Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

67°
H -°
L 51°
E
6mph
Low tide
4:26 pm
Photo Credits

Tides Today & Tomorrow in Squamscott River, Great Bay, NH

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 1h 03m at 4:26 pm (1.6 ft)
Next high tide : 10:23 pm (6.5 ft)
Sunset today : 6:43 pm
Sunrise tomorrow : 6:30 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Apr 1936

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed9:156.79:566.43:201.14:030.55:256:09Waxing Gibbous1Wed
2Thu10:156.810:486.64:240.94:570.55:236:10Waxing Gibbous2Thu
3Fri11:066.811:336.85:180.75:430.45:216:12Waxing Gibbous3Fri
4Sat11:526.96:040.56:240.45:206:13Waxing Gibbous4Sat
5Sun12:127.012:336.96:450.37:000.45:186:14Full Moon5Sun
6Mon12:487.11:126.97:230.17:330.55:166:15Full Moon6Mon
7Tue1:227.21:486.87:580.18:050.55:146:16Full Moon7Tue
8Wed1:547.32:236.78:310.08:370.65:136:17Full Moon8Wed
9Thu2:267.22:586.69:050.19:100.85:116:18Waning Gibbous9Thu
10Fri2:587.23:336.49:400.29:450.95:096:20Waning Gibbous10Fri
11Sat3:337.14:116.310:180.310:251.05:086:21Waning Gibbous11Sat
12Sun4:137.04:556.111:010.411:091.15:066:22Waning Gibbous12Sun
13Mon4:596.95:446.111:490.55:046:23Third Quarter13Mon
14Tue5:516.96:396.112:001.212:420.55:036:24Third Quarter14Tue
15Wed6:496.97:376.312:571.11:390.55:016:25Third Quarter15Wed
16Thu7:526.98:376.61:581.02:380.34:596:27Waning Crescent16Thu
17Fri8:577.19:367.13:030.73:380.14:586:28Waning Crescent17Fri
18Sat9:597.410:307.64:070.24:35-0.24:566:29Waning Crescent18Sat
19Sun10:587.711:228.25:06-0.45:28-0.54:546:30Waning Crescent19Sun
20Mon11:537.96:01-0.96:19-0.74:536:31New Moon20Mon
21Tue12:128.612:478.06:54-1.37:09-0.74:516:32New Moon21Tue
22Wed1:028.81:408.07:46-1.58:00-0.74:506:33New Moon22Wed
23Thu1:528.82:337.88:38-1.58:51-0.54:486:35Waxing Crescent23Thu
24Fri2:438.73:267.69:31-1.39:43-0.14:476:36Waxing Crescent24Fri
25Sat3:368.44:217.210:25-0.910:370.24:456:37Waxing Crescent25Sat
26Sun5:327.96:206.912:22-0.45:447:38First Quarter26Sun
27Mon6:327.57:216.612:370.61:220.05:427:39First Quarter27Mon
28Tue7:357.18:226.51:400.92:230.35:417:40First Quarter28Tue
29Wed8:386.79:226.52:451.13:240.65:397:42First Quarter29Wed
30Thu9:416.610:196.63:501.14:230.75:387:43Waxing Gibbous30Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8422687)

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Common Questions About Squamscott River, Great Bay, NH Tides

Collapse All
Is this week a spring tide or neap tide in Squamscott River, Great Bay, NH?

Squamscott River, Great Bay, NH is currently in a transitional phase. Tonight's moon is 75% 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 shifting between spring and neap.

What datum are Squamscott River, Great Bay, 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 Squamscott River, Great Bay, NH?

Tide predictions for Squamscott River, Great Bay, 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 Squamscott River, Great Bay, NH?

Tide data for Squamscott River, Great Bay, NH is sourced from NOAA Station #8422687. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8422687.

What is the moon phase in Squamscott River, Great Bay, NH tonight?

Tonight the moon over Squamscott River, Great Bay, NH is Waxing Gibbous (75% illuminated). This places Squamscott River, Great Bay, NH in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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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