · United States
$0$60
Middle half: $5.25–$42.24 per child
0 local prices; at least 5 are needed. So this shows the nationwide range.
Swimming & water parks
Birthday score3.5/5
How we rateThunder Lagoon Waterpark in Fenwick Island has custom birthday and group packages, with bookings handled by phone. The waterpark is closed for the 2026 season and reopens in summer 2027, so plan your inquiry around that reopening. Have your preferred date and guest count ready when you call. Ask for a package quote and confirm what is included before inviting the group.
How does the price compare?
Swimming & water parks: price range from published packages.
Prices from venues in Seaford DE.
This venue: Ask the venue for a price
No reliably comparable price per child. The bar shows the other venues only, not a price for this one.
Middle half (p25–p75)Median
Starting prices per child; party prices are only divided when the package states how many kids it includes. Minimum spends and unclear prices are left out. Prices in the directory are not live offers. The venue's current price applies.
- Address
- Route 1, Fenwick Island, DE 19944
- Phone
- (302) 539-4027
Party packages
Custom birthday and group package
Book by phone. Waterpark closed for the 2026 season; reopens summer 2027.
Our take
3.5/5Thunder Lagoon Waterpark's custom birthday and group package gives families a way to discuss a celebration around a waterpark visit in Fenwick Island. The custom format is appealing when you want to talk through your group's plans before committing. It suits a birthday child who wants waterpark time at the center of the day.
Timing is decisive: the waterpark is closed for the 2026 season and is scheduled to reopen in summer 2027. Treat this as an option for a future summer celebration. Packages are booked by phone, so confirm the reopening schedule and agree on the details before inviting guests.
Questions to ask Thunder Lagoon Waterpark before booking
These eight points decide whether a party works out and what it really costs. It is easiest to go through them in one phone call.
- How many children fit per party, and when does the price go up?
- Is the room private to our group or shared with other guests?
- How long is the package, and when does the clock start?
- Is a host or activity leader included, or do the parents supervise?
- Can we bring our own cake, drinks or food?
- What costs extra: decorations, food, socks, additional adults?
- Until when can we cancel or reschedule for free?
- Is there space for gifts, coats and the parents' waiting time?
FAQ
Can I book a waterpark party for the rest of 2026?
The waterpark is closed for the 2026 season. Its next season begins in summer 2027.
Is there a fixed birthday package to choose?
The birthday and group package is customized. Call with your party details to discuss the arrangements.
More places in Fenwick Island
Prices, hours and packages last checked on Oct 21, 2026. Information is provided without guarantee. Please confirm details with the venue before booking.
Is something wrong or out of date? Report a correction.