Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Thursday, October 29, 2026
The tide is currently falling in Portsmouth, NH.

Next low tide : in 3h 42m at 7:48 am (0.1 ft)
Next high tide : 2:06 pm (9.5 ft)
Sunset today : 5:39 pm
Sunrise tomorrow : 7:14 am
Moon phase : Waning Gibbous (84% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

Featured Local Businesses

Maritime Boats

Hamilton Marine - Kittery, ME

Safe Harbor Kittery Point

Great Bay Marine

Navtronics

Portsmouth, NH Tides - Dec 1986

< Nov 1986

Print this Tide Chart

Jan 1987 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Mon	10:18	9.8	11:00	8.5	3:59	-0.2	4:41	-1.3	6:54	4:09		1	Mon
2	Tue	11:08	10.0	11:53	8.5	4:49	-0.3	5:32	-1.5	6:55	4:09		2	Tue
3	Wed			12:00	10.0	5:41	-0.3	6:25	-1.4	6:56	4:08		3	Wed
4	Thu	12:46	8.4	12:54	9.8	6:34	-0.2	7:19	-1.2	6:57	4:08		4	Thu
5	Fri	1:42	8.3	1:51	9.5	7:30	0.1	8:16	-0.9	6:58	4:08		5	Fri
6	Sat	2:41	8.1	2:52	9.0	8:29	0.3	9:16	-0.5	6:59	4:08		6	Sat
7	Sun	3:43	7.9	3:57	8.6	9:34	0.6	10:18	-0.2	7:00	4:08		7	Sun
8	Mon	4:46	7.9	5:03	8.1	10:42	0.8	11:19	0.2	7:01	4:08		8	Mon
9	Tue	5:48	7.9	6:09	7.8	11:51	0.8			7:02	4:08		9	Tue
10	Wed	6:47	8.0	7:14	7.5	12:19	0.5	12:58	0.7	7:03	4:08		10	Wed
11	Thu	7:43	8.1	8:14	7.4	1:18	0.7	1:59	0.5	7:04	4:08		11	Thu
12	Fri	8:33	8.2	9:07	7.4	2:12	0.8	2:53	0.3	7:05	4:08		12	Fri
13	Sat	9:18	8.3	9:55	7.4	3:00	0.9	3:40	0.1	7:06	4:08		13	Sat
14	Sun	10:00	8.4	10:39	7.3	3:43	1.0	4:23	0.0	7:06	4:08		14	Sun
15	Mon	10:40	8.4	11:21	7.3	4:23	1.1	5:03	0.0	7:07	4:08		15	Mon
16	Tue	11:18	8.3			5:01	1.1	5:41	0.1	7:08	4:09		16	Tue
17	Wed	12:00	7.2	11:56 AM	8.3	5:38	1.2	6:18	0.1	7:08	4:09		17	Wed
18	Thu	12:37	7.2	12:32	8.2	6:15	1.2	6:54	0.2	7:09	4:09		18	Thu
19	Fri	1:14	7.1	1:09	8.1	6:52	1.3	7:30	0.3	7:10	4:10		19	Fri
20	Sat	1:51	7.0	1:47	8.0	7:31	1.3	8:08	0.4	7:10	4:10		20	Sat
21	Sun	2:30	7.0	2:28	7.8	8:12	1.4	8:48	0.5	7:11	4:10		21	Sun
22	Mon	3:12	7.0	3:13	7.6	8:58	1.4	9:31	0.6	7:11	4:11		22	Mon
23	Tue	3:56	7.2	4:03	7.5	9:48	1.3	10:16	0.6	7:12	4:12		23	Tue
24	Wed	4:42	7.4	4:56	7.4	10:41	1.2	11:04	0.6	7:12	4:12		24	Wed
25	Thu	5:30	7.7	5:53	7.3	11:38	0.9	11:55	0.6	7:12	4:13		25	Thu
26	Fri	6:21	8.1	6:53	7.4			12:37	0.5	7:13	4:13		26	Fri
27	Sat	7:15	8.5	7:55	7.5	12:50	0.6	1:37	0.0	7:13	4:14		27	Sat
28	Sun	8:10	9.0	8:53	7.8	1:47	0.4	2:35	-0.5	7:13	4:15		28	Sun
29	Mon	9:04	9.4	9:49	8.0	2:43	0.2	3:30	-1.0	7:14	4:16		29	Mon
30	Tue	9:59	9.7	10:44	8.2	3:37	-0.1	4:24	-1.3	7:14	4:16		30	Tue
31	Wed	10:53	9.9	11:40	8.3	4:31	-0.3	5:19	-1.5	7:14	4:17		31	Wed
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (8423745)

www.USHarbors.com

The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
Any commercial use, modification, redistribution, or repackaging without written permission is strictly prohibited.

Is this week a spring tide or neap tide in Portsmouth, NH?

Portsmouth, NH is currently in a spring phase. Tonight's moon is 84% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are near their weekly maximum.

What datum are Portsmouth, NH tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Portsmouth, NH?

Tide predictions for Portsmouth, NH come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Portsmouth, NH?

Tide data for Portsmouth, NH is sourced from NOAA Station #8423745. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8423745.

What is the moon phase in Portsmouth, NH tonight?

Tonight the moon over Portsmouth, NH is Waning Gibbous (84% illuminated). This places Portsmouth, NH in a spring tide cycle, so tidal ranges are near their weekly maximum this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA

Quietly Sophisticated: The Hood 42 LM

By US Harbors At first glance, the Hood 42 LM might be confused for a boat that worked the Maine coast fifty years ago, but upon further inspection, the fifteen coats of Epifanes varnish over mahogany and custom-cast bronze hardware reveal that this boat was built for cruising. Beyond the… Learn More

Coastal Stories See All

Stray Current vs. Galvanic Corrosion: What Every Boat Owner Needs to Know

By Captain Ken Kreisler, Best4Boats.com. If you keep a boat in a marina — or… More

Boating

Restored oyster reefs are monitored to ensure the oysters that grow there are thriving. Photo: Oyster Recovery Partnership.

Celebrating Oysters During Oyster Week

By fisheries.noaa.gov, fisheries.noaa.gov. Oysters are great multitaskers! They provide many benefits to the ecosystem they… More

Marine Economy Ocean Science

A snow-Tanner hybrid crab collected during the 2026 eastern Bering Sea bottom trawl survey. Hybrid crab exhibit intermediate morphological traits—such as a curved mouth—relative to snow and Tanner crab parent species. Credit: NOAA Fisheries / Leah Zacher

Marine Heatwave Triggered a Hybrid Crab Surge in the Bering Sea

By fisheries.noaa.gov, fisheries.noaa.gov. A team of scientists at the Alaska Fisheries Science Center’s Kodiak Laboratory… More

Ocean Science

A car drives through a snowstorm in Broomfield, Colorado, in 2024. (Image credit: Bob Hyatt/NOAA)

El Nino looms large over U.S. Winter Outlook

By noaa.gov, noaa.gov. NOAA’s U.S. Winter Outlook, released today, shows how El Nino will likely influence the… More

Coastal News Weather & Tides

Archival photo of New England swordfishing vessel (left) courtesy of NOAA Fisheries; Background photo and photo offloading fish (right) courtesy of Hawaii Longline Association/Eric Kingma

Highly Migratory Species Management: Managing Shared Resources at Home and Around the World

By fisheries.noaa.gov, fisheries.noaa.gov. Highly migratory species—like Atlantic yellowfin tuna, Pacific albacore, and Atlantic swordfish—travel thousands of miles across… More

Coastal News Ocean Science