Today's high and low tide times for Chatham, MA, plus a 7-day tide table. Astronomical predictions from the nearest harmonic station — free and updated daily.
In Chatham, MA, the next high tide is at 3:09 AM (2.05 m) and the next low tide is at 9:39 AM (0.16 m), based on harmonic predictions for Chatham Harbor, Aunt Lydias Cove.
All high and low tides for Chatham today, in local time (America/New York). Heights are metres above chart datum.
High (H) and low (L) tide times and heights for the next seven days at Chatham.
| Date | Tides (local time · height) |
|---|---|
| Sun, Aug 16 | H 3:09 AM 2.05 mL 9:39 AM 0.16 mH 3:30 PM 1.95 mL 9:57 PM 0.19 m |
| Mon, Aug 17 | H 3:54 AM 2.03 mL 10:30 AM 0.21 mH 4:18 PM 1.84 mL 10:42 PM 0.30 m |
| Tue, Aug 18 | H 4:39 AM 1.98 mL 11:24 AM 0.27 mH 5:06 PM 1.72 mL 11:30 PM 0.41 m |
| Wed, Aug 19 | H 5:24 AM 1.93 mL 12:18 PM 0.33 mH 5:57 PM 1.60 m |
| Thu, Aug 20 | L 12:21 AM 0.52 mH 6:12 AM 1.88 mL 1:15 PM 0.38 mH 6:54 PM 1.50 m |
| Fri, Aug 21 | L 1:12 AM 0.61 mH 7:03 AM 1.83 mL 2:12 PM 0.41 mH 7:51 PM 1.44 m |
| Sat, Aug 22 | L 2:06 AM 0.67 mH 7:57 AM 1.79 mL 3:09 PM 0.42 mH 8:51 PM 1.41 m |
Predicted from Chatham Harbor, Aunt Lydias Cove, 1 km away (reliability: high — a close match — expect predictions within a few minutes of the published station table).
These are astronomical tide predictions — the rise and fall driven by the moon and sun, computed by harmonic analysis. They do not include weather effects: a strong onshore wind, low barometric pressure or a storm surge can push the real water level above the predicted high, and offshore winds or high pressure can hold it below the predicted low. For navigation or any safety-critical decision, always check the official tide tables and a live water-level gauge for Chatham.
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