Boston NOAA Tide Station 8443970

About NOAA station 8443970

The Boston station provides a central water-level reference for Boston Harbor, its islands, shipping channels, rivers, piers, and outer-harbor approaches.

Why people check this station

The prediction helps with harbor access, bridge and shoreline clearance, fishing structure, island landings, and understanding how much water will move through harbor constrictions.

How to interpret the prediction locally

River mouths, island passages, and the outer harbor can lag or lead the downtown gauge. Pair the prediction with wind, visibility, vessel traffic, and the marine forecast for the full route.

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

1. Confirm that station 8443970 represents the water you intend to use.
2. Note the predicted high and low times, heights, and overall range.
3. Check wind, waves, visibility, precipitation, and official warnings.
4. Allow for the local offset between the gauge and your exact location.
5. 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.

Official references

• NOAA CO-OPS station 8443970
• NOAA tide predictions for Boston
• NOAA tide and current FAQs
• National Weather Service marine forecasts