Today's high and low tide times for Block Island, RI, plus a 7-day tide table. Astronomical predictions from the nearest harmonic station — free and updated daily.
In Block Island, RI, the next high tide is at 10:51 AM (1.12 m) and the next low tide is at 4:45 AM (0.15 m), based on harmonic predictions for Block Island (Old Harbor).
All high and low tides for Block Island 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 Block Island.
| Date | Tides (local time · height) |
|---|---|
| Sun, Aug 16 | L 4:45 AM 0.15 mH 10:51 AM 1.12 mL 4:51 PM 0.14 mH 11:18 PM 1.22 m |
| Mon, Aug 17 | L 5:33 AM 0.21 mH 11:36 AM 1.03 mL 5:27 PM 0.21 m |
| Tue, Aug 18 | H 12:03 AM 1.17 mL 6:24 AM 0.28 mH 12:24 PM 0.94 mL 6:06 PM 0.28 m |
| Wed, Aug 19 | H 12:54 AM 1.11 mL 7:21 AM 0.34 mH 1:18 PM 0.86 mL 6:51 PM 0.35 m |
| Thu, Aug 20 | H 1:48 AM 1.06 mL 8:33 AM 0.38 mH 2:18 PM 0.81 mL 7:42 PM 0.41 m |
| Fri, Aug 21 | H 2:45 AM 1.03 mL 9:54 AM 0.40 mH 3:21 PM 0.78 mL 8:54 PM 0.44 m |
| Sat, Aug 22 | H 3:45 AM 1.01 mL 11:03 AM 0.38 mH 4:24 PM 0.79 mL 10:15 PM 0.44 m |
Predicted from Block Island (Old Harbor), 0.3 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 Block Island.
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