Nearby Harbors
43.0783’ N, 70.7517’ W

Portsmouth, NH

45°
H 59°
L 42°
WSW
5mph
High tide
11:04 am
Photo Credits

Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Monday, November 9, 2026
The tide is currently rising in Portsmouth, NH.
Next low tide : 5:23 pm (-0.3 ft)
Next high tide : in 6h 09m at 11:04 am (8.8 ft)
Sunset today : 4:25 pm
Sunrise tomorrow : 6:28 am
Moon phase : New Moon (0% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

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Portsmouth, NH Tides - Apr 1803

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri7:077.67:537.012:451.51:330.85:306:12Waxing Gibbous1Fri
2Sat8:097.68:467.21:501.42:290.75:286:13Waxing Gibbous2Sat
3Sun9:017.79:307.52:451.13:150.65:266:14Waxing Gibbous3Sun
4Mon9:467.810:097.83:320.83:540.55:246:15Waxing Gibbous4Mon
5Tue10:277.810:458.04:130.54:290.55:236:16Full Moon5Tue
6Wed11:067.811:188.24:500.35:020.65:216:17Full Moon6Wed
7Thu11:427.811:498.25:250.25:330.65:196:19Full Moon7Thu
8Fri12:177.75:580.16:040.85:176:20Full Moon8Fri
9Sat12:198.312:517.56:320.16:360.95:166:21Waning Gibbous9Sat
10Sun12:518.21:267.37:060.27:111.05:146:22Waning Gibbous10Sun
11Mon1:258.22:047.17:440.37:501.25:126:23Waning Gibbous11Mon
12Tue2:048.12:477.08:270.48:341.35:116:24Waning Gibbous12Tue
13Wed2:508.03:376.89:160.59:251.45:096:25Third Quarter13Wed
14Thu3:437.94:346.810:110.610:231.45:076:27Third Quarter14Thu
15Fri4:437.95:357.011:100.611:261.35:056:28Third Quarter15Fri
16Sat5:488.06:387.312:120.45:046:29Third Quarter16Sat
17Sun6:558.27:397.912:330.91:140.25:026:30Waning Crescent17Sun
18Mon7:598.58:348.61:390.42:11-0.25:016:31Waning Crescent18Mon
19Tue8:588.89:259.22:39-0.33:04-0.54:596:32Waning Crescent19Tue
20Wed9:539.010:149.73:34-0.93:54-0.74:576:34New Moon20Wed
21Thu10:479.111:0210.04:27-1.34:43-0.74:566:35New Moon21Thu
22Fri11:409.111:5110.05:19-1.65:32-0.64:546:36New Moon22Fri
23Sat12:328.86:10-1.66:22-0.34:536:37Waxing Crescent23Sat
24Sun12:419.81:238.57:02-1.37:120.04:516:38Waxing Crescent24Sun
25Mon1:319.42:178.17:54-0.98:040.54:506:39Waxing Crescent25Mon
26Tue2:258.93:157.78:50-0.49:010.94:486:40Waxing Crescent26Tue
27Wed3:238.44:157.39:500.110:031.34:476:42First Quarter27Wed
28Thu4:258.05:177.110:510.611:071.54:456:43First Quarter28Thu
29Fri5:287.66:177.111:520.84:446:44First Quarter29Fri
30Sat6:317.47:147.212:131.612:511.04:426:45First Quarter30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8423745)

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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 0% 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 (0% 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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