Coverage · 436 NPS places tracked 86 source-reviewed briefsPlanning · Seasonal windows modeled and labeledOperations · Official alerts verify at nps.govSource-reviewed · Place briefs with dated source cardsCatalog · Preview pages identity snapshot onlyListening · Procedural cues never field recordings
National Monument · Castillo de San Marcos National Monument

Castillo de San Marcos National Monument

Best primary window for Castillo de San Marcos: May, with April and June as strong shoulder months.

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.

This page identifies Castillo de San Marcos National Monument from the checked-in NPS snapshot, dated source cards, and the month windows listed here.

Answer Brief

Answer-first planning signal

Best current use
Castillo de San Marcos National Monument is listed as a National Monument in the checked-in NPS identity snapshot.
Best months
May, April, June
Peak crowd months
July, August, June
Current signal
Castillo de San Marcos National Monument is listed as a National Monument in FL in the checked-in NPS identity snapshot. 4 source cards on this page. Data snapshot: October 27, 2026. Official NPS page: https://www.nps.gov/casa/index.htm.
Visitor takeaway
Month windows for Castillo de San Marcos National Monument are listed on this page. Official NPS page: https://www.nps.gov/casa/index.htm.
What it sounds like
Castillo de San Marcos audio on this page is a labeled modeled cue, not a field recording.

Summary at a glance

Castillo de San Marcos National Monument is listed as a National Monument in the checked-in NPS identity snapshot. 4 source cards on this page. Data snapshot: October 27, 2026. Listed month windows: May, April, and June.

Best Months
May
↑ April, June
Budget Months
April
March, May
Peak Crowd
July
August, June
Region
coastal atlantic
Core Experiences
architecture-and-buildingfortshispanic-american-heritagemaritimecoastal-defensesLiving HistoryHistoric Weapons DemonstrationJunior Ranger ProgramPark Film

Month-by-month

Month windows on this page: May, April, and June listed as the primary window; July, August, and June listed as peak months; April, March, and May listed as lower-crowd months.

Primary Window

Listed primary window: May, April, and June.

Peak months

Listed peak months: July, August, and June.

Lower-crowd months

Listed lower-crowd months: April, March, and May.

Getting there

Use the closest major airport and a regional drive plan for Castillo de San Marcos.

On State Route A1A overlooking Matanzas Bay in the heart of the historic district of Saint Augustine, the Castillo is approximately a five mile drive from Interstate 95.

Place instrument

Clock, compare, and listen

Compare places

Season and now

Twelve-month planning is modeled from the published seasonal profile. The current hand stays unavailable until sourced alerts, hours, events, roads, and weather are fresh.

Current hand
Not available

Three listening lanes

Official NPS audio: Not provided for this snapshot.

Synthetic browser audio, never a field recording or live observation.

Jamcorder: Shared station.

Text equivalent for the seasonal place clock
MonthVisitabilityCrowd pressure
January4924
February5324
March6028
April6342
May6458
June6276
July5992
August6090
September6174
October6156
November5834
December5228

The cue is a browser-generated composition, not a field recording. How NPS Sounds modeled audio works.

Methodology

This page uses the checked-in NPS identity snapshot for Castillo de San Marcos National Monument, the 4 source cards below, and the figures listed above. Data snapshot: October 27, 2026. Read the NPS Sounds methodology and about NPS Sounds for how pages are assembled.

  • Data snapshot: October 27, 2026
  • Source cards: 4

Data Behind This Reading

Source provenance

NPS identity

high

Castillo de San Marcos National Monument is identified as National Monument with NPS code casa.

Available · Data snapshot: October 27, 2026

Source

Official operations

limited

Official alerts should be verified on the NPS page. This site uses a checked-in snapshot, not a live operations feed.

From the data snapshot · Data snapshot: October 27, 2026

Source

Weather and seasonality

limited

St. Augustine has a semi-tropical climate with over 300 days of sunshine each year. Summers (May-September) are hot, bright, and humid with afternoon thunderstorms common. Temperatures range from the lower 70s to the mid 90s F. Spring (March-mid-May) and Autumn (October-late November) can be pleasant with temperatures ranging from the upper 50s into the 80s F. The Winter months (December-March) are usually dry. Temperatures can be cool ranging from the upper 30s through the 60sF.

Modeled · Data snapshot: October 27, 2026

Source

How this page is assembled

limited

place page source cards come from the data snapshot October 27, 2026.

Data snapshot: October 27, 2026

Source