Nearby Harbors
43.0783’ N, 70.7517’ W

Portsmouth, NH

67°
H 81°
L 59°
SW
3mph
High tide
9:49 am
Photo Credits

Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Monday, August 24, 2026
The tide is currently rising in Portsmouth, NH.
Next low tide : 3:34 pm (1.6 ft)
Next high tide : in 2h 41m at 9:49 am (6.7 ft)
Sunset today : 7:31 pm
Sunrise tomorrow : 5:58 am
Moon phase : Waxing Gibbous (88% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

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Portsmouth, NH Tides - Apr 1950

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:528.910:178.93:32-0.13:59-0.65:256:08Full Moon1Sat
2Sun10:419.111:029.44:21-0.84:44-0.95:236:09Full Moon2Sun
3Mon11:309.311:479.85:10-1.35:29-0.95:216:10Full Moon3Mon
4Tue12:199.25:59-1.56:15-0.85:206:12Waning Gibbous4Tue
5Wed12:339.91:108.96:49-1.67:03-0.65:186:13Waning Gibbous5Wed
6Thu1:229.82:038.57:41-1.37:55-0.15:166:14Waning Gibbous6Thu
7Fri2:149.43:018.08:37-0.98:510.45:146:15Waning Gibbous7Fri
8Sat3:128.94:067.69:39-0.49:530.85:136:16Third Quarter8Sat
9Sun4:188.45:147.310:460.111:021.25:116:17Third Quarter9Sun
10Mon5:288.16:247.111:570.45:096:19Third Quarter10Mon
11Tue6:407.97:317.312:151.31:060.55:086:20Waning Crescent11Tue
12Wed7:477.88:297.51:271.22:080.55:066:21Waning Crescent12Wed
13Thu8:457.99:187.82:280.92:590.45:046:22Waning Crescent13Thu
14Fri9:368.010:008.03:200.63:430.45:036:23Waning Crescent14Fri
15Sat10:208.010:388.24:050.44:220.45:016:24New Moon15Sat
16Sun11:017.911:138.34:460.24:570.54:596:25New Moon16Sun
17Mon11:397.811:468.45:240.15:300.74:586:27New Moon17Mon
18Tue12:167.75:590.16:020.94:566:28New Moon18Tue
19Wed12:188.312:517.56:330.16:351.14:546:29Waxing Crescent19Wed
20Thu12:508.21:277.37:070.27:091.34:536:30Waxing Crescent20Thu
21Fri1:248.12:057.17:440.47:471.54:516:31Waxing Crescent21Fri
22Sat2:027.92:476.88:250.68:291.64:506:32Waxing Crescent22Sat
23Sun2:457.73:346.79:100.89:161.84:486:34First Quarter23Sun
24Mon3:347.64:266.610:010.910:101.84:476:35First Quarter24Mon
25Tue4:297.65:226.710:550.911:081.74:456:36First Quarter25Tue
26Wed5:297.66:197.011:520.84:446:37First Quarter26Wed
27Thu6:307.87:157.512:101.412:490.64:426:38Waxing Gibbous27Thu
28Fri7:328.08:078.11:120.91:440.24:416:39Waxing Gibbous28Fri
29Sat8:298.48:568.82:110.32:35-0.14:396:41Waxing Gibbous29Sat
30Sun10:248.710:449.44:06-0.44:24-0.45:387:42Full Moon30Sun
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 88% 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 Gibbous (88% 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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