$ | Dive Bar | Waiting for first review

Castle Island in South Boston, MA

Castle Island is a dive bar at 10 Old Colony Avenue, South Boston, MA, 02127 in South Boston, MA. See reviews, photos, directions, check-ins, crowd notes, hours, and contact details from RankTheBar users.

Dive Bar

Founding reviewer action

Write your take. Become a founding local reviewer.

Early takes help shape the local guide before it is crowded. Save the bar, build a night-out list, send it to a friend, or claim the founding bar profile if you represent the venue.

Write your take Save this bar Build night-out list Send to a friend Claim founding profile

Directions Open in app

Address10 Old Colony Avenue, South Boston, MA, 02127

CitySouth Boston, MA

Websitecastleislandbeer.com

HoursMo 14:00-22:00; Tu-We 11:00-22:00; Th-Sa 11:00-00:00; Su 11:00-22:00

SourceOpenStreetMap / Overpass Boston, MA, verified 2026-04-29