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Patapsco River · NOAA 8574680
Baltimore, Fort McHenry NOAA Tide Station 8574680
Weather, daylight, and tide predictions for the exact NOAA station at 39.2667, -76.5783, plus practical notes for interpreting this reference around Patapsco River.
Open the full Outgoing Tide dashboard →Reviewed July 17, 2026
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Station 8574680 conditions snapshot
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NOAA station: Baltimore, Fort McHenry
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For the latest available data, refresh your browser. This page loads once and does not poll in the background. Predictions are water levels at the station, not navigation guidance or a guarantee of safe conditions.
About NOAA station 8574680
The Baltimore station measures water levels in the Patapsco River near Fort McHenry, serving the Inner Harbor, port facilities, nearby tributaries, and upper Chesapeake Bay access.
Why people check this station
It provides useful context for dock and ramp depth, waterfront access, harbor fishing, coastal flooding, and water movement around port structure.
How to interpret the prediction locally
Freshwater flow, sustained wind across Chesapeake Bay, and distance from the bay mouth can shift observed levels. Current and water quality should be checked separately.
Tide height is not current speed
A high or low prediction describes the expected water level at the gauge. Current can turn earlier or later in a nearby inlet, river, bridge opening, pass, or channel. NOAA publishes separate current predictions for supported locations, and local weather can move the observed level above or below the astronomical prediction.
Basic station-planning checklist
- Confirm that station 8574680 represents the water you intend to use.
- Note the predicted high and low times, heights, and overall range.
- Check wind, waves, visibility, precipitation, and official warnings.
- Allow for the local offset between the gauge and your exact location.
- Verify actual water, access, navigation, and regulations before departure.
Planning only: Data can be delayed, unavailable, or unrepresentative of a nearby micro-location. Never use this page as a substitute for official charts, notices, warnings, or direct observation.