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Custer Institute

  • 1115 Main Bayview Ave.
  • Southold, NY 11971
  • (631) 745-2626
  • Visit Site

The Custer Institute and Observatory is Long Island's oldest public observatory (est.1927). Open to the public every Saturday evening from dusk until midnight, our staff of volunteers will give you a tour of the facilities and the night sky through our powerful telescopes. Custer has a library, museum, and gift shop. Frequent lectures, classes, concerts, art exhibits and other special events.


Things To Do

  • Science-Natural History: