Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Friday, October 9, 2026
The tide is currently rising in Portsmouth, NH.

Next low tide (tomorrow) : 5:31 am (-0.1 ft)
Next high tide : in 5h 24m at 11:30 pm (8.7 ft)
Sunset today : 6:10 pm
Sunrise tomorrow : 6:49 am
Moon phase : New Moon (1% 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 - Jul 1863

< Jun 1863

Print this Tide Chart

Aug 1863 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Wed	11:01	8.5	11:12	10.1	4:41	-1.2	4:50	-0.3	4:10	7:30		1	Wed
2	Thu	11:56	8.8			5:34	-1.4	5:46	-0.5	4:11	7:29		2	Thu
3	Fri	12:08	10.2	12:50	9.0	6:27	-1.5	6:41	-0.5	4:11	7:29		3	Fri
4	Sat	1:03	10.0	1:43	9.1	7:20	-1.4	7:38	-0.5	4:12	7:29		4	Sat
5	Sun	1:58	9.7	2:38	9.0	8:12	-1.1	8:36	-0.3	4:13	7:29		5	Sun
6	Mon	2:56	9.2	3:34	9.0	9:07	-0.7	9:37	-0.1	4:13	7:29		6	Mon
7	Tue	3:56	8.6	4:31	8.8	10:03	-0.3	10:40	0.2	4:14	7:28		7	Tue
8	Wed	4:57	8.1	5:28	8.7	10:59	0.2	11:43	0.4	4:15	7:28		8	Wed
9	Thu	5:59	7.7	6:26	8.5	11:57	0.6			4:15	7:27		9	Thu
10	Fri	7:02	7.4	7:24	8.4	12:47	0.5	12:57	0.9	4:16	7:27		10	Fri
11	Sat	8:03	7.3	8:18	8.4	1:49	0.5	1:54	1.1	4:17	7:26		11	Sat
12	Sun	8:58	7.2	9:08	8.4	2:44	0.4	2:47	1.2	4:18	7:26		12	Sun
13	Mon	9:47	7.3	9:54	8.4	3:33	0.3	3:34	1.1	4:18	7:25		13	Mon
14	Tue	10:32	7.4	10:37	8.5	4:18	0.3	4:17	1.1	4:19	7:25		14	Tue
15	Wed	11:14	7.4	11:16	8.5	4:58	0.2	4:57	1.0	4:20	7:24		15	Wed
16	Thu	11:52	7.5	11:54	8.5	5:36	0.2	5:35	1.0	4:21	7:24		16	Thu
17	Fri			12:28	7.6	6:10	0.2	6:12	1.0	4:22	7:23		17	Fri
18	Sat	12:30	8.4	1:03	7.7	6:43	0.2	6:49	0.9	4:23	7:22		18	Sat
19	Sun	1:05	8.3	1:37	7.8	7:16	0.2	7:26	0.9	4:24	7:21		19	Sun
20	Mon	1:41	8.1	2:12	7.8	7:50	0.3	8:06	0.9	4:24	7:21		20	Mon
21	Tue	2:20	8.0	2:49	7.9	8:27	0.4	8:49	0.9	4:25	7:20		21	Tue
22	Wed	3:02	7.8	3:30	8.1	9:08	0.5	9:37	0.8	4:26	7:19		22	Wed
23	Thu	3:49	7.6	4:16	8.2	9:52	0.6	10:28	0.7	4:27	7:18		23	Thu
24	Fri	4:41	7.4	5:06	8.4	10:42	0.7	11:24	0.6	4:28	7:17		24	Fri
25	Sat	5:38	7.3	6:02	8.6	11:36	0.7			4:29	7:16		25	Sat
26	Sun	6:41	7.3	7:02	8.8	12:25	0.4	12:35	0.7	4:30	7:15		26	Sun
27	Mon	7:46	7.5	8:04	9.2	1:29	0.1	1:38	0.5	4:31	7:14		27	Mon
28	Tue	8:48	7.9	9:04	9.6	2:30	-0.3	2:39	0.1	4:32	7:13		28	Tue
29	Wed	9:46	8.3	10:02	9.9	3:28	-0.8	3:38	-0.2	4:33	7:12		29	Wed
30	Thu	10:42	8.7	10:58	10.1	4:23	-1.1	4:34	-0.6	4:34	7:11		30	Thu
31	Fri	11:37	9.0	11:53	10.1	5:16	-1.4	5:30	-0.8	4:35	7:10		31	Fri
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

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