Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

41°
H 60°
L 52°
SSW
1mph
High tide
9:15 am
Photo Credits

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

TIDE TIMES for Sunday, September 20, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 3:25 pm (1.8 ft)
Next high tide : in 5h 21m at 9:15 am (5.6 ft)
Sunset today : 6:45 pm
Sunrise tomorrow : 6:29 am
Moon phase : First Quarter (67% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Jan 1937

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri4:047.24:167.510:250.210:56-0.37:154:19Waning Gibbous1Fri
2Sat4:537.05:087.011:180.411:450.17:154:20Third Quarter2Sat
3Sun5:436.96:026.612:130.67:154:21Third Quarter3Sun
4Mon6:346.76:586.212:340.51:090.87:154:22Third Quarter4Mon
5Tue7:256.67:555.91:240.92:070.97:154:23Third Quarter5Tue
6Wed8:186.68:555.82:171.13:070.97:154:24Waning Crescent6Wed
7Thu9:126.69:525.83:131.34:060.87:154:25Waning Crescent7Thu
8Fri10:046.710:445.94:071.34:580.77:144:26Waning Crescent8Fri
9Sat10:526.911:316.14:571.15:430.47:144:27Waning Crescent9Sat
10Sun11:357.15:411.06:240.27:144:28Waning Crescent10Sun
11Mon12:146.212:167.36:220.87:030.07:144:29New Moon11Mon
12Tue12:546.412:557.57:020.67:39-0.27:134:30New Moon12Tue
13Wed1:326.61:347.67:410.48:16-0.47:134:31New Moon13Wed
14Thu2:096.82:137.78:210.28:53-0.57:124:32Waxing Crescent14Thu
15Fri2:467.02:537.79:030.09:32-0.67:124:33Waxing Crescent15Fri
16Sat3:247.23:357.69:47-0.110:13-0.57:114:35Waxing Crescent16Sat
17Sun4:067.34:227.410:34-0.110:58-0.47:114:36Waxing Crescent17Sun
18Mon4:537.45:157.111:27-0.111:48-0.27:104:37First Quarter18Mon
19Tue5:447.56:136.812:240.07:104:38First Quarter19Tue
20Wed6:417.57:166.612:420.01:250.07:094:40First Quarter20Wed
21Thu7:427.58:256.41:410.32:320.07:084:41Waxing Gibbous21Thu
22Fri8:487.59:366.52:450.43:42-0.17:084:42Waxing Gibbous22Fri
23Sat9:547.710:416.63:530.44:48-0.37:074:43Waxing Gibbous23Sat
24Sun10:567.911:396.94:570.25:47-0.67:064:45Waxing Gibbous24Sun
25Mon11:538.05:560.06:41-0.87:054:46Full Moon25Mon
26Tue12:337.112:458.16:50-0.27:30-0.97:044:47Full Moon26Tue
27Wed1:227.31:358.17:41-0.38:17-0.97:034:49Full Moon27Wed
28Thu2:087.42:217.98:29-0.39:00-0.77:034:50Waning Gibbous28Thu
29Fri2:527.43:057.79:14-0.29:41-0.57:024:51Waning Gibbous29Fri
30Sat3:337.33:497.39:590.010:22-0.17:014:53Waning Gibbous30Sat
31Sun4:157.14:346.910:440.211:030.27:004:54Waning Gibbous31Sun
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 67% 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 First Quarter (67% 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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