Castle Island - map and other informations


Castle Island is a popular recreational area located in South Boston, Massachusetts. This historic site offers visitors a unique blend of natural beauty, historical significance, and recreational activities. Whether you're looking to relax on the beach, explore military history, or enjoy a picnic with family and friends, Castle Island has something for everyone.


Originally known as Castle William, the island was first fortified in 1634 to protect the settlers from potential attacks. Over the years, it served various military purposes and played a significant role in defending Boston Harbor. Today, Castle Island is listed on the National Register of Historic Places and is managed by the Massachusetts Department of Conservation and Recreation.

Things to Do

Castle Island offers a wide range of activities for visitors of all ages:

Explore Fort Independence

The main attraction on Castle Island is Fort Independence, a pentagonal-shaped fort that dates back to 1851. Visitors can take self-guided tours of this well-preserved structure and learn about its fascinating history through informative signage.

Relax on Pleasure Bay Beach

Pleasure Bay Beach is a sandy stretch along the island's shoreline where visitors can soak up the sun or go for a refreshing swim during the summer months. The calm waters make it an ideal spot for families with young children.

Enjoy Scenic Walks

The perimeter of Castle Island features a paved walkway that offers stunning views of Boston Harbor and downtown skyline. Take a leisurely stroll or jog along this scenic path while enjoying the fresh sea breeze.

Picnic Areas and Playgrounds

If you're planning a family outing or gathering with friends, Castle Island provides ample picnic areas equipped with tables and grills. Additionally, there are playgrounds where children can have fun and burn off some energy.


Fishing enthusiasts will find Castle Island to be a great spot to cast their lines. The island offers fishing piers and jetties where you can try your luck at catching striped bass, flounder, or bluefish.

Visitor Information

Here are some important details to keep in mind when planning your visit to Castle Island:


Castle Island is located at 2010 William J Day Blvd, Boston, MA 02127.


There is a parking lot available near the entrance of Castle Island. However, it can get crowded during peak times, so arriving early is recommended. Parking fees may apply.


The island has public restrooms, food concessions, and a visitor center where you can learn more about its history and significance.


The main areas of Castle Island are wheelchair accessible, including the fort and the beach. There are also designated accessible parking spaces available.

Frequently Asked Questions (FAQ) about Castle Island

Is there an admission fee for Castle Island?

No, admission to Castle Island is free for all visitors.

Are dogs allowed on Castle Island?

Yes, dogs are allowed on Castle Island but must be kept on a leash at all times. Owners are responsible for cleaning up after their pets.

Can you swim at Castle Island?

Yes, you can swim at Pleasure Bay Beach on Castle Island. The beach is open during the summer months and is supervised by lifeguards.

Average weather in Castle Island

Temp max Temp min Rain Snow
Jan 3 °C -4 °C 57 mm 22 mm
Feb 4 °C -4 °C 51 mm 35 mm
Mar 7 °C -1 °C 59 mm 22 mm
Apr 13 °C 5 °C 95 mm 4 mm
May 19 °C 11 °C 74 mm 0 mm
Jun 23 °C 16 °C 93 mm 0 mm
Jul 27 °C 20 °C 93 mm 0 mm
Aug 27 °C 19 °C 63 mm 0 mm
Sep 23 °C 16 °C 79 mm 0 mm
Oct 17 °C 10 °C 113 mm 0 mm
Nov 10 °C 4 °C 80 mm 3 mm
Dec 6 °C 0 °C 102 mm 16 mm

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