Castle Island

42.337034, -71.012081  
 William J. Day Blvd.
(617) 626-1250
(617) 727-5290 Fort Independence
Boston, MA
Suffolk County

Castle Island is located on William J. Day Blvd. in Boston, Massachusetts. Connected to City Point Beach and Pleasure Bay Beach, the 2.2 mile loop is perfect for running, strolling, relaxing, people watching, or taking in the view from one of the many benches throughout the park area. On the grounds you’ll also find plenty of grass, picnic tables, and historic Fort Independence, which is great for guided tours or self-guided exploration. The coarse pebbled beach area is small; walking to the water is gradual, and the waves are gentle to non-existent, great for kids. Castle Island provides a full day of activity for families as well as a historical element.

icon clock

Hours Of Operation

6am to 11pm

icon clock


Free and available on-site and along the streets

icon clock

Life Guard Schedule

On duty from Memorial Day to Labor Day

icon clock


Not allowed

icon clock


Castle Island is a carry in/carry out location with additional food available at Sullivan’s.

icon clock


Motels/hotels are within 5-10 minutes driving.

icon clock


Dogs are not allowed on the beach from May 1st through September 30th. Dogs must be on a leash or voice control.

icon clock

Picnic Area

Picnic tables are located throughout the park.

icon playground


A large playground is located on-site.

icon clock

Public Transportation

Please see the link below for times and other modes of public transportation.

icon clock

Restrooms / Showers

Restrooms are available on-site.

icon clock

Surfing/Kayaking/Paddle Boarding

Water sports are allowed during the off-season.

icon clock

Tide Information

Castle Island Tide Information 

icon clock

Walking Trails

Castle Island has its own trail system as well as a trail system with Pleasure Bay Beach and City Point Beach. Castle Island Trail Map
Additionally, Castle Island is part of the Boston Harborwalk; Boston Harborwalk is 38 miles of trails across waterfront and parks through Boston. Boston Harborwalk Information

icon water quailty

Water Quality

Water quality is monitored from Memorial Day to Labor Day. For more information please call (617) 626-1250. The accepted standard is 104 CFU/100mL in a single day or an average of 35 CFU/100mL over five days. The link below is the test results from 2003 to the current year. Castle Island Water Quality

icon clock

Water Temperature
(Click on “View more buoy data” to view water temperature.) 

icon comment

Beach Reviews

You may leave a review about this beach.

You must have a membership. Please login or create an account.

Go to top