Fort Matanzas sits on Rattlesnake Island in the middle of the Matanzas River.
Photo: NPS Photo
About
Fort Matanzas National Monument preserves the fortified coquina watchtower, completed in 1742, which defended the southern approach to the Spanish military settlement of St. Augustine. It also protects approximately 300 acres of Florida coastal environment containing dunes, marsh, maritime forest, and associated flora and fauna, including threatened and endangered species.
Activities
FishingSaltwater FishingLiving HistoryReenactmentsHistoric Weapons DemonstrationJunior Ranger ProgramMuseum Exhibits
Directions
Fort Matanzas is 14 miles south of Saint Augustine on State Route A1A.
Get directions →Weather
Summers are hot and humid with afternoon thundershowers. Sunscreen, a hat, UV protective sunglasses, and are recommended. Drink plenty of water. Winters are cool to mild with some cold spells, especially with wind from the north or off the water. Fall and spring are temperate with temperatures around 70F-80F (21C-26C). During danger of lightning, the fort will be closed and ferry service will be suspended. June-November is hurricane season so check for tropical storms before visiting.
News
Sep 28, 2026
Volunteer Fair at the Waterworks Offers Opportunities at Castillo de San Marcos
Castillo de San Marcos National Monument invites the public to attend a volunteer fair on Oct. 3 from 10 a.m. to 4 p.m. at The Waterworks, 184 San Marco Ave.
Sep 1, 2026
Castillo de San Marcos and Fort Matanzas National Monuments Welcome New Superintendent
The National Park Service has selected Angelita Alvino as the new superintendent of Castillo de San Marcos and Fort Matanzas National Monuments. Alvino has served as superintendent of the national parks of St. Croix for nearly five years and brings more than 25 years of NPS experience. She started her official role as superintendent on Aug. 23.
Entrance Fees
Timed Entry Reservation - Location$0.00