
Florida
Tonight
🌗 46% moon
7.6 h fully dark
Crowds
low
Open today
Open
Entrance
$15
Fee Stations Credit Card Only
Fee Stations are only accepting credit cards for the purchase of entry tickets and passes.
Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United States and interprets more than 450 years of cultural intersections.
$15.00 — Entrance - Per Person
The Castillo de San Marcos is open to the public 7 days per week, except Thanksgiving Day (fourth Thursday in November) and Christmas Day (December 25). A maximum capacity of 100 visitors in the historic fort at any time will be in effect. First admission is at 9:00 a.m. and last admission is at 5:00 p.m. The Castillo closes and visitors must exit at 5:15 p.m. The park grounds are closed from midnight until 5:30 a.m.
Generally open:
winterspringsummerfallHours are reported by the park — verify before you go.
📞 9048296506
✉ casa_ranger_activities@nps.govQuietest months (fewer crowds): Aug, Sep, Oct
Typical crowds: low
Weather now: ⛅ Partly cloudy, 84°F
🌦️ 85°/74°
🌦️ 84°/74°
⛈️ 93°/76°
Typical monthly recreation visits · NPS avg 2023–2025 — orange months are the quietest by crowds.
Quietest months
Relative crowds by month — lighter is quieter; ringed months are the calmest by crowds.
Jan
73%
Feb
72%
Mar
100%
Apr
78%
May
57%
Jun
59%
Jul
64%
Aug
41%
Sep
40%
Oct
29%
Nov
64%
Dec
86%
Log a sky reading
Measured the sky with an SQM meter or app? Add your reading (16 = city glow … 22 = pristine). Opt in under “Travelers like you” to share it on the community leaderboard.
48 audio-described place(s)
Reported by the park — verify before you go.
Castillo Visitor Lot · 111 accessible spacesaccessible
Not an official safety source — always defer to NPS.gov and rangers for life-safety decisions.
A visual read on Castillo de San Marcos National Monument — its character, trails, sky, and weather.
Park fingerprint
How this park scores across the dimensions travelers care about.
3-day forecast
Daily high and low temperatures (°F).
Figures tied to Castillo de San Marcos National Monument — each spans a cross-park journey.
Christopher Gadsden
— American Revolution, Politicians Government Officials, South CarolinaOsceola
— Native American, Native American History, SeminoleSir Francis Drake
— Battle Of San Juan, Caribbean, Castillo De San MarcosMark the stamps you've collected — they show in your memory and along your routes.
🎫 Museum Store

A Living Seawall
audio
Artillery Complex
audio
Artillery Complex 2
audio
Become a Junior Ranger

Casement 4 Timeline Exhibit
audio
Castillo Artillery Tour

Castillo Construction Exhibit Room
audio
Castillo Rules & Regulations
audio
Castillo Stories 360

Chapel
audio
City Gate
audio
Courtyard
audio🎧 Changing Flags ↗ · 3 mintranscript
🎧 The Execution Wall ↗ · 3 mintranscript
🎧 The Great Escape ↗ · 4 mintranscript
🎧 The Dungeon ↗ · 4 mintranscript
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View recipients of the National Park Service Freeman Tilden Awards, which recognize outstanding contributions to the practice of interpretation and education by NPS employees.
Between 1938 and 1941 the National Park Service (NPS) Western Museum Laboratories (WML) created many iconic posters. Often described as “the WPA park posters,” they should be called “the WML posters.” Research reveals more designs than previously thought (including several previously unknown ones), reevaluates what is known about the artists, and argues that modern reproductions have made the designs more significant to NPS graphic identity today than they were in the past.
The National Park Service (NPS) was only 26 years old when the United States entered World War II. The young bureau faced very real threats to its mission, with increasing pressure to contribute its natural and cultural resources to the war effort even as its budget and staff were slashed. Under the leadership of Director Newton B. Drury, the NPS was able to do its part for the war while maintaining its public trust responsibilities to the American people.
The park ranger uniform is known the world over. Perhaps the most iconic part of the uniform is the broad-brimmed flat hat. Over the last century, however, many different kinds of hats have been worn by rangers depending on their gender, where they work, the season of the year, and the jobs they do. While a pith helmet may bring up images of Colonial Britain, World War II soldiers, explorers, or people on safaris, for a while it was also be worn by some park rangers.
"One man's trash is another man's treasure." What?! Complete an archaeology activity to discover how "trash" can teach us a lot about people from the past.
Experience a cannon firing, examine 3D models of artillery, and build your own paper cannon.
Do you have what it takes to defend your town? Construct your own fort out of materials you have at home!
Did you know cannons harnessed the power of a chemical reaction to function? Discover more by conducting an experiment using the scientific method to produce a chemical reaction with an Alka-Seltzer cannon. Apply what you learn about chemical reactions to the loading and firing of cannon to understand the reality faced by the gun crews at the Castillo and Fort Matanzas.
Park-grounded courses you can learn with the Ranger.
Coquina: The Mighty Tiny Shell
Open →
DBQ Essay: Effects of Spanish Rule
Open →
Florida Animal Adaptations
Open →
Food Chains
Open →
Life of a Spanish Soldier
Open →
Marching for the Movement in St. Augustine
Open →
Native American and European Encounters
Open →
Pre and Post Field Trip Activities
Open →
Pre and Post Field Trip Activities
Open →
Sea Level Rise
Open →
Seeking Sanctuary on the Underground Railroad
Open →
The Columbian Exchange
Open →
This park's activities, topics, location, and on-the-ground places — one hop in the graph. Drag to explore; click an activity, topic, or related park to follow it.
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