Planning Neptune Island Waterpark in Hartsville? This updated 2026 guide covers real admission prices, season dates, opening hours, discounts, free parking, lockers, cabanas, Castaway Bay Wave Pool, the quarter-mile Endless Abyss Lazy River, Neptune’s Revenge, Twin Sirens, Trident Racers, Piratesville, slide height requirements, food rules, re-entry, life jackets, groups, weather planning and the exact park location.
- Under 48″: $21.99
- Senior 55+: $21.99
- Military / first responder: $21.99
- Parking: free
- Lockers: $8–$12
Build Your Neptune Island Plan
Choose your group, height mix and main priority to get a more useful starting plan than simply walking to the first attraction you see.
What Is Neptune Island Waterpark?
Neptune Island is a family-oriented municipal waterpark in Hartsville, South Carolina. The City of Hartsville owns and operates the park, which opened in 2018 and combines a wave pool, quarter-mile lazy river, children’s splash area, speed slide, tube slides and multi-lane mat racers.
Castaway Bay
The park’s wave pool gives families a larger open-water attraction without requiring the height minimum used by the main slide tower.
Endless Abyss
Neptune Island’s lazy river is approximately one-quarter mile long, making it a useful reset between higher-energy attractions.
Piratesville
A 5,100-square-foot children’s splash zone with water jets, cannons, buckets and slides for smaller guests.
Neptune Island Waterpark Ticket Prices 2026
Neptune Island primarily separates general admission by height, while also offering reduced rates for seniors, military members, first responders and qualifying special-needs guests.
| 2026 Admission Category | Listed Base Price | Important Detail |
|---|---|---|
| Over 48 inches | $24.99 | Main general-admission category. |
| Under 48 inches | $21.99 | Lower price reflects attraction restrictions for smaller riders. |
| Senior age 55+ | $21.99 | Reduced senior admission. |
| Military & First Responders | $21.99 | Valid military identification or qualifying badge is required. |
| Handicap / Special Needs | $21.99 | Official ticket page lists this reduced category. |
| Children age 2 & under | $0 listed* | See the important toddler admission note below. |
Does Neptune Island Have a Spectator Ticket?
No. Neptune Island says everyone entering the waterpark needs regular admission. There is no discounted non-swimmer or spectator category.
Are Tickets Refundable?
No. The official policy says tickets and other purchases are non-refundable. Tickets sold for the 2026 season expired September 7, 2026, with no extensions.
If you are comparing Neptune Island’s public day-ticket pricing with a larger regional park, our H2OBX Waterpark ticket and map guide explains current admission, parking, cabanas and family costs for the Outer Banks waterpark in North Carolina.
Neptune Island Family Admission Calculator
Estimate the published 2026 base admission cost for your group. Applicable state and municipal fees, food, lockers and cabanas are deliberately kept separate instead of being guessed.
Neptune Island Waterpark Hours 2026
Neptune Island did not use one fixed seven-day schedule for the entire season. It opened for selected late-May dates, operated daily through most of June and July, then changed to weekends only beginning August 1.
| 2026 Period | Published Schedule | Planning Note |
|---|---|---|
| May 16 | 10 AM–7 PM | Season-pass-holder-only opening day. |
| May 17 | 12 PM–6 PM | General admission opening day. |
| May 23 | 10 AM–7 PM | Saturday operation. |
| May 24 | 12 PM–6 PM | Sunday operation. |
| May 25 | 10 AM–7 PM | Memorial Day. |
| May 30 | 10 AM–7 PM | Saturday. |
| May 31 | 12 PM–6 PM | Sunday. |
| June 1–July 29 |
Mon–Sat: 10 AM–7 PM Sunday: 12 PM–6 PM |
Main seven-day summer operating period. |
| Beginning August 1 |
Saturday: 10 AM–7 PM Sunday: 12 PM–6 PM |
Weekend-only late-summer operation. |
| September 7 | 10 AM–7 PM | Labor Day Luau and final day of the 2026 season. |
Neptune Island Discounts & Special Deals in 2026
Neptune Island ran several genuine 2026 promotions. Because those dates have passed, they are shown here as historical 2026 offers, not active coupons.
Twilight Tuesdays
Tuesday admission was offered for $15.99 per person from 3 PM–7 PM during the promotion period from June 2 through July 28.
Splashin’ Grades
During June, qualifying students who earned top report-card marks could receive one free admission under the park’s Splashin’ Grades program.
Father’s Day
On June 21, dads received free admission with the purchase of a qualifying full-price general admission ticket.
Military / First Responder
Eligible military personnel and first responders had a listed 2026 admission rate of $21.99 with qualifying ID.
Group Deal Days
Monday–Thursday groups of at least 15 could qualify for $12.99 per-person admission with the required advance reservation and deposit.
Season-Pass Savings
Season passes bundled repeat admission, three Bring-a-Friend tickets, early entry, cabana savings, locker savings and food discounts.
Neptune Island Waterpark Rides & Attractions
Neptune Island has a stronger attraction mix than its municipal waterpark size might suggest: a wave pool, long lazy river, children’s splash complex, speed slide, two tube slides and multi-lane racing slides.
Piratesville Splash Pad
Under 48″ slide rule Young childrenApproximately 5,100 square feet of water jets, water cannons, dumping buckets and child-focused slides.
Castaway Bay Wave Pool
Wave poolFamily wave-pool attraction designed for body surfing and wave play.
Endless Abyss Lazy River
¼ mile RelaxingA quarter-mile lazy river running through the center of Neptune Island.
Neptune’s Revenge
48″ minimum Speed slideThree-story body speed slide promoted by the park as reaching speeds of approximately 30 mph.
Twin Sirens
Tube slidesTwo twisting tube-slide routes give families a pair of slide experiences from the attraction tower.
Trident Racers
42″ minimum Mat racerMulti-lane racing attraction using mats and vertical humps for head-to-head competition.
Families comparing Neptune Island with a larger East Coast slide-and-wave-pool park can also review our Ocean Breeze Waterpark 2026 guide for a different Virginia Beach attraction mix and ticket structure.
Neptune Island Slide Height Checker
Enter a rider’s height to see which headline attraction categories are worth checking first. Final eligibility always depends on the posted ride sign and lifeguard instructions.
Check Neptune’s Revenge, Twin Sirens and Trident Racers. Piratesville slides are designed for guests under 48 inches.
Neptune Island With Toddlers & Smaller Children
Piratesville Is the Key Area
Families with smaller children should build the day around Piratesville rather than promising the large attraction tower. Its slides are specifically limited to riders under 48 inches.
Stay Within Arm’s Reach
Neptune Island’s safety rules say children and non-swimmers must remain supervised and within arm’s reach of their guardian. Lifeguards are present, but parents remain responsible for supervision.
Life Jackets
- Complimentary life jackets are available throughout the park on a first-come, first-served basis.
- Guests can bring their own U.S. Coast Guard-approved life jacket.
- Children’s water wings are not allowed.
- Personal noodles and outside tubes are not allowed.
- Other personal flotation devices are restricted.
Swim Diapers
Swim diapers are required for tots. Because the official ticket page and FAQ use slightly different language about age-2-and-under admission, confirm the current reusable swim-diaper requirement before your visit.
If your family prefers another public family waterpark with clear height-based pricing and extensive child-supervision guidance, our Great Waves Waterpark family-planning guide provides a useful comparison.
Neptune Island Season Pass Prices 2026
Per individual before applicable fees.
Available in person with qualifying proof of residence inside Hartsville city limits.
2026 Pass Benefits
Admission throughout the eligible 2026 operating season.
Three single-use guest tickets were attached to each pass.
15-minute early entry on Saturdays, Sundays and listed holidays.
Season-pass-holder cabana discount redeemed in person.
Pass perks included reduced locker rental.
Current pass terms listed 10% off qualifying food and beverage purchases, excluding Neptune’s Patio.
Neptune Island Locker Prices
Daily standard locker.
Useful for multiple guests sharing valuables.
Family-sized daily locker.
Neptune Island Cabana Prices 2026
Neptune Island offers several cabana levels. Admission is not included, so calculate cabana cost on top of every guest’s park ticket or season pass.
| Cabana | Maximum Capacity | Mon–Thu | Fri–Sun | Useful Feature |
|---|---|---|---|---|
| Shipwreck Island | 6 guests | $110.99 + tax | $135.99 + tax | Fan, refrigerator, water bottles, seating, locker and Wi-Fi. |
| Volcano Bay | 8 guests | $125.99 + tax | $155.99 + tax | Upgraded seating, drinks, refrigerator and secluded park view. |
| Pirates Cove | 8 guests | $130.99 + tax | $160.99 + tax | Positioned with a view toward Piratesville Splash Pad. |
| Castaway | 10 guests | $135.99 + tax | $165.99 + tax | View toward Castaway Bay with easy access to the slide tower and lazy river. |
Food, Water, Coolers & Re-Entry
Neptune Island generally prohibits outside food and beverages inside the waterpark, but its FAQ describes a narrow water/cooler exception.
Inside the Park
- General outside meals and snacks are prohibited.
- Glass is prohibited.
- Grilling is not allowed on City of Hartsville property.
- All bags are subject to inspection.
Small Water Cooler Rule
- Soft insulated tote only.
- Maximum approximately 8″ × 10″ × 8″.
- Up to two factory-sealed bottles of plain water.
- Ice packs allowed; loose ice is not.
Can You Eat Outside and Come Back?
Yes. Neptune Island has picnic tables outside the waterpark in the parking-lot area. If you leave to eat, get your hand stamped before exiting so you can re-enter during the same operating day.
Swimwear, Water Shoes & Important Rules
👙 Proper Swimwear
Clothing with rivets, zippers or buckles is not suitable for water attractions.
👕 T-Shirts
T-shirts are permitted on most attractions but not on the speed slide. A skin-tight rash guard may be used under the park’s speed-slide rule.
🩴 Water Shoes
Water shoes are allowed in Castaway Bay, Endless Abyss and Piratesville but are not allowed on other attractions.
🚫 No Personal Speakers
Neptune Island plays its own family-friendly park audio and prohibits personal speakers.
🚫 No Wagons
Wagons are prohibited, while strollers needed for young children are permitted.
🚭 Smoke-Free Property
Neptune Island, surrounding Byerly Park and parking areas are smoke- and tobacco-free.
Neptune Island Group Rates 2026
Groups of at least 15 could receive discounted admission when the reservation was made at least 72 hours in advance with the required 30% deposit.
| Group | 2026 Rate | Requirement |
|---|---|---|
| Mon–Thu, 15+ guests | $12.99 each | 72-hour advance booking + 30% deposit. |
| Fri–Sun, 15–24 | $16.99 each | Advance reservation required. |
| Fri–Sun, 25–49 | $15.99 each | Advance reservation required. |
| Fri–Sun, 50–99 | $14.99 each | Advance reservation required. |
| Fri–Sun, 100–199 | $13.99 each | Advance reservation required. |
| Fri–Sun, 200+ | $12.99 each | Advance reservation required. |
Neptune Island Weather & Closure Policy
Neptune Island is entirely outdoors, so thunderstorms, unsafe conditions and temperature can affect the day’s operation.
Weather Decisions
On questionable weather days, the park says closure decisions are typically made by approximately 9 AM.
Check Before Driving
Review the official website or social channels, or call 843-951-9400.
No General Refund Promise
Neptune Island’s published purchase policy states tickets and online items are non-refundable.
Neptune Island Waterpark Map, Parking & Directions
Free Parking & Overflow Parking
Neptune Island has a main parking lot directly outside the entrance. On particularly busy days, additional parking may be available in nearby areas of the adjacent Byerly Park Recreational Complex.
From Interstate 20
- Take Exit 116.
- Travel northeast on US-15 North toward Hartsville.
- Continue toward SC-151 North.
- Turn onto 14th Street.
- Neptune Island will be on the right.
From Interstate 95
- Take Exit 164 toward US-52 West / Darlington.
- Continue toward SC-34 West / SC-151.
- Follow SC-151 North toward Hartsville.
- Turn right onto 14th Street.
- Continue approximately half a mile to Neptune Island.
Before driving, you can also review the official Neptune Island park map and directions .
Visitors turning a Hartsville waterpark trip into a South Carolina beach vacation may also find our Crown Reef Myrtle Beach waterpark and resort guide useful for comparing a day-trip municipal waterpark with an oceanfront resort-waterpark stay.
Best Neptune Island First-Hour Plan
Neptune Island is manageable without an aggressive itinerary, but a good first hour prevents mixed-age families from wasting time walking between attractions.
What to Bring to Neptune Island
Pack
- Ticket confirmation or season pass.
- Photo ID for applicable discounts.
- Proper swimsuit.
- Swim diaper for tots.
- Towels.
- Sunscreen.
- Dry clothes.
- Waterproof phone pouch.
- Approved life jacket if preferred.
- Payment method.
- Up to two qualifying sealed water bottles under the cooler rule.
Do Not Plan to Bring
- Full picnic cooler inside.
- Glass containers.
- Personal tubes.
- Water wings.
- Pool noodles.
- Wagon.
- Personal speaker.
- Selfie stick.
- Drone.
- Clothing with exposed slide-damaging hardware.
8 Neptune Island Mistakes to Avoid
42 inches and 48 inches change which slides a child can use.
Everyone entering needs qualifying admission.
The outside-food policy is restrictive.
You need it when leaving for same-day re-entry.
Outside tubes, noodles and water wings are prohibited.
Add $8–$12 if you need secure storage.
Every cabana guest still needs park admission.
Outdoor operations can change before you arrive.
Neptune Island vs a Larger Destination Waterpark
Neptune Island makes the most sense when you want a manageable family day in Hartsville with free parking, a long lazy river, wave pool and enough slides for several age groups without turning the trip into a full resort vacation.
If your family is deciding between a compact city-operated park and a larger vacation-oriented waterpark with more major slides, our Ocean Breeze Waterpark planning guide is a useful comparison for attraction depth, day-ticket planning and family logistics.
Neptune Island Waterpark FAQ 2026
How much were Neptune Island Waterpark tickets in 2026?
The official 2026 ticket page listed general admission at $24.99 for guests over 48 inches and $21.99 for guests under 48 inches. Seniors age 55+, military/first responders and qualifying handicap/special-needs guests were also listed at $21.99 before applicable fees.
Where is Neptune Island Waterpark located?
Neptune Island Waterpark is located at 1109 14th Street, Hartsville, South Carolina 29550.
Is parking free at Neptune Island?
Yes. Neptune Island states that parking is free. Overflow parking may be available in nearby sections of the adjacent Byerly Park Recreational Complex on particularly busy days.
What are Neptune Island’s main height requirements?
Piratesville slides are for guests under 48 inches. Neptune’s Revenge requires at least 48 inches. Trident Racers requires at least 42 inches. Twin Sirens has a 42-inch threshold with an additional life-jacket condition for smaller eligible riders; follow the posted on-site rule.
Does Neptune Island have a lazy river?
Yes. Endless Abyss is Neptune Island’s approximately quarter-mile lazy river. Park tubes are available for use and free swimming is permitted under the attraction’s current rules.
Does Neptune Island have a wave pool?
Yes. Castaway Bay is the park’s wave pool. Personal tubes are not permitted in the wave pool, and life jackets are available.
Can I bring outside food into Neptune Island?
General outside food and beverages are prohibited. The FAQ allows a small soft insulated tote under the specified size limit with limited factory-sealed plain water and ice packs. Families can also eat at picnic tables outside the gate and return with a hand stamp.
How much were Neptune Island lockers in 2026?
Daily locker prices were listed at $8 for small, $10 for medium and $12 for large.
How much was a Neptune Island season pass in 2026?
The general season pass was $76.99 and the qualifying Hartsville in-city resident pass was $64.99. Each pass was for one individual; there was no family pass.
When did Neptune Island Waterpark close for the 2026 season?
The official event calendar identified Monday, September 7, 2026, as the Labor Day Luau and the final operating day of the 2026 season.
Official Information Checked
Ticket prices, attraction names, height requirements, parking, operating dates, season passes, cabanas, group rates and visitor rules were checked against Neptune Island’s own current pages.
Independent visitor guide: USWaterParkGuide.org is not Neptune Island Waterpark or the City of Hartsville. Ticket prices, applicable taxes/fees, opening dates, attraction rules, cabana rates, discounts, food policies, operating hours and weather closures can change. Always verify current information directly with Neptune Island before buying tickets or making a long drive.