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 (tomorrow) : in 5h 29m at 2:44 am (0.7 ft)
Next high tide (tomorrow) : 8:32 am (6.3 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 - Oct 2074

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon11:187.011:367.55:230.05:420.46:416:24Waxing Gibbous1Mon
2Tue12:127.26:20-0.16:380.26:426:22Waxing Gibbous2Tue
3Wed12:307.61:007.37:09-0.17:270.06:436:21Full Moon3Wed
4Thu1:187.61:437.47:53-0.18:12-0.16:456:19Full Moon4Thu
5Fri2:037.62:237.58:330.08:54-0.16:466:17Full Moon5Fri
6Sat2:447.43:017.59:110.19:330.06:476:15Full Moon6Sat
7Sun3:247.23:367.49:470.310:110.16:486:14Waning Gibbous7Sun
8Mon4:037.04:127.210:220.610:500.36:496:12Waning Gibbous8Mon
9Tue4:426.74:497.010:590.811:290.56:506:10Waning Gibbous9Tue
10Wed5:236.45:296.811:391.16:526:08Waning Gibbous10Wed
11Thu6:096.26:156.712:130.712:231.36:536:07Third Quarter11Thu
12Fri6:596.07:056.51:010.91:121.56:546:05Third Quarter12Fri
13Sat7:535.98:006.51:531.02:051.66:556:03Third Quarter13Sat
14Sun8:485.98:586.52:471.03:011.56:566:02Third Quarter14Sun
15Mon9:446.19:566.73:440.94:001.36:576:00Waning Crescent15Mon
16Tue10:376.410:517.04:390.74:571.06:595:59Waning Crescent16Tue
17Wed11:266.911:427.45:300.45:490.57:005:57Waning Crescent17Wed
18Thu12:107.46:170.06:38-0.17:015:55Waning Crescent18Thu
19Fri12:317.712:547.97:02-0.37:26-0.67:025:54New Moon19Fri
20Sat1:188.01:398.37:47-0.68:14-1.07:035:52New Moon20Sat
21Sun2:078.12:258.68:33-0.79:03-1.27:055:51New Moon21Sun
22Mon2:578.13:128.79:21-0.79:54-1.37:065:49Waxing Crescent22Mon
23Tue3:488.04:028.610:10-0.610:46-1.27:075:48Waxing Crescent23Tue
24Wed4:417.84:558.411:02-0.311:42-0.97:085:46Waxing Crescent24Wed
25Thu5:397.45:548.111:590.07:105:45First Quarter25Thu
26Fri6:437.16:587.712:43-0.61:010.47:115:43First Quarter26Fri
27Sat7:496.98:067.41:48-0.22:080.67:125:42First Quarter27Sat
28Sun8:566.89:147.32:540.03:180.77:135:40First Quarter28Sun
29Mon10:006.910:207.24:010.14:270.77:155:39Waxing Gibbous29Mon
30Tue10:597.111:207.25:040.25:300.57:165:38Waxing Gibbous30Tue
31Wed11:517.25:580.26:240.37:175:36Waxing 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 5:38 am — 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