Nearby Harbors
43.0783’ N, 70.7517’ W

Portsmouth, NH

63°
H -°
L 47°
WSW
5mph
Low tide
11:40 pm
Photo Credits

Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Monday, November 2, 2026
The tide is currently falling in Portsmouth, NH.
Next low tide : in 6h 12m at 11:40 pm (0.2 ft)
Next high tide (tomorrow) : 6:08 am (7.7 ft)
Sunset today : 4:33 pm
Sunrise tomorrow : 6:19 am
Moon phase : Third Quarter (41% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

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Portsmouth, NH Tides - Nov 2026

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun3:547.64:088.69:430.810:340.06:174:35Third Quarter1Sun
2Mon5:027.65:188.310:531.011:400.26:194:33Third Quarter2Mon
3Tue6:087.76:278.212:040.96:204:32Waning Crescent3Tue
4Wed7:118.07:348.112:450.31:140.76:214:31Waning Crescent4Wed
5Thu8:078.38:338.11:440.32:150.36:234:30Waning Crescent5Thu
6Fri8:578.59:268.12:370.33:090.06:244:28Waning Crescent6Fri
7Sat9:438.710:148.13:240.33:57-0.26:254:27New Moon7Sat
8Sun10:248.810:597.94:070.54:41-0.36:264:26New Moon8Sun
9Mon11:048.811:417.84:480.65:23-0.36:284:25New Moon9Mon
10Tue11:428.65:260.86:02-0.16:294:24New Moon10Tue
11Wed12:227.612:208.56:041.06:410.16:304:23Waxing Crescent11Wed
12Thu1:017.412:588.26:421.27:200.36:324:22Waxing Crescent12Thu
13Fri1:417.21:388.07:221.48:010.66:334:21Waxing Crescent13Fri
14Sat2:246.92:217.88:041.68:450.86:344:20Waxing Crescent14Sat
15Sun3:106.83:097.68:511.89:321.06:354:19First Quarter15Sun
16Mon4:006.74:017.49:421.810:211.16:374:18First Quarter16Mon
17Tue4:506.84:547.310:361.811:101.16:384:17First Quarter17Tue
18Wed5:397.05:497.311:311.611:591.06:394:16First Quarter18Wed
19Thu6:287.36:457.312:281.36:404:16Waxing Gibbous19Thu
20Fri7:167.87:397.512:490.91:230.96:424:15Waxing Gibbous20Fri
21Sat8:028.38:317.71:380.72:150.36:434:14Waxing Gibbous21Sat
22Sun8:468.89:218.02:250.53:04-0.36:444:13Waxing Gibbous22Sun
23Mon9:319.310:108.23:120.23:52-0.86:454:13Full Moon23Mon
24Tue10:189.611:008.33:590.04:41-1.16:464:12Full Moon24Tue
25Wed11:079.811:518.44:48-0.15:31-1.36:484:11Full Moon25Wed
26Thu11:599.95:39-0.26:23-1.36:494:11Waning Gibbous26Thu
27Fri12:448.312:529.86:32-0.17:17-1.16:504:10Waning Gibbous27Fri
28Sat1:398.21:499.57:270.18:13-0.86:514:10Waning Gibbous28Sat
29Sun2:378.12:499.08:270.39:13-0.56:524:10Third Quarter29Sun
30Mon3:408.03:558.69:320.510:14-0.26:534:09Third Quarter30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8423745)

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Common Questions About Portsmouth, NH Tides

Collapse All
When is the lowest tide this week in Portsmouth, NH?

The lowest tide this week in Portsmouth, NH is -0.3 ft on Sunday, Nov 8 at 4:41 pm.

When is the highest tide this week in Portsmouth, NH?

The highest tide this week in Portsmouth, NH is 8.8 ft on Sunday, Nov 8 at 10:24 am — worth noting for launching your boat and being alert for possible high tide flooding.

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

Portsmouth, NH is currently in a neap phase. Tonight's moon is 41% 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 minimum.

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 time is high tide in Portsmouth, NH today?

High tides in Portsmouth, NH today: 5:02 am (7.6 ft), 5:18 pm (8.3 ft). The 5:18 pm high of 8.3 ft is notably higher than the other — known as diurnal inequality, common on coasts influenced by lunar declination.

What time is low tide in Portsmouth, NH today?

Low tides in Portsmouth, NH today: 10:53 am (1.0 ft), 11:40 pm (0.2 ft).

What is the tidal range in Portsmouth, NH today?

Today's tidal range in Portsmouth, NH is 8.1 ft — the difference between the day's highest and lowest water level. This month's average daily range is about 8.4 ft, so today's swing is typical.

What is the moon phase in Portsmouth, NH tonight?

Tonight the moon over Portsmouth, NH is Third Quarter (41% illuminated). This places Portsmouth, NH in a neap tide cycle, so tidal ranges are near their weekly minimum this week.

What type of tides does Portsmouth, NH have — semi-diurnal, diurnal, or mixed?

Portsmouth, NH has semi-diurnal tides — two high tides and two low tides roughly every 24 hours and 50 minutes, with similar heights.

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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