Welcome to the Custer Institute & Observatory

Long Island's oldest public observatory (est. 1927)

For the Curious

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.

Custer Links

Saturday Night Observing: Open 7pm-Midnight

Contact a human: Call, E-mail, and Visit

As an all-volunteer organization, we can only guarantee to check phone messages when we are there Saturday nights.

The Custer Observatory's phone number is:

We are located at
1115 Main Bayview Road
Southold, New York 11971
See the map below

Our mailing address is:
PO Box 1204
Southold, New York 11971

Chuck Cardona, President:
David van Popering, Vice President:
Barbara Lebkeucher, Treasurer:
Matt Campbell, Finance Chair:

Alan Cousins:
Bart Fried:
Justine Haupt:

In the map below, enter where you are coming from and find out how to get here!

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