Mid-Atlantic
North Channel Bridge
Grassy Bay · New York · NOAA station 8517201 · Tide predictions
40.6450, -73.8367
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48-hour outlook
Drag across the curve to inspect any time. Weather icons show the forecast at each high tide.
Drawn from the high/low predictions — NOAA publishes high/low only for this station.
The next seven days
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H = high tide · L = low tide · highs & lows in local time
On the water nearby
New York Harbor Entrance buoy · 20 mi S · Station 44065
Wind & wave reports →
Nearby tide stations
- Canarsie · 2.7 mi W
- J.F.K. International Airport · 3.2 mi SE
- Beach Channel (bridge) · 4.0 mi S
- Motts Basin · 4.6 mi SE
- Norton Point, Head of Bay · 4.8 mi E
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 7.3 ft — Mon Aug 2 · 8:59 PM
Lowest predicted low tide: -1.1 ft — Sun Jan 24 · 3:55 PM
Biggest single-day swing: 7.9 ft on Tue Aug 3
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Jan 24 | 3:55 PM | -1.1 ft |
| Sat Jan 23 | 3:09 PM | -1.1 ft |
| Sun Feb 21 | 2:43 PM | -1.0 ft |
| Mon Feb 22 | 3:27 PM | -1.0 ft |
| Mon Jan 25 | 4:40 PM | -1.0 ft |
| Fri Jan 22 | 2:19 PM | -0.9 ft |
| Sat Feb 20 | 1:56 PM | -0.9 ft |
| Tue Feb 23 | 4:09 PM | -0.8 ft |
| Tue Jan 26 | 5:22 PM | -0.7 ft |
| Mon Mar 22 | 3:13 PM | -0.7 ft |
171 minus tides (below 0 ft) are predicted here in 2027. The table shows up to the 10 lowest that fall between 7 AM and 7 PM — the ones worth planning a clam dig or tidepool walk around.
About this station
North Channel Bridge, Grassy Bay is one of NOAA's reference tide stations — its predictions are computed directly from harmonic analysis of water levels observed here, and other nearby stations are calculated from it.
Barrier islands, big bays, and river tides: Chesapeake and Delaware bays carry the tide deep inland, and a nor'easter can hold water in, or blow it out, for days at a time.