Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

77°
H 79°
L 62°
SW
6mph
High tide
5:43 pm
Photo Credits

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

TIDE TIMES for Wednesday, September 16, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : 12:30 am (0.6 ft)
Next high tide : in 4h 36m at 5:43 pm (7.1 ft)
Sunset today : 6:52 pm
Sunrise tomorrow : 6:24 am
Moon phase : Waxing Crescent (30% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Jul 1942

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:508.84:337.810:36-1.310:52-0.35:078:26Waning Gibbous1Wed
2Thu4:458.55:287.711:30-1.011:49-0.15:088:26Waning Gibbous2Thu
3Fri5:428.16:257.612:25-0.65:088:26Third Quarter3Fri
4Sat6:417.67:227.412:490.21:21-0.35:098:26Third Quarter4Sat
5Sun7:417.28:187.31:510.42:160.15:098:26Third Quarter5Sun
6Mon8:416.89:137.22:520.63:120.55:108:25Third Quarter6Mon
7Tue9:416.510:087.13:540.74:090.75:118:25Waning Crescent7Tue
8Wed10:406.411:017.14:550.65:040.95:118:25Waning Crescent8Wed
9Thu11:356.311:497.25:500.65:551.05:128:24Waning Crescent9Thu
10Fri12:246.46:390.46:411.05:138:24Waning Crescent10Fri
11Sat12:337.31:096.47:230.37:231.05:148:23New Moon11Sat
12Sun1:157.31:526.58:030.28:020.95:148:23New Moon12Sun
13Mon1:557.42:326.68:410.28:400.95:158:22New Moon13Mon
14Tue2:337.43:096.69:170.19:170.85:168:22New Moon14Tue
15Wed3:097.43:456.79:510.19:540.85:178:21Waxing Crescent15Wed
16Thu3:457.44:216.710:260.010:330.85:188:20Waxing Crescent16Thu
17Fri4:227.44:576.811:020.011:140.75:198:20Waxing Crescent17Fri
18Sat5:017.35:366.911:410.011:580.75:208:19Waxing Crescent18Sat
19Sun5:457.26:197.112:230.15:208:18First Quarter19Sun
20Mon6:337.07:067.212:470.61:100.15:218:17First Quarter20Mon
21Tue7:266.97:577.41:400.52:000.25:228:17First Quarter21Tue
22Wed8:246.88:527.62:360.32:540.25:238:16First Quarter22Wed
23Thu9:266.89:527.83:370.23:520.25:248:15Waxing Gibbous23Thu
24Fri10:326.910:538.14:41-0.14:540.15:258:14Waxing Gibbous24Fri
25Sat11:357.111:538.45:44-0.45:550.05:268:13Waxing Gibbous25Sat
26Sun12:357.36:43-0.86:53-0.35:278:12Full Moon26Sun
27Mon12:508.61:327.67:39-1.07:50-0.45:288:11Full Moon27Mon
28Tue1:468.82:277.78:33-1.28:46-0.55:298:10Full Moon28Tue
29Wed2:418.83:207.89:26-1.29:40-0.55:308:09Waning Gibbous29Wed
30Thu3:348.64:117.810:16-1.110:33-0.45:318:08Waning Gibbous30Thu
31Fri4:278.35:027.711:06-0.811:27-0.25:328:07Waning Gibbous31Fri
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 30% 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 Crescent (30% 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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