Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Sunday, October 11, 2026
The tide is currently falling in Portsmouth, NH.

Next low tide : in 3h 38m at 6:41 pm (-0.4 ft)
Next high tide (tomorrow) : 1:00 am (8.3 ft)
Sunset today : 6:07 pm
Sunrise tomorrow : 6:52 am
Moon phase : New Moon (1% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

Featured Local Businesses

Maritime Boats

Safe Harbor Kittery Point

Hamilton Marine - Kittery, ME

Great Bay Marine

Navtronics

Portsmouth, NH Tides - Jan 1859

< Dec 1858

Print this Tide Chart

Feb 1859 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Sat	9:19	8.2	10:00	7.1	3:00	1.1	3:45	0.1	7:18	4:22		1	Sat
2	Sun	10:03	8.3	10:44	7.2	3:45	1.1	4:29	0.1	7:18	4:23		2	Sun
3	Mon	10:45	8.3	11:25	7.2	4:27	1.1	5:09	0.0	7:19	4:24		3	Mon
4	Tue	11:24	8.3			5:06	1.0	5:45	0.0	7:18	4:25		4	Tue
5	Wed	12:02	7.2	12:01	8.3	5:43	1.0	6:20	0.1	7:18	4:26		5	Wed
6	Thu	12:38	7.3	12:36	8.2	6:19	1.0	6:53	0.1	7:18	4:27		6	Thu
7	Fri	1:12	7.3	1:11	8.1	6:55	1.0	7:26	0.2	7:18	4:28		7	Fri
8	Sat	1:46	7.3	1:47	7.9	7:33	1.0	8:00	0.3	7:18	4:29		8	Sat
9	Sun	2:21	7.4	2:27	7.7	8:13	1.0	8:37	0.4	7:18	4:30		9	Sun
10	Mon	2:59	7.5	3:10	7.5	8:58	1.0	9:18	0.6	7:18	4:31		10	Mon
11	Tue	3:40	7.6	3:59	7.2	9:46	0.9	10:03	0.7	7:17	4:32		11	Tue
12	Wed	4:26	7.7	4:53	7.0	10:39	0.8	10:52	0.9	7:17	4:33		12	Wed
13	Thu	5:17	7.9	5:52	6.9	11:37	0.7	11:47	0.9	7:16	4:34		13	Thu
14	Fri	6:13	8.1	6:58	6.9			12:40	0.4	7:16	4:36		14	Fri
15	Sat	7:15	8.4	8:04	7.1	12:48	0.9	1:45	0.1	7:16	4:37		15	Sat
16	Sun	8:17	8.8	9:05	7.5	1:51	0.7	2:46	-0.4	7:15	4:38		16	Sun
17	Mon	9:16	9.3	10:02	7.9	2:52	0.3	3:44	-0.9	7:15	4:39		17	Mon
18	Tue	10:14	9.6	10:58	8.2	3:49	-0.1	4:38	-1.3	7:14	4:40		18	Tue
19	Wed	11:09	9.9	11:51	8.6	4:45	-0.4	5:31	-1.5	7:13	4:42		19	Wed
20	Thu			12:03	9.9	5:41	-0.7	6:21	-1.6	7:13	4:43		20	Thu
21	Fri	12:42	8.8	12:56	9.7	6:35	-0.8	7:11	-1.4	7:12	4:44		21	Fri
22	Sat	1:32	8.9	1:49	9.3	7:29	-0.7	8:00	-1.1	7:11	4:45		22	Sat
23	Sun	2:23	8.8	2:43	8.8	8:24	-0.5	8:51	-0.6	7:11	4:47		23	Sun
24	Mon	3:15	8.6	3:41	8.1	9:22	-0.2	9:43	0.0	7:10	4:48		24	Mon
25	Tue	4:09	8.4	4:41	7.5	10:22	0.1	10:38	0.6	7:09	4:49		25	Tue
26	Wed	5:05	8.1	5:43	7.0	11:24	0.4	11:35	1.0	7:08	4:51		26	Wed
27	Thu	6:03	7.8	6:48	6.7			12:29	0.6	7:07	4:52		27	Thu
28	Fri	7:03	7.7	7:51	6.6	12:37	1.4	1:34	0.7	7:06	4:53		28	Fri
29	Sat	8:02	7.7	8:48	6.7	1:40	1.5	2:33	0.6	7:05	4:55		29	Sat
30	Sun	8:55	7.8	9:37	6.8	2:35	1.4	3:23	0.5	7:04	4:56		30	Sun
31	Mon	9:42	8.0	10:21	7.0	3:24	1.2	4:07	0.3	7:03	4:57		31	Mon
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 1% 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 New Moon (1% 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

Kelvin Waves, Explained

By fisheries.noaa.gov, fisheries.noaa.gov. You may be hearing a lot about Kelvin waves in the news.… More

Coastal News Extreme Weather Ocean Science

Southern Resident killer whales swim just off Seattle’s shore. NOAA experts anticipate that the West Coast and the Pacific Islands will feel the effects of the 2026–2027 El Niño event most directly. Credit: NOAA Northwest Fisheries Science Center; taken under NOAA permit #781-1824

How Will El Niño Affect Your Local Fisheries?

By fisheries.noaa.gov, fisheries.noaa.gov. What does El Niño mean for U.S. fisheries and marine life? What… More

Coastal News Extreme Weather Ocean Science

NOAA's flood inundation map (left) depicting the forecast for flooding extent in New London, Wisconsin, and a photo of flooded streets in New London (right), dated April 17, 2026. (Image credit: NOAA NWS)

NOAA’s flood mapping tool now covers nearly 100% of U.S.

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA’s National Weather Service announced today that Flood Inundation Mapping (FIM), a… More

Coastal News Extreme Weather Weather & Tides

Meet Hawaii Fish Company, Tilapia Farmers in Hawaiʻi

By fisheries.noaa.gov, fisheries.noaa.gov. For husband and wife duo Ron and and Estralita Weidenbach, fish farming… More

Coastal Life Marine Economy

NOAA Fisheries and Sea Quester Farms partnered up to evaluate if kelp farms provide habitat for marine life in Alaska. Pictured here is one of Sea Quester’s farms in southeast Alaska near Juneau. Credit: Hatch Blue, Alaska Mariculture Cluster

Kelp Farms and Marine Life Co-Exist in Southeast Alaska

By fisheries.noaa.gov, fisheries.noaa.gov. Marine aquaculture, or mariculture, provides economic opportunities for coastal communities in Alaska… More

Coastal Life Environment Food Ocean Science