NOAA prediction analysis · station-local time

Boston Tide Chart: Widest Difference Between Two Daily High-to-Low Falls

The answer

In NOAA's 30-day Boston, Massachusetts sequence, 2026-11-27 has the widest difference between its two listed high-to-low falls: 2.98 ft (0.910 m). The first change is 9.91 ft and the second is 12.90 ft.

How it was calculated

This analysis compares the two same-pattern, consecutive tide changes that NOAA lists on each station-local date.

It uses only NOAA's published turning points and does not interpolate an unlisted tide height or time.

This is a planning aid from predictions, not observed water levels or a safety forecast.

Complete 30-day NOAA sequence

Boston, Massachusetts station 8443970; heights are relative to MLLW, with metres clearly converted from official feet values.

Local time	Turn	Feet	Metres
2026-11-02 04:47	High	9.12 ft	2.778 m
2026-11-02 10:46	Low	1.28 ft	0.390 m
2026-11-02 17:03	High	9.95 ft	3.034 m
2026-11-02 23:29	Low	0.42 ft	0.129 m
2026-11-03 05:53	High	9.25 ft	2.818 m
2026-11-03 11:53	Low	1.23 ft	0.375 m
2026-11-03 18:11	High	9.73 ft	2.966 m
2026-11-04 00:31	Low	0.54 ft	0.163 m
2026-11-04 06:55	High	9.52 ft	2.902 m
2026-11-04 12:59	Low	1.00 ft	0.306 m
2026-11-04 19:18	High	9.64 ft	2.939 m
2026-11-05 01:30	Low	0.58 ft	0.176 m
2026-11-05 07:53	High	9.86 ft	3.005 m
2026-11-05 14:01	Low	0.66 ft	0.201 m
2026-11-05 20:19	High	9.64 ft	2.937 m
2026-11-06 02:24	Low	0.59 ft	0.181 m
2026-11-06 08:44	High	10.17 ft	3.101 m
2026-11-06 14:57	Low	0.30 ft	0.093 m
2026-11-06 21:13	High	9.64 ft	2.938 m
2026-11-07 03:13	Low	0.63 ft	0.193 m
2026-11-07 09:29	High	10.39 ft	3.168 m
2026-11-07 15:46	Low	0.03 ft	0.010 m
2026-11-07 22:00	High	9.59 ft	2.922 m
2026-11-08 03:57	Low	0.73 ft	0.222 m
2026-11-08 10:10	High	10.49 ft	3.196 m
2026-11-08 16:30	Low	-0.10 ft	-0.030 m
2026-11-08 22:44	High	9.46 ft	2.885 m
2026-11-09 04:38	Low	0.88 ft	0.269 m
2026-11-09 10:49	High	10.46 ft	3.190 m
2026-11-09 17:12	Low	-0.09 ft	-0.027 m
2026-11-09 23:26	High	9.28 ft	2.829 m
2026-11-10 05:18	Low	1.08 ft	0.329 m
2026-11-10 11:28	High	10.35 ft	3.155 m
2026-11-10 17:53	Low	0.04 ft	0.012 m
2026-11-11 00:07	High	9.06 ft	2.763 m
2026-11-11 05:58	Low	1.30 ft	0.395 m
2026-11-11 12:07	High	10.18 ft	3.102 m
2026-11-11 18:34	Low	0.25 ft	0.076 m
2026-11-12 00:48	High	8.83 ft	2.692 m
2026-11-12 06:39	Low	1.53 ft	0.466 m
2026-11-12 12:48	High	9.96 ft	3.036 m
2026-11-12 19:15	Low	0.51 ft	0.156 m
2026-11-13 01:30	High	8.60 ft	2.621 m
2026-11-13 07:20	Low	1.77 ft	0.538 m
2026-11-13 13:30	High	9.71 ft	2.960 m
2026-11-13 19:57	Low	0.79 ft	0.242 m
2026-11-14 02:13	High	8.39 ft	2.557 m
2026-11-14 08:04	Low	2.00 ft	0.608 m
2026-11-14 14:14	High	9.45 ft	2.880 m
2026-11-14 20:42	Low	1.06 ft	0.322 m
2026-11-15 02:59	High	8.23 ft	2.509 m
2026-11-15 08:51	Low	2.19 ft	0.667 m
2026-11-15 15:02	High	9.19 ft	2.802 m
2026-11-15 21:30	Low	1.26 ft	0.384 m
2026-11-16 03:48	High	8.17 ft	2.491 m
2026-11-16 09:43	Low	2.29 ft	0.697 m
2026-11-16 15:53	High	8.98 ft	2.738 m
2026-11-16 22:19	Low	1.37 ft	0.419 m
2026-11-17 04:39	High	8.25 ft	2.516 m
2026-11-17 10:37	Low	2.24 ft	0.684 m
2026-11-17 16:46	High	8.86 ft	2.699 m
2026-11-17 23:09	Low	1.39 ft	0.423 m
2026-11-18 05:28	High	8.48 ft	2.585 m
2026-11-18 11:31	Low	2.03 ft	0.618 m
2026-11-18 17:40	High	8.83 ft	2.692 m
2026-11-18 23:58	Low	1.31 ft	0.399 m
2026-11-19 06:16	High	8.85 ft	2.698 m
2026-11-19 12:25	Low	1.64 ft	0.500 m
2026-11-19 18:34	High	8.91 ft	2.715 m
2026-11-20 00:47	Low	1.15 ft	0.352 m
2026-11-20 07:04	High	9.34 ft	2.848 m
2026-11-20 13:18	Low	1.11 ft	0.338 m
2026-11-20 19:27	High	9.08 ft	2.769 m
2026-11-21 01:36	Low	0.93 ft	0.282 m
2026-11-21 07:50	High	9.93 ft	3.025 m
2026-11-21 14:10	Low	0.48 ft	0.145 m
2026-11-21 20:19	High	9.33 ft	2.844 m
2026-11-22 02:24	Low	0.64 ft	0.196 m
2026-11-22 08:36	High	10.54 ft	3.213 m
2026-11-22 15:01	Low	-0.18 ft	-0.055 m
2026-11-22 21:09	High	9.59 ft	2.923 m
2026-11-23 03:12	Low	0.34 ft	0.105 m
2026-11-23 09:22	High	11.11 ft	3.386 m
2026-11-23 15:50	Low	-0.76 ft	-0.233 m
2026-11-23 21:58	High	9.80 ft	2.988 m
2026-11-24 03:59	Low	0.09 ft	0.027 m
2026-11-24 10:09	High	11.55 ft	3.520 m
2026-11-24 16:39	Low	-1.19 ft	-0.361 m
2026-11-24 22:48	High	9.93 ft	3.025 m
2026-11-25 04:48	Low	-0.07 ft	-0.022 m
2026-11-25 10:57	High	11.80 ft	3.597 m
2026-11-25 17:30	Low	-1.40 ft	-0.428 m
2026-11-25 23:40	High	9.95 ft	3.032 m
2026-11-26 05:38	Low	-0.11 ft	-0.035 m
2026-11-26 11:49	High	11.84 ft	3.608 m
2026-11-26 18:21	Low	-1.41 ft	-0.431 m
2026-11-27 00:33	High	9.89 ft	3.014 m
2026-11-27 06:31	Low	-0.03 ft	-0.008 m
2026-11-27 12:43	High	11.67 ft	3.556 m
2026-11-27 19:14	Low	-1.23 ft	-0.376 m
2026-11-28 01:28	High	9.78 ft	2.980 m
2026-11-28 07:26	Low	0.18 ft	0.054 m
2026-11-28 13:39	High	11.31 ft	3.447 m
2026-11-28 20:09	Low	-0.90 ft	-0.274 m
2026-11-29 02:26	High	9.64 ft	2.938 m
2026-11-29 08:23	Low	0.46 ft	0.140 m
2026-11-29 14:38	High	10.81 ft	3.294 m
2026-11-29 21:06	Low	-0.48 ft	-0.146 m
2026-11-30 03:26	High	9.53 ft	2.904 m
2026-11-30 09:25	Low	0.74 ft	0.225 m
2026-11-30 15:41	High	10.25 ft	3.125 m
2026-11-30 22:06	Low	-0.06 ft	-0.017 m
2026-12-01 04:28	High	9.50 ft	2.895 m
2026-12-01 10:30	Low	0.91 ft	0.279 m
2026-12-01 16:47	High	9.75 ft	2.971 m
2026-12-01 23:06	Low	0.32 ft	0.096 m

Primary sources

The exact NOAA prediction response and the official station record make the calculation traceable.

Open the exact NOAA prediction response · Open the NOAA station record