Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

57°
H -°
L 51°
NNE
0mph
High tide
10:23 pm
Photo Credits

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

TIDE TIMES for Monday, September 21, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : 5:16 am (1.0 ft)
Next high tide : in 2h 54m at 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 - Dec 1935

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun4:366.74:447.410:530.611:32-0.16:544:10First Quarter1Sun
2Mon5:306.85:427.311:520.66:554:10First Quarter2Mon
3Tue6:276.96:457.112:270.012:540.56:564:09First Quarter3Tue
4Wed7:257.27:507.01:240.11:580.46:574:09First Quarter4Wed
5Thu8:257.48:566.92:220.13:040.16:584:09Waxing Gibbous5Thu
6Fri9:247.710:017.03:230.24:09-0.26:594:09Waxing Gibbous6Fri
7Sat10:208.011:007.04:220.15:09-0.57:004:09Waxing Gibbous7Sat
8Sun11:148.211:557.15:180.16:03-0.87:014:08Full Moon8Sun
9Mon12:058.36:110.16:55-0.97:024:08Full Moon9Mon
10Tue12:487.112:558.37:010.17:45-0.97:034:08Full Moon10Tue
11Wed1:387.11:448.27:500.28:33-0.87:044:08Full Moon11Wed
12Thu2:267.02:318.08:380.39:19-0.57:054:09Waning Gibbous12Thu
13Fri3:126.93:177.79:250.510:04-0.37:064:09Waning Gibbous13Fri
14Sat3:586.74:037.310:120.710:490.17:074:09Waning Gibbous14Sat
15Sun4:456.64:516.911:010.911:350.47:074:09Waning Gibbous15Sun
16Mon5:336.45:426.611:531.17:084:09Third Quarter16Mon
17Tue6:216.46:356.212:220.712:471.27:094:10Third Quarter17Tue
18Wed7:106.47:306.01:090.91:421.27:094:10Third Quarter18Wed
19Thu7:596.48:275.81:571.12:391.27:104:10Third Quarter19Thu
20Fri8:496.59:245.82:471.23:361.07:114:11Waning Crescent20Fri
21Sat9:396.710:185.93:391.34:290.87:114:11Waning Crescent21Sat
22Sun10:266.911:076.04:291.25:170.57:124:12Waning Crescent22Sun
23Mon11:107.111:526.25:151.16:000.37:124:12Waning Crescent23Mon
24Tue11:537.45:580.96:430.07:134:13New Moon24Tue
25Wed12:356.412:357.66:410.77:25-0.37:134:13New Moon25Wed
26Thu1:186.51:197.87:250.58:07-0.57:134:14New Moon26Thu
27Fri2:006.72:038.08:100.38:50-0.67:144:14Waxing Crescent27Fri
28Sat2:446.92:498.08:570.19:35-0.77:144:15Waxing Crescent28Sat
29Sun3:297.13:377.99:460.110:21-0.77:144:16Waxing Crescent29Sun
30Mon4:177.24:297.710:390.011:11-0.57:144:17Waxing Crescent30Mon
31Tue5:087.35:277.311:360.17:154:17First Quarter31Tue
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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