Short answer: During World War II Sebastian Inlet was closed, coastal lights were banned for fear of U-boats, citizen spotters manned towers, and the Navy used the inlet site to train demolition squads. Surplus Navy explosives reopened the inlet for good in 1948. Postwar Sebastian had fewer than 400 residents until General Development began its 15,000-lot street grid in the late 1950s.
Last verified: October 11, 2026, against the sources listed at the end of this page.
What happened in Sebastian during World War II?
During World War II Sebastian lived under coastal blackout rules, its inlet stayed closed, and citizen spotters watched the shore from towers for German submarines.
The war reached the lagoon before Pearl Harbor did. A strong nor'easter closed Sebastian Inlet in 1941, and the Sebastian Inlet District history says the inlet then remained closed through most of the war for safety reasons. The same account records that lights of any kind were illegal along the coast because of the U-boat threat, and that towers were built along the shore and manned by citizen spotters.
Movement across the lagoon was watched as well. The state historical marker at the Wabasso bridge on County Road 510, south of Sebastian, says that during World War II the bridge to Orchid Island was limited to people who lived on the island, and the bridge tender checked the credentials of anyone crossing (A.B. Michael (Wabasso) Bridge marker).
The war years also mark a turning point for Pelican Island, the refuge in the lagoon off Sebastian. The U.S. Fish and Wildlife Service says the island measured 5.5 acres in 1903 and began to shrink around 1943, eroded by natural and human-caused wave action, a loss that later drove a 2001 shoreline project.
How did the Navy use the Sebastian area in the war?
The Navy turned the closed Sebastian Inlet into an amphibious training ground for demolition squads late in the war, while Naval Air Station Vero Beach, south of Sebastian, trained aviators from 1942 to 1945.
The Sebastian Inlet District history states that during late World War II the inlet site was turned over to the U.S. Navy as an amphibious training ground for its demolition squads.
The bigger installation was at the Vero Beach airport. The state marker there says Naval Air Station Vero Beach was commissioned on November 24, 1942, to train more than 2,700 men plus 300 WAVES and women Marines, and that the city airport grew from 100 acres to 2,500 acres (U.S. Naval Station, Vero Beach marker). Its mission moved from dive bombers to daytime pilots and finally to night fighters.
The cost was real. The marker records more than 100 lives lost in flight training accidents and 237,102 hours of flight time logged between the first flight in December 1942 and September 2, 1945. The station was placed in caretaker status in June 1946 and deeded back to Vero Beach, ending the wartime military presence in north Indian River County.
How did the end of the war reopen Sebastian Inlet?
Sebastian Inlet was blasted open for good in 1948 using surplus Navy explosives left behind after the war, and it has stayed open since.
After several short-lived openings, work resumed in 1947, and in 1948 Sebastian Inlet District commissioners Roy O. Couch, Harry C. Goode Sr., Jake Brannin and others used leftover Navy demolitions to open the channel, according to the district's history. Through the 1950s the district dredged to deepen and widen the channel and extended both jetties.
The reopening came only a few years after the Sebastian Inlet District's 1939 dredging project, which had removed an estimated 61,000 cubic yards of sand for $6,000 before the 1941 storm sealed the channel again. The full story of the cut, from the 1872 attempt to the 1948 blast, is told on this site's Cutting Sebastian Inlet page; here the point is that the war first shut the inlet and then supplied the means to reopen it.
What was Sebastian like in the late 1940s and 1950s?
Postwar Sebastian was a fishing town of fewer than 400 people, with no high school and a short Main Street at U.S. 1.
Vero Beach Magazine reported in July 2024, drawing on residents who grew up in Sebastian some 70-plus years earlier, that the community then numbered fewer than 400 people. A family that arrived in 1950 recalled that there was no high school in Sebastian, so teenagers were bused to Vero Beach High School. Commercial fishing families netted mostly mullet and packed it on ice for trucks bound for New York.
Downtown was small. The magazine describes a grocery store and a hardware store sharing the building at the corner of Main Street and U.S. 1, a small post office and a drugstore; for anything else, residents drove to Vero Beach or Melbourne. Children fished or played softball on the grammar school ball field. The 1927 Sebastian school building at 1235 Main Street now houses the Sebastian Area Historical Museum.
Much of that town survives on the map. The National Park Service lists the Old Town Sebastian Historic District East, around Main and Washington streets, the riverfront drive and the FEC railroad, with periods of significance that include 1925 to 1949 and 1950 to 1974 (NPGallery, NRIS 03000728).
Which postwar changes set up modern Sebastian?
Three postwar developments reshaped Sebastian: General Development Corporation's late-1950s street grid, the push to expand Pelican Island refuge, and the 1960s rediscovery of the 1715 Fleet.
The City of Sebastian says that in the late 1950s General Development Corporation designed and built the street and drainage system for about 15,000 single-family home sites, most of which were developed by the late 1990s. Vero Beach Magazine adds that General Development platted some 1,345 acres in what is now the Sebastian Highlands and advertised $500 quarter-acre lots across the Northeast, and that growth stayed slow until the 1970s; today Sebastian is the most populous municipality in Indian River County.
Conservation grew alongside the lots. The U.S. Fish and Wildlife Service credits Joe Michael, an Orchid Island citrus grower, with forming the Indian River Area Preservation League in 1959 and leading a nine-year campaign that expanded Pelican Island refuge from a few islands to more than 5,400 acres. The refuge was named a National Historic Landmark in 1963.
Offshore, the 1715 treasure fleet came back into view. The 1715 Fleet Society says the modern age of treasure hunting began in 1960 with the Real Eight group, whose first site, the Cabin Wreck, lies about two miles south of Sebastian Inlet.
The barrier island opened up last. The bridge carrying A1A over Sebastian Inlet opened on February 27, 1965, and in return for helping finish the bridge and pave A1A, Brevard County ceded almost 3 miles of land south of the inlet to Indian River County, the Sebastian Inlet District records. The state then bought the land around the inlet, and Sebastian Inlet State Park was established in 1971.
| Year | Event |
|---|---|
| 1941 | Nor'easter closes Sebastian Inlet; it stays closed through most of the war |
| 1942 | Naval Air Station Vero Beach commissioned, November 24 |
| About 1943 | Pelican Island (5.5 acres in 1903) begins to erode |
| Late WWII | Navy uses the inlet site for demolition squad training |
| 1946 | Vero Beach air station placed in caretaker status, June |
| 1948 | Inlet blasted open with surplus Navy demolitions |
| Late 1950s | General Development lays out about 15,000 home sites |
| 1959 | Indian River Area Preservation League formed |
| 1960 | Real Eight begins modern 1715 Fleet salvage |
| 1963 | Pelican Island refuge named a National Historic Landmark |
| 1965 | Sebastian Inlet bridge opens on A1A, February 27 |
| 1971 | Sebastian Inlet State Park established |
Frequently asked questions
Was Sebastian Inlet open during World War II?
No. A strong nor'easter closed the inlet in 1941, and the Sebastian Inlet District says it stayed closed through most of the war for safety reasons. Late in the war the Navy used the site for demolition training, and it was blasted open again in 1948.
Was there a military base near Sebastian in World War II?
The nearest base was Naval Air Station Vero Beach, commissioned November 24, 1942 at the Vero Beach airport. It trained Navy and Marine aviators, logged 237,102 flight hours by September 2, 1945, and went to caretaker status in June 1946.
How many people lived in Sebastian after the war?
Fewer than 400, according to residents interviewed by Vero Beach Magazine in 2024 about the community some 70 years earlier. Sebastian had no high school then, so teenagers rode buses to Vero Beach High School.
When did the Sebastian Inlet bridge open?
The bridge carrying State Road A1A over Sebastian Inlet opened on February 27, 1965, connecting Brevard and Indian River counties, according to the Sebastian Inlet District. Sebastian Inlet State Park followed in 1971.
When did the Sebastian Highlands street grid begin?
The City of Sebastian says General Development Corporation designed and built the street and drainage system for about 15,000 single-family home sites in the late 1950s, and most of those sites were built on by the late 1990s.
Sources
- Sebastian Inlet District: The History of Sebastian Inlet https://www.sitd.us/the-history-of-sebastian-inlet Used for: WWII inlet closure, spotters, Navy training, 1948 reopening, 1965 bridge, 1971 park
- Florida Historical Marker: U.S. Naval Station, Vero Beach, World War II (2000) https://markers.flheritage.com/home/details/717 Used for: NAS Vero Beach dates and figures
- Florida Historical Marker: A.B. Michael (Wabasso) Bridge (2020) https://markers.flheritage.com/home/details/1133 Used for: WWII bridge restrictions
- Vero Beach Magazine: Celebrating Sebastian, A Big Small Town (July 15, 2024) https://verobeachmagazine.com/features/celebrating-sebastian-a-big-small-town/ Used for: postwar population, schools, downtown
- City of Sebastian: The History of Sebastian Drainage System https://cityofsebastian.org/434/The-History-of-Sebastian-Drainage-System Used for: GDC late-1950s street and drainage grid
- U.S. Fish and Wildlife Service: Pelican Island NWR, About Us https://www.fws.gov/refuge/pelican-island/about-us Used for: 1943 erosion, 1959 preservation league, refuge expansion
- 1715 Fleet Society: History https://1715fleetsociety.com/history/ Used for: 1960 start of modern treasure hunting
- National Park Service NPGallery: Old Town Sebastian Historic District East (NRIS 03000728) https://npgallery.nps.gov/AssetDetail/NRIS/03000728 Used for: historic district location and periods of significance
How this page was made
Digital Towns uses AI assistance to research and write its guides, and every page is only as good as the sources it cites. Our goal is the most accurate, useful local information possible.
This page was fact-checked twice before publishing.
If you see an error, or anything you can show is false, tell us right away and we will take a third look.
Report an error
Thank you. We'll take a third look and correct the page if it's wrong.



