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

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 3:48 pm (1.3 ft)
Next high tide : in 3h 24m at 9:32 am (6.0 ft)
Sunset today : 8:14 pm
Sunrise tomorrow : 5:25 am
Moon phase : Waxing Gibbous (71% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Feb 2077

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon7:457.38:266.41:430.32:320.16:574:56First Quarter1Mon
2Tue8:487.19:346.22:470.73:410.26:564:58Waxing Gibbous2Tue
3Wed9:507.110:366.23:520.84:450.16:554:59Waxing Gibbous3Wed
4Thu10:477.111:306.34:530.95:400.06:545:00Waxing Gibbous4Thu
5Fri11:397.25:460.86:29-0.16:525:02Waxing Gibbous5Fri
6Sat12:186.412:257.36:330.77:13-0.16:515:03Full Moon6Sat
7Sun1:026.51:077.37:150.67:52-0.16:505:04Full Moon7Sun
8Mon1:416.51:457.37:540.58:28-0.16:495:06Full Moon8Mon
9Tue2:176.62:217.28:310.59:010.06:475:07Full Moon9Tue
10Wed2:506.62:567.19:060.59:320.16:465:08Waning Gibbous10Wed
11Thu3:236.63:316.99:420.510:040.26:455:10Waning Gibbous11Thu
12Fri3:566.64:086.710:190.610:390.46:435:11Waning Gibbous12Fri
13Sat4:316.64:476.410:590.711:160.66:425:12Waning Gibbous13Sat
14Sun5:096.65:326.111:430.711:580.86:415:14Third Quarter14Sun
15Mon5:516.56:225.912:320.86:395:15Third Quarter15Mon
16Tue6:396.67:175.812:451.01:260.86:385:16Third Quarter16Tue
17Wed7:346.68:205.71:371.12:260.76:365:18Third Quarter17Wed
18Thu8:356.89:265.92:361.13:310.56:355:19Waning Crescent18Thu
19Fri9:397.110:286.23:400.94:340.16:335:20Waning Crescent19Fri
20Sat10:397.611:246.64:420.65:31-0.36:325:22Waning Crescent20Sat
21Sun11:368.05:390.16:24-0.86:305:23New Moon21Sun
22Mon12:167.112:298.46:34-0.47:14-1.26:295:24New Moon22Mon
23Tue1:077.61:228.67:27-0.88:03-1.46:275:25New Moon23Tue
24Wed1:567.92:148.68:20-1.08:51-1.46:265:27Waxing Crescent24Wed
25Thu2:448.13:058.49:12-1.19:39-1.26:245:28Waxing Crescent25Thu
26Fri3:338.23:588.110:05-1.110:29-0.96:225:29Waxing Crescent26Fri
27Sat4:238.04:537.511:00-0.811:21-0.46:215:30Waxing Crescent27Sat
28Sun5:177.85:537.011:58-0.56:195:32First Quarter28Sun
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 12:40 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 transitional phase. Tonight's moon is 71% 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 (71% 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