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Castillo de San Marcos National Monument Weather Warning NWS WEATHER ALERT FOR THE CASTILLO DE SAN MARCOS NATIONAL MONUMENT, FL AREA - DENSE FOG ADVISORY Issued: 519 AM EST Fri Mar 6 2026 Castillo de San Marcos National Monument Weather Warning

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Castillo de San Marcos National Monument, FL Weather - Hour by Hour Forecast

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Castillo de San Marcos National Monument, FL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Fog. Temperature is 62°F17°C, dew point 62°F17°C, humidity 100%. Wind direction is N at 0 mph0 km/h with visibility of 1/4 mi2 km. Barometric pressure is 30.22 in1023 mb.
Today - Mostly sunny. Areas of dense fog this morning. A chance of showers this afternoon. Highs in the upper 70s. Southeast winds 5 to 10.. Full Forecast
Tonight - Partly cloudy. Patchy fog after midnight. Lows in the lower 60s. Southeast winds 5 to 10 mph... Full Forecast

Castillo de San Marcos National Monument Hourly Weather

24 Hour Forecast Scroll
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Castillo de San Marcos National Monument, FL Hourly Weather - Mostly Cloudy - 5:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Mostly Clear - 6:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Mostly Clear - 7:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Mostly Clear - 8:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 9:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 10:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 11:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 12:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 1:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 2:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 3:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 4:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Partly Cloudy - 5:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 6:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 7:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 8:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 9:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 10:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 11:00 PM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 12:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 1:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 2:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 3:00 AM Castillo de San Marcos National Monument, FL Hourly Weather - Clear - 4:00 AM
Mostly Cloudy Mostly Clear Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear
67°F19°C 67°F19°C 67°F19°C 70°F21°C 72°F22°C 75°F24°C 76°F24°C 77°F25°C 78°F26°C 77°F25°C 77°F25°C 76°F24°C 74°F23°C 73°F23°C 71°F22°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 66°F19°C
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11% 11% 11% 4% 4% 4% 4% 4% 4% 16% 16% 16% 16% 16% 16% 14% 14% 14% 14% 14% 14% 2% 2% 2%
65°F18°C 65°F18°C 65°F18°C 66°F19°C 66°F19°C 67°F19°C 67°F19°C 68°F20°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 67°F19°C 66°F19°C 66°F19°C 66°F19°C 65°F18°C 65°F18°C 65°F18°C 64°F18°C 64°F18°C 64°F18°C 64°F18°C 64°F18°C
93% 93% 93% 87% 81% 76% 74% 74% 71% 74% 71% 74% 79% 79% 84% 87% 84% 87% 87% 87% 87% 90% 90% 93%
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Hour (EST)
Weather
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POP = Probability of Precipitation. ** Indicates missing data/values from KSGJ model statistics.

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Prob Precip % = Probability of Precipitation.

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POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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