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

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 27m at 2:01 pm (0.6 ft)
Next high tide : 8:00 pm (7.1 ft)
Sunset today : 8:16 pm
Sunrise tomorrow : 5:23 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Jan 1996

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon10:057.210:406.44:090.64:530.27:154:19Waxing Gibbous1Mon
2Tue10:557.211:306.55:010.75:430.17:154:19Waxing Gibbous2Tue
3Wed11:407.35:480.76:270.07:154:20Waxing Gibbous3Wed
4Thu12:156.512:217.36:300.67:08-0.17:154:21Full Moon4Thu
5Fri12:566.61:017.47:100.67:45-0.17:154:22Full Moon5Fri
6Sat1:356.61:387.47:460.68:20-0.17:154:23Full Moon6Sat
7Sun2:116.62:137.38:220.68:53-0.17:144:24Full Moon7Sun
8Mon2:466.62:487.28:570.69:270.07:144:25Waning Gibbous8Mon
9Tue3:206.63:237.19:340.610:010.07:144:26Waning Gibbous9Tue
10Wed3:556.64:007.010:130.610:380.17:144:27Waning Gibbous10Wed
11Thu4:326.74:426.810:550.711:190.27:134:28Waning Gibbous11Thu
12Fri5:136.75:286.611:420.67:134:30Third Quarter12Fri
13Sat5:596.86:206.512:040.312:330.67:134:31Third Quarter13Sat
14Sun6:496.97:176.412:530.41:290.57:124:32Third Quarter14Sun
15Mon7:457.18:206.41:460.42:300.37:124:33Waning Crescent15Mon
16Tue8:447.49:256.52:450.43:340.07:114:34Waning Crescent16Tue
17Wed9:467.710:286.83:470.24:36-0.47:114:35Waning Crescent17Wed
18Thu10:458.111:277.24:48-0.15:34-0.87:104:37Waning Crescent18Thu
19Fri11:428.55:46-0.46:30-1.27:104:38New Moon19Fri
20Sat12:237.512:378.76:42-0.77:23-1.57:094:39New Moon20Sat
21Sun1:177.81:328.87:37-0.98:15-1.67:084:40New Moon21Sun
22Mon2:098.02:258.78:31-1.09:06-1.57:084:42Waxing Crescent22Mon
23Tue3:008.03:178.59:24-0.99:56-1.37:074:43Waxing Crescent23Tue
24Wed3:527.94:118.010:18-0.710:47-0.97:064:44Waxing Crescent24Wed
25Thu4:457.75:077.511:15-0.411:41-0.47:054:45First Quarter25Thu
26Fri5:407.56:067.012:14-0.17:044:47First Quarter26Fri
27Sat6:367.27:076.612:360.11:150.27:044:48First Quarter27Sat
28Sun7:347.08:096.21:330.52:190.57:034:49First Quarter28Sun
29Mon8:336.89:126.12:330.83:230.57:024:51Waxing Gibbous29Mon
30Tue9:326.810:116.13:341.04:240.57:014:52Waxing Gibbous30Tue
31Wed10:266.911:036.24:321.05:160.47:004:53Waxing Gibbous31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8422687)

Common Questions About Squamscott River, Great Bay, NH Tides

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What time does the tide turn (slack tide) in Squamscott River, Great Bay, NH today?

Slack tide in Squamscott River, Great Bay, NH is approximately 5:00 pm — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

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 52% 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 (52% 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