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Welcome to UDI!
We are Boston's oldest dive shop, with over 50 years of experience in SDI and ERDI training, specializing in education, Public Safety equipment supply & servicing, and drysuit/wetsuit repair & tailoring!

Our Team
Learn more about our awesome staff and dive instructors!

Dive Sites
The best places to dive around Massachusetts!

Equipment
We've got the gear you need to dive comfortably in warm or cold water, available for rent or purchase!

Public Safety
We keep public safety and public works equipment up to date, do SCBA training and compressor servicing!
Contact Us!
617-666-0410
59 Washington St
Somerville MA 02144
Mon-Tue & Thu
10am - 2pm
Friday - 10 am - 4pm
Saturday 10 am - 4pm
(Closed on Wednesday and Sunday)
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