Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

62°
H -°
L 46°
NNW
8mph
Low tide
2:19 am
Photo Credits

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

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : in 5h 08m at 2:19 am (1.1 ft)
Next high tide (tomorrow) : 8:15 am (5.7 ft)
Sunset today : 6:48 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Sep 1939

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri3:257.23:457.19:530.310:100.46:077:20Waning Gibbous1Fri
2Sat4:007.04:177.110:250.410:460.46:087:18Waning Gibbous2Sat
3Sun4:366.94:517.111:010.511:260.56:097:16Waning Gibbous3Sun
4Mon5:146.75:307.111:390.66:107:15Waning Gibbous4Mon
5Tue5:586.56:157.112:090.512:230.76:117:13Third Quarter5Tue
6Wed6:486.47:067.112:580.51:120.86:127:11Third Quarter6Wed
7Thu7:436.38:027.21:520.52:060.86:137:09Third Quarter7Thu
8Fri8:436.49:047.32:510.53:060.86:147:08Waning Crescent8Fri
9Sat9:486.610:097.63:540.34:100.56:157:06Waning Crescent9Sat
10Sun10:516.911:127.94:570.05:140.26:167:04Waning Crescent10Sun
11Mon11:497.45:56-0.46:14-0.36:187:02Waning Crescent11Mon
12Tue12:108.312:437.86:51-0.87:10-0.76:197:01New Moon12Tue
13Wed1:058.51:358.27:43-1.08:05-1.06:206:59New Moon13Wed
14Thu2:008.62:268.58:33-1.18:58-1.26:216:57New Moon14Thu
15Fri2:538.53:168.69:23-1.19:51-1.26:226:55Waxing Crescent15Fri
16Sat3:458.34:068.510:13-0.810:44-1.06:236:53Waxing Crescent16Sat
17Sun4:388.04:588.211:03-0.511:38-0.76:246:52Waxing Crescent17Sun
18Mon5:337.55:527.911:560.06:256:50First Quarter18Mon
19Tue6:317.16:507.512:36-0.312:530.46:266:48First Quarter19Tue
20Wed7:326.77:507.21:360.11:520.86:276:46First Quarter20Wed
21Thu8:346.48:526.92:390.42:551.06:296:44First Quarter21Thu
22Fri9:356.39:536.83:420.63:581.16:306:43Waxing Gibbous22Fri
23Sat10:346.410:516.94:430.74:591.16:316:41Waxing Gibbous23Sat
24Sun10:256.510:416.94:370.64:520.95:325:39Waxing Gibbous24Sun
25Mon11:116.711:267.05:230.55:380.75:335:37Waxing Gibbous25Mon
26Tue11:516.96:040.56:190.55:345:35Full Moon26Tue
27Wed12:087.112:297.16:400.46:560.45:355:34Full Moon27Wed
28Thu12:467.21:047.27:130.47:320.25:365:32Full Moon28Thu
29Fri1:237.11:377.37:460.48:070.25:375:30Full Moon29Fri
30Sat1:587.12:097.38:190.48:420.15:395:28Waning Gibbous30Sat
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 neap phase. Tonight's moon is 48% 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 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 (48% illuminated). This places Squamscott River, Great Bay, NH in a neap tide cycle, so tidal ranges are near their weekly minimum 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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