Upcoming Events

Sensory Saturdays, 3-29-25

Mar 29, 2025 10:00AM—11:30AM

Spring Break Camp 2025

Apr 14, 2025 9:00AM—Apr 16, 2025 12:00PM

Maker Faire Long Island, June 7th, 2025

Jun 07, 2025 10:00AM—5:00PM

Port Jefferson Harborfront

STEM Scouts: Girl Scout Badge Quest -March 27th – Robo-Rangers

Mar 27, 2025 5:00PM—6:30PM

Long Island Explorium 101 East Broadway Port Jefferson, NY 11777

Open Play Hours – March 29th thr 30th

Mar 29, 2025 1:00PM—Mar 30, 2025 5:00PM

Long Island Explorium Port Jeff Harbor 101 East Broadway Port Jefferson, NY 11777

First Mondays: Homeschool Families Exclusive at the LI Explorium 4-7-25

Apr 07, 2025 10:00AM—12:00PM

STEM Scouts: Girl Scout Badge Quest – April 24th – Outdoor Innovators

Apr 24, 2025 5:00PM—6:30PM

Long Island Explorium 101 East Broadway Port Jefferson, NY 11777

Our current General Hours are:

Saturday and Sunday: 1 PM – 5 PM
School Year Hours in effect starting September 2nd, 2024

Additional hours during special events, school breaks, and holidays as noted. See our Calendar of Events page for upcoming events

Stay informed by signing up for our newsletter and following us on social media.

For more details, including a virtual tour, map, and additional information, visit our Visit Us Page.

Monday through Friday:
Closed
Saturday:
1:00 PM - 5:00 PM
Sunday:
1:00 PM - 5:00 PM

In addition to our regular hours, we will be OPEN:

  • Martin Luther King Jr Day: Monday, 1/20/25.
  • Lunar New Year: Wednesday, 1/29/25.
  • February Break: Monday, 2/17/25 through Friday, 2/21/25.
  • Spring Break: Monday, 4/14/25 through Friday, 4/18/25.
  • Memorial Day: Monday, 5/26/25.
  • Juneteenth: Thursday, 6/19/25.

Closed Christmas Eve & Christmas Day

Additional dates to be added