Tide is currently rising — next high in 40m

Next high tide at Boston, MA: 20:31 GMT-4, 2.85 m / 9.3ft

Heights relative to MLLW. 2026-04-26.

Coef. 87

Tide times at Boston, MA on Sunday, 26 April 2026: first low tide at 01:27am, first high tide at 07:48am, second low tide at 02:07pm, second high tide at 08:31pm. Sunrise 05:46am, sunset 07:38pm.

Tide curve — next 24 hours

Predictions: NOAA CO-OPS station 8443970 — heights relative to MLLW.

Harmonic prediction from the official tide authority. Very high accuracy under normal conditions; storm surge may shift actual water level. Not for navigation.

7-day tide table

Day	Type	Time	Height	Coef.
Sun 26 Apr	High	20:31	2.8m / 9.3ft	87
Mon 27 Apr	Low	02:33	0.3m / 1.1ft	89
	High	08:54	2.9m / 9.5ft
	Low	15:04	0.2m / 0.7ft
	High	21:26	2.9m / 9.7ft
Tue 28 Apr	Low	03:33	0.2m / 0.7ft	91
	High	09:51	2.9m / 9.5ft
	Low	15:55	0.2m / 0.7ft
	High	22:13	3.0m / 10.0ft
Wed 29 Apr	Low	04:25	0.1m / 0.4ft	97
	High	10:40	2.9m / 9.5ft
	Low	16:40	0.2m / 0.8ft
	High	22:55	3.1m / 10.2ft
Thu 30 Apr	Low	05:10	0.0m / 0.2ft	100
	High	11:24	2.9m / 9.5ft
	Low	17:20	0.3m / 0.9ft
	High	23:33	3.1m / 10.2ft
Fri 01 May	Low	05:51	0.0m / 0.0ft	93
	High	12:05	2.9m / 9.4ft
	Low	17:59	0.3m / 1.0ft
Sat 02 May	High	00:09	3.1m / 10.3ft	101
	Low	06:30	0.0m / 0.0ft
	High	12:45	2.8m / 9.2ft
	Low	18:37	0.4m / 1.2ft

Predictions: NOAA CO-OPS station 8443970 — heights relative to MLLW. · Not for navigation.

Sun & moon today

Sunrise: 05:46
Sunset: 19:38
Moonrise: 14:41
Moonset: 03:27
Moon phase: Waxing gibbous (75% illuminated)

Current conditions

Conditions data not available for this station. Wind, swell and water temperature ride along with Open-Meteo Marine; gauge-only stations like the UK EA Flood network publish water level only.

Solunar 7-day rating

The angler tradition that rates each day for fish-bite likelihood using moon transits and rise/set. One to five stars. Not a scientific forecast.

Sun
★★★★★
Mon
★★★★★
Tue
★★★★★
Wed
★★★★★
Thu
★★★★★
Fri
★★★★★
Sat
★★★★★

Best windows Sun 26 Apr

Suggested time slots at Boston, MA, derived from the tide, sun, moon, and conditions data on this page. Rough guidance, not a forecast.

Spring & neap tides at Boston, MA

Next spring tide on Thu 30 Apr (range 3.1m / 10.2ft). Next neap on Sun 26 Apr.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

About tides at Boston, MA

Boston has one of the larger tide ranges on the US East Coast — mean range about 2.9 metres, climbing past 3.4 metres on spring tides. The Atlantic comes in through Massachusetts Bay and Boston Harbor's geometry amplifies it. The pattern is semidiurnal: two highs and two lows roughly equal in size, a fresh cycle every twelve hours and twenty-five minutes. For anyone walking the HarborWalk, sea-kayaking from Spectacle Island, or watching the harbour seals at low water, the size of the swing changes the day. Tide flats off Wollaston and Squantum open up at low water and re-cover quickly on the flood. The Charles River dam at the head of the harbour decouples the river from the ocean tide, but everything seaward of it cycles fully. Predictions come from NOAA CO-OPS station 8443970 in the Inner Harbor. Nor'easters can stack water above predicted levels by 30 cm or more, especially when the storm coincides with spring tide and onshore wind.

Common questions about tides at Boston, MA

When is the next high tide at Boston?

The hero block shows the next high tide at Boston Inner Harbor in local Eastern time. The 7-day table below covers all four daily extremes — two highs and two lows — for the next week. For coastal-flood threats during nor'easters, the National Weather Service Boston office is the authoritative source.

Why is the tide range so big at Boston?

Massachusetts Bay funnels the open-Atlantic tide into a smaller area, raising the height of each cycle. The further north you go along the New England coast, the bigger the range becomes, peaking at the head of the Bay of Fundy. Boston's mean range is about 2.9 m — roughly twice the swing at New York Harbor and four times what San Diego sees.

When are the best low tides for clamming in Boston Harbor?

The biggest low tides — well below MLLW reference — cluster around new and full moons. The flats off Quincy, Hull, and the Boston Harbor Islands open up most fully on the lowest spring tides, especially in summer. The 7-day table on this page flags each day's lowest predicted tide; pair that with sunrise time on the sun/moon block above.

Where do these tide predictions come from?

NOAA CO-OPS station 8443970, Boston Inner Harbor. NOAA's harmonic predictions for Boston are calibrated against decades of gauge data and produce times accurate to a few minutes and heights to a few centimetres under normal weather. Storm surge during nor'easters can add 30 cm or more above predicted height.

Is this safe to use for navigation?

No. Use NOAA's authoritative chart products, official tide tables, and USCG notices for piloting. Boston Harbor traffic, the dredged main channel, and the strong currents through the President Roads area need real navigational sources, not a planning tool.

30-day tide table — Boston, MA

Heights relative to MLLW. Predictions: NOAA CO-OPS station 8443970 — heights relative to MLLW.

Day	Type	Time	Height
Sun 26 Apr	Low	01:27	0.4m / 1.3ft
	High	07:48	2.9m / 9.5ft
	Low	14:07	0.2m / 0.7ft
	High	20:31	2.8m / 9.3ft
Mon 27 Apr	Low	02:33	0.3m / 1.1ft
	High	08:54	2.9m / 9.5ft
	Low	15:04	0.2m / 0.7ft
	High	21:26	2.9m / 9.7ft
Tue 28 Apr	Low	03:33	0.2m / 0.7ft
	High	09:51	2.9m / 9.5ft
	Low	15:55	0.2m / 0.7ft
	High	22:13	3.0m / 10.0ft
Wed 29 Apr	Low	04:25	0.1m / 0.4ft
	High	10:40	2.9m / 9.5ft
	Low	16:40	0.2m / 0.8ft
	High	22:55	3.1m / 10.2ft
Thu 30 Apr	Low	05:10	0.0m / 0.2ft
	High	11:24	2.9m / 9.5ft
	Low	17:20	0.3m / 0.9ft
	High	23:33	3.1m / 10.2ft
Fri 01 May	Low	05:51	0.0m / 0.0ft
	High	12:05	2.9m / 9.4ft
	Low	17:59	0.3m / 1.0ft
Sat 02 May	High	00:09	3.1m / 10.3ft
	Low	06:30	0.0m / 0.0ft
	High	12:45	2.8m / 9.2ft
	Low	18:37	0.4m / 1.2ft
Sun 03 May	High	00:46	3.1m / 10.2ft
	Low	07:09	0.0m / 0.1ft
	High	13:24	2.8m / 9.1ft
	Low	19:16	0.4m / 1.4ft
Mon 04 May	High	01:24	3.1m / 10.1ft
	Low	07:49	0.1m / 0.3ft
	High	14:03	2.7m / 8.9ft
	Low	19:55	0.5m / 1.6ft
Tue 05 May	High	02:04	3.0m / 9.9ft
	Low	08:29	0.2m / 0.6ft
	High	14:44	2.6m / 8.6ft
	Low	20:36	0.5m / 1.8ft
Wed 06 May	High	02:45	2.9m / 9.7ft
	Low	09:11	0.3m / 0.8ft
	High	15:27	2.6m / 8.4ft
	Low	21:19	0.6m / 2.0ft
Thu 07 May	High	03:28	2.9m / 9.4ft
	Low	09:56	0.3m / 1.1ft
	High	16:12	2.5m / 8.3ft
	Low	22:06	0.7m / 2.2ft
Fri 08 May	High	04:16	2.8m / 9.2ft
	Low	10:44	0.4m / 1.3ft
	High	17:01	2.5m / 8.2ft
	Low	22:57	0.7m / 2.3ft
Sat 09 May	High	05:07	2.8m / 9.1ft
	Low	11:34	0.4m / 1.3ft
	High	17:52	2.5m / 8.3ft
	Low	23:52	0.7m / 2.2ft
Sun 10 May	High	06:01	2.8m / 9.0ft
	Low	12:25	0.4m / 1.3ft
	High	18:42	2.6m / 8.6ft
Mon 11 May	Low	00:46	0.6m / 1.9ft
	High	06:56	2.8m / 9.1ft
	Low	13:15	0.4m / 1.2ft
	High	19:32	2.8m / 9.0ft
Tue 12 May	Low	01:42	0.4m / 1.5ft
	High	07:51	2.8m / 9.2ft
	Low	14:06	0.3m / 1.0ft
	High	20:21	2.9m / 9.6ft
Wed 13 May	Low	02:37	0.3m / 0.8ft
	High	08:46	2.9m / 9.5ft
	Low	14:56	0.2m / 0.7ft
	High	21:09	3.1m / 10.2ft
Thu 14 May	Low	03:30	0.0m / 0.2ft
	High	09:39	3.0m / 9.7ft
	Low	15:46	0.1m / 0.4ft
	High	21:57	3.3m / 10.9ft
Fri 15 May	Low	04:22	-0.2m / -0.5ft
	High	10:31	3.0m / 10.0ft
	Low	16:35	0.0m / 0.1ft
	High	22:45	3.5m / 11.5ft
Sat 16 May	Low	05:13	-0.3m / -1.1ft
	High	11:22	3.1m / 10.2ft
	Low	17:24	-0.0m / -0.1ft
	High	23:33	3.6m / 11.8ft
Sun 17 May	Low	06:04	-0.4m / -1.4ft
	High	12:14	3.1m / 10.2ft
	Low	18:15	-0.0m / -0.1ft
Mon 18 May	High	00:24	3.6m / 12.0ft
	Low	06:56	-0.5m / -1.5ft
	High	13:08	3.1m / 10.2ft
	Low	19:07	-0.0m / -0.0ft
Tue 19 May	High	01:18	3.6m / 11.9ft
	Low	07:49	-0.4m / -1.4ft
	High	14:04	3.1m / 10.1ft
	Low	20:00	0.0m / 0.1ft
Wed 20 May	High	02:13	3.5m / 11.6ft
	Low	08:43	-0.3m / -1.1ft
	High	15:00	3.0m / 9.9ft
	Low	20:56	0.1m / 0.4ft
Thu 21 May	High	03:11	3.4m / 11.2ft
	Low	09:40	-0.2m / -0.6ft
	High	15:59	2.9m / 9.7ft
	Low	21:56	0.2m / 0.8ft
Fri 22 May	High	04:12	3.2m / 10.6ft
	Low	10:39	-0.0m / -0.1ft
	High	17:01	2.9m / 9.5ft
	Low	22:59	0.3m / 1.1ft
Sat 23 May	High	05:16	3.1m / 10.1ft
	Low	11:39	0.1m / 0.3ft
	High	18:03	2.9m / 9.5ft
Sun 24 May	Low	00:04	0.4m / 1.2ft
	High	06:21	2.9m / 9.7ft
	Low	12:39	0.2m / 0.6ft
	High	19:03	2.9m / 9.6ft
Mon 25 May	Low	01:09	0.4m / 1.2ft
	High	07:26	2.8m / 9.3ft
	Low	13:36	0.3m / 0.9ft
	High	20:00	3.0m / 9.7ft

Not for navigation. Generated 2026-04-26T23:50:59.774Z.

Read about how these predictions are made on the methodology page. Unfamiliar with terms like spring tide or datum? See the glossary.

Not for navigation. Page generated 2026-04-26T23:50:59.774Z. Predictions refresh daily.