Boston Harbor (Deer Island Light) (depth 8 ft), Massachusetts Current
42.3378° N, 70.9558° W
Flood direction 264° true
Ebb direction 112° true

May 2026

DaySlackFlood

Slack
Ebb
SlackFlood

Slack
Ebb
SlackFlood

SlackPhaseSunriseSunsetMoonriseMoonset
Fri 013:44 AM EDT −1.4 kt6:07 AM EDT8:59 AM EDT 1.3 kt11:44 AM EDT3:59 PM EDT −1.2 kt6:13 PM EDT9:14 PM EDT 1.3 kt11:59 PM EDTFull Moon5:39 AM EDT7:43 PM EDT8:08 PM EDT5:10 AM EDT
Sat 024:30 AM EDT −1.4 kt6:52 AM EDT9:49 AM EDT 1.3 kt12:24 PM EDT4:37 PM EDT −1.1 kt6:53 PM EDT9:57 PM EDT 1.3 kt5:37 AM EDT7:44 PM EDT9:13 PM EDT5:37 AM EDT
Sun 0312:38 AM EDT5:09 AM EDT −1.3 kt7:36 AM EDT10:33 AM EDT 1.3 kt1:05 PM EDT5:04 PM EDT −1.0 kt7:33 PM EDT10:32 PM EDT 1.3 kt5:36 AM EDT7:45 PM EDT10:15 PM EDT6:09 AM EDT
Mon 041:18 AM EDT5:42 AM EDT −1.3 kt8:19 AM EDT11:10 AM EDT 1.2 kt1:47 PM EDT5:24 PM EDT −1.0 kt8:13 PM EDT10:53 PM EDT 1.2 kt5:35 AM EDT7:46 PM EDT11:12 PM EDT6:49 AM EDT
Tue 051:58 AM EDT6:11 AM EDT −1.2 kt9:00 AM EDT11:41 AM EDT 1.1 kt2:31 PM EDT5:51 PM EDT −1.0 kt8:54 PM EDT11:15 PM EDT 1.1 kt5:33 AM EDT7:47 PM EDT7:36 AM EDT
Wed 062:41 AM EDT6:43 AM EDT −1.1 kt9:40 AM EDT12:05 PM EDT 1.0 kt3:18 PM EDT6:32 PM EDT −0.9 kt9:36 PM EDT11:46 PM EDT 1.0 kt5:32 AM EDT7:48 PM EDT12:02 AM EDT8:31 AM EDT
Thu 073:25 AM EDT7:25 AM EDT −1.0 kt10:21 AM EDT12:37 PM EDT 0.9 kt4:07 PM EDT7:29 PM EDT −0.9 kt10:21 PM EDT5:31 AM EDT7:49 PM EDT12:44 AM EDT9:32 AM EDT
Fri 0812:28 AM EDT 0.9 kt4:10 AM EDT8:09 AM EDT −1.0 kt11:04 AM EDT1:28 PM EDT 0.9 kt4:57 PM EDT8:22 PM EDT −0.9 kt11:11 PM EDT5:30 AM EDT7:51 PM EDT1:19 AM EDT10:37 AM EDT
Sat 091:21 AM EDT 0.9 kt4:59 AM EDT8:49 AM EDT −1.0 kt11:52 AM EDT2:24 PM EDT 0.9 kt5:51 PM EDT9:09 PM EDT −0.9 ktLast Quarter5:28 AM EDT7:52 PM EDT1:48 AM EDT11:44 AM EDT
Sun 1012:08 AM EDT2:18 AM EDT 0.8 kt5:52 AM EDT9:30 AM EDT −1.0 kt12:44 PM EDT3:06 PM EDT 0.9 kt6:45 PM EDT9:59 PM EDT −0.9 kt5:27 AM EDT7:53 PM EDT2:13 AM EDT12:51 PM EDT
Mon 111:05 AM EDT3:12 AM EDT 0.9 kt6:47 AM EDT10:19 AM EDT −1.0 kt1:34 PM EDT3:50 PM EDT 1.0 kt7:33 PM EDT11:03 PM EDT −1.0 kt5:26 AM EDT7:54 PM EDT2:35 AM EDT1:59 PM EDT
Tue 121:58 AM EDT4:05 AM EDT 0.9 kt7:39 AM EDT11:26 AM EDT −1.0 kt2:22 PM EDT4:40 PM EDT 1.1 kt8:16 PM EDT5:25 AM EDT7:55 PM EDT2:56 AM EDT3:09 PM EDT
Wed 1312:08 AM EDT −1.0 kt2:49 AM EDT5:05 AM EDT 1.0 kt8:28 AM EDT12:22 PM EDT −1.1 kt3:09 PM EDT5:34 PM EDT 1.2 kt8:59 PM EDT5:24 AM EDT7:56 PM EDT3:17 AM EDT4:22 PM EDT
Thu 1412:57 AM EDT −1.1 kt3:40 AM EDT6:05 AM EDT 1.2 kt9:18 AM EDT1:06 PM EDT −1.2 kt3:58 PM EDT6:23 PM EDT 1.3 kt9:44 PM EDT5:23 AM EDT7:57 PM EDT3:40 AM EDT5:39 PM EDT
Fri 151:41 AM EDT −1.2 kt4:34 AM EDT6:55 AM EDT 1.3 kt10:11 AM EDT1:49 PM EDT −1.2 kt4:47 PM EDT7:08 PM EDT 1.4 kt10:31 PM EDT5:22 AM EDT7:58 PM EDT4:08 AM EDT7:00 PM EDT
Sat 162:33 AM EDT −1.3 kt5:26 AM EDT7:45 AM EDT 1.4 kt11:03 AM EDT2:40 PM EDT −1.2 kt5:35 PM EDT7:55 PM EDT 1.5 kt11:17 PM EDTNew Moon5:21 AM EDT7:59 PM EDT4:41 AM EDT8:24 PM EDT
Sun 173:37 AM EDT −1.4 kt6:18 AM EDT8:38 AM EDT 1.5 kt11:52 AM EDT3:43 PM EDT −1.2 kt6:23 PM EDT8:46 PM EDT 1.6 kt5:20 AM EDT8:00 PM EDT5:25 AM EDT9:44 PM EDT
Mon 1812:03 AM EDT4:33 AM EDT −1.5 kt7:10 AM EDT9:35 AM EDT 1.5 kt12:41 PM EDT4:37 PM EDT −1.2 kt7:12 PM EDT9:39 PM EDT 1.6 kt5:19 AM EDT8:01 PM EDT6:21 AM EDT10:54 PM EDT
Tue 1912:50 AM EDT5:22 AM EDT −1.5 kt8:03 AM EDT10:26 AM EDT 1.5 kt1:32 PM EDT5:26 PM EDT −1.2 kt8:05 PM EDT10:29 PM EDT 1.6 kt5:18 AM EDT8:02 PM EDT7:30 AM EDT11:49 PM EDT
Wed 201:40 AM EDT6:13 AM EDT −1.5 kt8:56 AM EDT11:14 AM EDT 1.5 kt2:27 PM EDT6:21 PM EDT −1.1 kt8:59 PM EDT11:18 PM EDT 1.6 kt5:17 AM EDT8:03 PM EDT8:46 AM EDT
Thu 212:35 AM EDT7:17 AM EDT −1.4 kt9:49 AM EDT12:04 PM EDT 1.4 kt3:24 PM EDT7:31 PM EDT −1.1 kt9:55 PM EDT5:16 AM EDT8:04 PM EDT10:05 AM EDT12:32 AM EDT
Fri 2212:10 AM EDT 1.4 kt3:34 AM EDT8:19 AM EDT −1.3 kt10:43 AM EDT1:08 PM EDT 1.3 kt4:22 PM EDT8:36 PM EDT −1.1 kt10:55 PM EDT5:16 AM EDT8:05 PM EDT11:20 AM EDT1:05 AM EDT
Sat 231:16 AM EDT 1.2 kt4:36 AM EDT9:15 AM EDT −1.3 kt11:41 AM EDT2:27 PM EDT 1.2 kt5:24 PM EDT9:35 PM EDT −1.1 ktFirst Quarter5:15 AM EDT8:06 PM EDT12:32 PM EDT1:31 AM EDT
Sun 2412:01 AM EDT2:41 AM EDT 1.1 kt5:43 AM EDT10:14 AM EDT −1.2 kt12:41 PM EDT3:32 PM EDT 1.2 kt6:29 PM EDT10:44 PM EDT −1.1 kt5:14 AM EDT8:07 PM EDT1:40 PM EDT1:53 AM EDT
Mon 251:08 AM EDT3:56 AM EDT 1.1 kt6:53 AM EDT11:23 AM EDT −1.1 kt1:40 PM EDT4:35 PM EDT 1.2 kt7:29 PM EDT11:54 PM EDT −1.2 kt5:13 AM EDT8:08 PM EDT2:46 PM EDT2:13 AM EDT
Tue 262:11 AM EDT5:08 AM EDT 1.1 kt7:54 AM EDT12:22 PM EDT −1.1 kt2:34 PM EDT5:38 PM EDT 1.2 kt8:21 PM EDT5:13 AM EDT8:09 PM EDT3:50 PM EDT2:32 AM EDT
Wed 2712:49 AM EDT −1.3 kt3:09 AM EDT6:09 AM EDT 1.2 kt8:49 AM EDT1:11 PM EDT −1.1 kt3:24 PM EDT6:30 PM EDT 1.2 kt9:11 PM EDT5:12 AM EDT8:10 PM EDT4:55 PM EDT2:52 AM EDT
Thu 281:38 AM EDT −1.3 kt4:04 AM EDT6:59 AM EDT 1.2 kt9:41 AM EDT1:55 PM EDT −1.1 kt4:13 PM EDT7:15 PM EDT 1.3 kt10:01 PM EDT5:11 AM EDT8:10 PM EDT6:00 PM EDT3:14 AM EDT
Fri 292:27 AM EDT −1.3 kt4:56 AM EDT7:46 AM EDT 1.2 kt10:32 AM EDT2:39 PM EDT −1.1 kt5:00 PM EDT7:59 PM EDT 1.2 kt10:49 PM EDT5:11 AM EDT8:11 PM EDT7:04 PM EDT3:40 AM EDT
Sat 303:17 AM EDT −1.3 kt5:44 AM EDT8:35 AM EDT 1.2 kt11:18 AM EDT3:25 PM EDT −1.0 kt5:43 PM EDT8:45 PM EDT 1.2 kt11:32 PM EDT5:10 AM EDT8:12 PM EDT8:07 PM EDT4:10 AM EDT
Sun 314:05 AM EDT −1.3 kt6:28 AM EDT9:26 AM EDT 1.2 kt12:00 PM EDT4:05 PM EDT −1.0 kt6:24 PM EDT9:31 PM EDT 1.2 ktFull Moon5:09 AM EDT8:13 PM EDT9:06 PM EDT4:47 AM EDT

NOT FOR NAVIGATION

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  The author and the publisher each assume no liability for damages arising from use of these predictions.  They are not certified to be correct, and they do not incorporate the effects of tropical storms, El Niño, seismic events, subsidence, uplift, or changes in global sea level.

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