Nearby Harbors
43.0783’ N, 70.7517’ W

Portsmouth, NH

71°
H 72°
L 47°
NW
17mph
High tide
2:20 pm
Photo Credits

Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Monday, September 14, 2026
The tide is currently rising in Portsmouth, NH.
Next low tide : 8:31 pm (-0.1 ft)
Next high tide : in 1h 21m at 2:20 pm (8.7 ft)
Sunset today : 6:55 pm
Sunrise tomorrow : 6:21 am
Moon phase : Waxing Crescent (14% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

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Portsmouth, NH Tides - Nov 1908

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun4:167.44:288.410:071.010:530.26:174:35First Quarter1Sun
2Mon5:207.55:358.311:131.011:570.16:184:34First Quarter2Mon
3Tue6:267.86:448.412:210.76:204:33Waxing Gibbous3Tue
4Wed7:298.27:508.61:020.01:290.36:214:31Waxing Gibbous4Wed
5Thu8:268.78:508.82:02-0.22:31-0.26:224:30Waxing Gibbous5Thu
6Fri9:189.19:459.02:56-0.43:27-0.76:244:29Full Moon6Fri
7Sat10:079.510:389.03:47-0.54:19-1.06:254:28Full Moon7Sat
8Sun10:549.611:288.94:35-0.55:08-1.16:264:27Full Moon8Sun
9Mon11:409.65:21-0.35:57-1.16:274:26Full Moon9Mon
10Tue12:178.612:269.46:080.06:44-0.96:294:24Waning Gibbous10Tue
11Wed1:058.31:119.06:530.37:31-0.56:304:23Waning Gibbous11Wed
12Thu1:537.91:588.67:400.78:20-0.16:314:22Waning Gibbous12Thu
13Fri2:447.62:488.28:301.19:120.36:334:21Waning Gibbous13Fri
14Sat3:387.23:437.89:231.510:070.76:344:20Third Quarter14Sat
15Sun4:337.14:407.510:201.711:020.96:354:19Third Quarter15Sun
16Mon5:297.05:387.311:191.711:571.16:364:18Third Quarter16Mon
17Tue6:237.16:367.312:191.76:384:18Third Quarter17Tue
18Wed7:157.37:317.312:511.11:171.56:394:17Waning Crescent18Wed
19Thu8:027.68:217.41:401.02:081.16:404:16Waning Crescent19Thu
20Fri8:447.99:077.62:230.92:520.76:414:15Waning Crescent20Fri
21Sat9:238.29:497.73:030.73:330.46:434:14Waning Crescent21Sat
22Sun9:598.510:297.83:400.64:110.06:444:14New Moon22Sun
23Mon10:368.711:097.94:170.54:50-0.36:454:13New Moon23Mon
24Tue11:139.011:508.04:560.45:30-0.56:464:12New Moon24Tue
25Wed11:539.15:360.46:13-0.66:474:12New Moon25Wed
26Thu12:338.012:369.16:200.46:57-0.66:494:11Waxing Crescent26Thu
27Fri1:187.91:229.17:060.47:46-0.66:504:11Waxing Crescent27Fri
28Sat2:077.82:148.97:570.58:39-0.46:514:10Waxing Crescent28Sat
29Sun3:037.83:128.78:530.69:36-0.36:524:10First Quarter29Sun
30Mon4:037.84:168.59:550.710:37-0.16:534:09First Quarter30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8423745)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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Common Questions About Portsmouth, NH Tides

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

Portsmouth, NH is currently in a spring phase. Tonight's moon is 14% 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 Waxing Crescent (14% 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

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