Welcome to Mayport Naval Station, St Johns R, FL

Naval Station Mayport, a major U.S. Navy base, is located at the mouth of St. Johns River in Jacksonville, FL. The harbor it contains accomodates aircraft carrier-size vessels and has a paved runway at the military airfield.

Suggest an Edit

Boating in Mayport Naval Station, St Johns R, FL Map View

The wharves at Mayport are private and are used by fishing vessels. The Mayport Coast Guard Station is at the southerly end of the waterfront. There is a marina and a yacht basin with reported depths of about 10 feet. Gasoline, diesel fuel, water, ice, restrooms, charter boat hire, showers, electricity, wet and dry storage, and marine supplies are available. Hull, engine and electronic repairs can be made.
Navigation:
Click the “Map View” button above to see a chart of this location.
St. Johns River, the largest in eastern Florida, is about 248 miles long and is an unusual major river in that it flows from south to north over most of its length. It rises in the St. Johns Marshes near the Atlantic coast below latitude 28°00’N., flows in a northerly direction, and empties into the sea north of St. Johns River Light in latitude 30°24’N. The river is the approach to the city of Jacksonville and a number of towns near its shores.
St. Johns Light (30°23’10″N., 81°23’53″W.), 83 feet above the water, is shown from a white square tower on the beach about 1 mile south of St. Johns River north jetty. A tower at Jacksonville Beach and a red and white checkered water tank at Mayport Naval Station are prominent off the entrance, and water tanks are prominent along the beaches to the southward.
The Mayport Basin is on the south side of the St. Johns River just inside the entrance jetties and westward of St. Johns Point. A deep channel leads along the inshore end of the south jetty to the basin. It is marked by a 255√Ç° lighted range, lights, and lighted and unlighted buoys. Due to the relatively short distance between the lights of the range, sensitivity is poor. Mariners are advised to use the range with caution. Dangerous cross currents are reported to exist in the entrance to Mayport Basin; mariners are advised to enter at slack water or at a recommended speed of 13 knots. The waters of the turning basin are within a prohibited area of the U.S. Naval Station Reservation; commercial and pleasure vessels are prohibited from entering except in cases of extreme emergency.
Mayport is a town on the south bank of St. Johns River, 3 miles inside the entrance jetties. It has a ferry connection with the town of Fort George Island across the river.

Coastal Stories See All

Measuring a 'dead zone': Scientists retrieve the CTD (conductivity, temperature, depth) package of ocean sensors after profiling dissolved oxygen at a station during the Shelfwide Hypoxia Cruise in the Gulf of America. (Image credit: Courtesy of Cassandra Glaspie/LSU)

NOAA and Partners Find Smaller-than-Anticipated Hypoxic Zone in Gulf of America

8/25/2026

Coastal News

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA-supported scientists announced today that this year’s Gulf of America hypoxic zone is approximately 1,332 square miles, making it the 2nd smallest zone on record in 40 years of measurement. Hypoxic areas, also called “dead zones,” are areas with little to no oxygen in the water, which… SEE MORE

New Satellite Tag Offers Longer Tracking of Baleen Whales

8/24/2026

Ocean Science

By fisheries.noaa.gov, fisheries.noaa.gov. How do you track a 40-ton ocean giant without leaving a mark? Monitoring large whales is a delicate balancing act between science and safety. Satellite tags allow researchers to follow the movements of whales beyond where they can be seen. This helps us understand how whales overlap with human… SEE MORE

Technology Week: Launching into the Future with Advanced Technologies

8/21/2026

Ocean Science

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA scientists rely on cutting-edge technology to collect and analyze the data needed to manage our ocean resources and habitats. Because some ocean creatures live in remote areas and have complex life cycles, better understanding them requires unique tools. By leveraging advanced technologies, we gather critical data to… SEE MORE

Mayport Naval Station, St Johns R, FL

Welcome to Mayport Naval Station, St Johns R, FL

Monthly Tide Chart

Weather

Maps & Charts

Boating in Mayport Naval Station, St Johns R, FL Map View

In The Zone: The Sabre 51 Salon Express

Coastal Stories See All

NOAA and Partners Find Smaller-than-Anticipated Hypoxic Zone in Gulf of America

New Satellite Tag Offers Longer Tracking of Baleen Whales

Technology Week: Launching into the Future with Advanced Technologies

Photo Credits