Massachusetts
Chatham tides
Tide charts & times for Chatham, Massachusetts · read from NOAA station Chatham Harbor, Aunt Lydias Cove (#8447435)
Aunt Lydias Cove · Massachusetts · NOAA station 8447435 · Tide predictions
41.6885, -69.9511
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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
Stations named for Chatham
- Chatham Harbor, Aunt Lydias Cove · #8447435
- Chatham, Stage Harbor · #8447505
This page reads the Chatham Harbor, Aunt Lydias Cove station; the others serve nearby shores with the same name.
On the water nearby
Nantucket Sound buoy · 22 mi SW · Station 44020
Wind & wave reports →
Nearby tide stations
- Chatham, Stage Harbor · 1.7 mi SW
- Pleasant Bay · 3.7 mi NW
- Saquatucket Harbor · 5.6 mi W
- Wychmere Harbor · 6.1 mi W
- Dennisport · 8.7 mi W
Plan ahead
2027 tide extremes for this station
Highest predicted high tide: 6.5 ft — Mon Jul 5 · 12:57 AM
Lowest predicted low tide: -0.8 ft — Sun Jan 24 · 8:05 PM
Biggest single-day swing: 7.3 ft on Sat Jan 23
Best daytime minus tides of 2027
| Date | Low tide | Height |
|---|---|---|
| Sun Feb 21 | 6:52 PM | -0.7 ft |
| Fri Jan 22 | 6:27 PM | -0.7 ft |
| Sat Feb 20 | 6:05 PM | -0.7 ft |
| Wed Jul 7 | 9:53 AM | -0.7 ft |
| Tue Jul 6 | 9:03 AM | -0.7 ft |
| Wed Aug 4 | 8:38 AM | -0.6 ft |
| Thu Jul 8 | 10:42 AM | -0.6 ft |
| Thu Aug 5 | 9:26 AM | -0.6 ft |
| Tue Mar 23 | 7:51 AM | -0.6 ft |
| Wed Mar 24 | 8:41 AM | -0.6 ft |
341 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
Chatham Harbor, Aunt Lydias Cove 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.
Rocky shores and the country's biggest northern ranges: Eastport flirts with 20 ft, and the Gulf of Maine funnels weather as much as tide. Harbors here float — or sit in the mud — on the moon's schedule.