Block Island (Old Harbor) Tide Chart & Fishing Times
Tide times, heights, and solunar bite windows for Block Island (Old Harbor), Rhode Island — August 2026 & September 2026. Every value is computed from NOAA harmonic constituents, the same offline engine that powers the Ebb app.
NOAA Station
8459338
Type
Harmonic (reference)
Coordinates
41.173, -71.557
Time Zone
New York
Sun, moon & bite windows
Sunday, August 2
Sunday, August 2
Sunrise 5:42 AM · Sunset 8:01 PM · Moon Waning Gibbous (84% lit)
Low 4:18a · 0.1 ftHigh 10:44a · 3.1 ftLow 4:33p · 0.4 ftHigh 11p · 3.0 ft
Major window ★★★
2:37a – 4:37a
Minor window ★★★
9:15a – 10:15a
Major window ★★★
2:51p – 4:51p
Minor window ★★★
9:23p – 10:23p
Best fishing days — August 2026
Top solunar bite days this month
Ranked by solunar quality — days when the major feeding windows stack up with sunrise, sunset, or a strong tide swing.
Monday, Aug 3 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 3:20a–5:20a, 3:35p–5:35p
Tuesday, Aug 4 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 4:05a–6:05a, 4:21p–6:21p
Wednesday, Aug 5 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 4:53a–6:53a, 5:12p–7:12p
Thursday, Aug 6 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 5:45a–7:45a, 6:09p–8:09p
Friday, Aug 7 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 6:43a–8:43a, 7:11p–9:11p
Wednesday, Aug 19 ★★★
Major window stacks with dawn/dusk and a tide swing
Major windows: 4:54a–6:54a, 5:14p–7:14p
Tide table — August 2026
Block Island (Old Harbor) tides, August 2026
All high and low tides for Block Island (Old Harbor), in local time (New York). Heights are feet above Mean Lower Low Water (MLLW).
| Day | Tides (height above MLLW) | Sunrise / Sunset | |
|---|---|---|---|
| 1 | Sat | L 3:52a 0.1 ftH 10:04a 3.0 ftL 3:53p 0.3 ftH 10:19p 3.2 ft | 5:41a / 8:02p |
| 2 | Sun | L 4:18a 0.1 ftH 10:44a 3.1 ftL 4:33p 0.4 ftH 11p 3.0 ft | 5:42a / 8:01p |
| 3 | Mon | L 4:49a 0.1 ftH 11:28a 3.2 ftL 5:20p 0.5 ftH 11:45p 2.9 ft | 5:43a / 8p |
| 4 | Tue | L 5:27a 0.1 ftH 12:16p 3.2 ftL 6:16p 0.6 ft | 5:44a / 7:59p |
| 5 | Wed | H 12:36a 2.7 ftL 6:14a 0.2 ftH 1:08p 3.3 ftL 7:28p 0.6 ft | 5:45a / 7:58p |
| 6 | Thu | H 1:33a 2.6 ftL 7:09a 0.2 ftH 2:05p 3.3 ftL 9:02p 0.6 ft | 5:46a / 7:56p |
| 7 | Fri | H 2:35a 2.6 ftL 8:12a 0.3 ftH 3:11p 3.3 ftL 10:25p 0.5 ft | 5:47a / 7:55p |
| 8 | Sat | H 3:46a 2.6 ftL 9:24a 0.2 ftH 4:25p 3.4 ftL 11:30p 0.3 ft | 5:48a / 7:54p |
| 9 | Sun | H 4:59a 2.8 ftL 10:43a 0.1 ftH 5:34p 3.6 ft | 5:49a / 7:53p |
| 10 | Mon | L 12:25a 0.1 ftH 6:02a 3.0 ftL 11:54a 0.0 ftH 6:33p 3.8 ft | 5:50a / 7:51p |
| 11 | Tue | L 1:16a -0.1 ftH 6:58a 3.3 ftL 12:56p -0.2 ftH 7:26p 3.9 ft | 5:51a / 7:50p |
| 12 | Wed | L 2:03a -0.2 ftH 7:50a 3.5 ftL 1:52p -0.3 ftH 8:15p 3.9 ft | 5:52a / 7:49p |
| 13 | Thu | L 2:46a -0.3 ftH 8:39a 3.7 ftL 2:44p -0.3 ftH 9:01p 3.8 ft | 5:53a / 7:47p |
| 14 | Fri | L 3:24a -0.3 ftH 9:27a 3.7 ftL 3:31p -0.2 ftH 9:46p 3.6 ft | 5:54a / 7:46p |
| 15 | Sat | L 3:58a -0.2 ftH 10:13a 3.7 ftL 4:16p 0.0 ftH 10:29p 3.4 ft | 5:55a / 7:44p |
| 16 | Sun | L 4:28a 0.0 ftH 10:59a 3.6 ftL 5:01p 0.2 ftH 11:13p 3.1 ft | 5:56a / 7:43p |
| 17 | Mon | L 4:56a 0.1 ftH 11:45a 3.4 ftL 5:50p 0.5 ftH 11:57p 2.8 ft | 5:57a / 7:42p |
| 18 | Tue | L 5:26a 0.4 ftH 12:33p 3.1 ftL 6:49p 0.7 ft | 5:58a / 7:40p |
| 19 | Wed | H 12:44a 2.5 ftL 6:04a 0.6 ftH 1:22p 2.9 ftL 7:58p 0.8 ft | 5:59a / 7:39p |
| 20 | Thu | H 1:34a 2.3 ftL 6:51a 0.7 ftH 2:16p 2.7 ftL 9:09p 0.9 ft | 6a / 7:37p |
| 21 | Fri | H 2:30a 2.1 ftL 7:49a 0.9 ftH 3:23p 2.6 ftL 10:16p 0.9 ft | 6:01a / 7:36p |
| 22 | Sat | H 3:43a 2.1 ftL 9:04a 0.9 ftH 4:38p 2.7 ftL 11:13p 0.9 ft | 6:02a / 7:34p |
| 23 | Sun | H 4:56a 2.2 ftL 10:36a 0.8 ftH 5:36p 2.8 ft | 6:03a / 7:33p |
| 24 | Mon | L 12:01a 0.7 ftH 5:49a 2.3 ftL 11:36a 0.7 ftH 6:20p 2.9 ft | 6:04a / 7:31p |
| 25 | Tue | L 12:42a 0.6 ftH 6:31a 2.5 ftL 12:23p 0.5 ftH 6:56p 3.1 ft | 6:05a / 7:30p |
| 26 | Wed | L 1:19a 0.4 ftH 7:08a 2.8 ftL 1:05p 0.4 ftH 7:30p 3.2 ft | 6:06a / 7:28p |
| 27 | Thu | L 1:51a 0.3 ftH 7:43a 3.0 ftL 1:45p 0.2 ftH 8:02p 3.3 ft | 6:07a / 7:26p |
| 28 | Fri | L 2:19a 0.1 ftH 8:19a 3.2 ftL 2:24p 0.2 ftH 8:37p 3.3 ft | 6:08a / 7:25p |
| 29 | Sat | L 2:44a 0.0 ftH 8:56a 3.4 ftL 3:01p 0.1 ftH 9:14p 3.3 ft | 6:09a / 7:23p |
| 30 | Sun | L 3:10a 0.0 ftH 9:34a 3.5 ftL 3:38p 0.2 ftH 9:53p 3.2 ft | 6:10a / 7:22p |
| 31 | Mon | L 3:40a 0.0 ftH 10:15a 3.5 ftL 4:18p 0.2 ftH 10:36p 3.1 ft | 6:11a / 7:20p |
Last QuarterAug 5
New MoonAug 12
First QuarterAug 19
Full MoonAug 27
Tide table — September 2026
Block Island (Old Harbor) tides, September 2026
| Day | Tides (height above MLLW) | Sunrise / Sunset | |
|---|---|---|---|
| 1 | Tue | L 4:15a 0.0 ftH 11a 3.5 ftL 5:03p 0.4 ftH 11:24p 2.9 ft | 6:12a / 7:18p |
| 2 | Wed | L 4:57a 0.1 ftH 11:50a 3.5 ftL 6p 0.5 ft | 6:13a / 7:17p |
| 3 | Thu | H 12:18a 2.8 ftL 5:47a 0.2 ftH 12:46p 3.4 ftL 7:28p 0.6 ft | 6:14a / 7:15p |
| 4 | Fri | H 1:18a 2.7 ftL 6:47a 0.3 ftH 1:49p 3.3 ftL 9:05p 0.6 ft | 6:15a / 7:13p |
| 5 | Sat | H 2:24a 2.6 ftL 8a 0.4 ftH 3p 3.3 ftL 10:18p 0.5 ft | 6:16a / 7:12p |
| 6 | Sun | H 3:37a 2.7 ftL 9:31a 0.4 ftH 4:17p 3.3 ftL 11:18p 0.4 ft | 6:17a / 7:10p |
| 7 | Mon | H 4:49a 2.9 ftL 10:57a 0.2 ftH 5:25p 3.5 ft | 6:18a / 7:08p |
| 8 | Tue | L 12:09a 0.2 ftH 5:50a 3.2 ftL 12p 0.0 ftH 6:20p 3.6 ft | 6:19a / 7:07p |
| 9 | Wed | L 12:54a 0.0 ftH 6:43a 3.4 ftL 12:54p -0.1 ftH 7:09p 3.7 ft | 6:20a / 7:05p |
| 10 | Thu | L 1:35a -0.1 ftH 7:32a 3.7 ftL 1:44p -0.2 ftH 7:54p 3.7 ft | 6:21a / 7:03p |
| 11 | Fri | L 2:12a -0.2 ftH 8:18a 3.8 ftL 2:30p -0.2 ftH 8:37p 3.6 ft | 6:22a / 7:02p |
| 12 | Sat | L 2:45a -0.2 ftH 9:01a 3.8 ftL 3:11p -0.1 ftH 9:18p 3.4 ft | 6:23a / 7p |
| 13 | Sun | L 3:12a -0.1 ftH 9:43a 3.7 ftL 3:49p 0.1 ftH 9:58p 3.2 ft | 6:24a / 6:58p |
| 14 | Mon | L 3:38a 0.1 ftH 10:24a 3.6 ftL 4:25p 0.3 ftH 10:38p 2.9 ft | 6:25a / 6:56p |
| 15 | Tue | L 4:06a 0.2 ftH 11:04a 3.3 ftL 5:01p 0.5 ftH 11:20p 2.7 ft | 6:26a / 6:55p |
| 16 | Wed | L 4:39a 0.5 ftH 11:47a 3.0 ftL 5:45p 0.7 ft | 6:27a / 6:53p |
| 17 | Thu | H 12:05a 2.4 ftL 5:18a 0.7 ftH 12:35p 2.8 ftL 6:55p 0.9 ft | 6:28a / 6:51p |
| 18 | Fri | H 12:56a 2.3 ftL 6:07a 0.8 ftH 1:29p 2.6 ftL 8:31p 1.0 ft | 6:29a / 6:50p |
| 19 | Sat | H 1:53a 2.2 ftL 7:10a 1.0 ftH 2:36p 2.5 ftL 9:43p 1.0 ft | 6:30a / 6:48p |
| 20 | Sun | H 3:02a 2.1 ftL 8:38a 1.0 ftH 3:56p 2.6 ftL 10:41p 0.9 ft | 6:31a / 6:46p |
| 21 | Mon | H 4:19a 2.2 ftL 10:20a 0.9 ftH 4:59p 2.7 ftL 11:26p 0.7 ft | 6:32a / 6:44p |
| 22 | Tue | H 5:15a 2.4 ftL 11:17a 0.7 ftH 5:43p 2.9 ft | 6:33a / 6:43p |
| 23 | Wed | L 12:03a 0.5 ftH 5:57a 2.7 ftL 12:03p 0.5 ftH 6:19p 3.0 ft | 6:34a / 6:41p |
| 24 | Thu | L 12:35a 0.4 ftH 6:33a 3.0 ftL 12:44p 0.3 ftH 6:53p 3.2 ft | 6:35a / 6:39p |
| 25 | Fri | L 1:04a 0.2 ftH 7:09a 3.3 ftL 1:24p 0.1 ftH 7:29p 3.3 ft | 6:36a / 6:38p |
| 26 | Sat | L 1:30a 0.0 ftH 7:46a 3.5 ftL 2:04p 0.0 ftH 8:07p 3.3 ft | 6:37a / 6:36p |
| 27 | Sun | L 2a -0.1 ftH 8:25a 3.7 ftL 2:43p 0.0 ftH 8:47p 3.3 ft | 6:38a / 6:34p |
| 28 | Mon | L 2:32a -0.2 ftH 9:06a 3.8 ftL 3:23p 0.0 ftH 9:31p 3.2 ft | 6:39a / 6:33p |
| 29 | Tue | L 3:09a -0.2 ftH 9:50a 3.8 ftL 4:05p 0.1 ftH 10:17p 3.1 ft | 6:40a / 6:31p |
| 30 | Wed | L 3:50a -0.1 ftH 10:38a 3.7 ftL 4:53p 0.2 ftH 11:08p 2.9 ft | 6:41a / 6:29p |
Last QuarterSep 3
New MoonSep 10
First QuarterSep 18
Full MoonSep 26
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Tide charts near Block Island (Old Harbor)
About this data
Predictions for Block Island (Old Harbor) are computed from NOAA CO-OPS harmonic constituents using Ebb's on-device engine (a Schureman/pytides harmonic model). They are astronomical tide predictions and do not account for weather, wind, or barometric pressure, which can shift real water levels. Solunar bite windows are a fishing-planning heuristic, not a guarantee. Ebb is a fishing- and trip-planning tool, not a navigation product — always consult NOAA Tides & Currents and official sources for navigation-critical decisions.