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

TIDE TIMES for Sunday, August 16, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 4h 43m at 11:23 pm (0.0 ft)
Next high tide (tomorrow) : 5:14 am (7.3 ft)
Sunset today : 7:44 pm
Sunrise tomorrow : 5:50 am
Moon phase : Waxing Crescent (18% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Jul 1953

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed4:518.15:327.411:35-0.711:540.15:078:26Waning Gibbous1Wed
2Thu5:457.86:257.612:26-0.55:088:26Third Quarter2Thu
3Fri6:437.57:207.712:530.11:19-0.35:098:26Third Quarter3Fri
4Sat7:447.28:167.71:540.12:130.05:098:26Third Quarter4Sat
5Sun8:476.99:147.72:570.13:110.35:108:25Waning Crescent5Sun
6Mon9:536.710:157.74:020.14:120.55:108:25Waning Crescent6Mon
7Tue10:596.611:147.85:080.05:140.75:118:25Waning Crescent7Tue
8Wed11:596.66:09-0.16:130.75:128:24Waning Crescent8Wed
9Thu12:107.812:556.67:04-0.27:060.75:128:24New Moon9Thu
10Fri1:027.81:466.67:55-0.27:570.75:138:24New Moon10Fri
11Sat1:517.82:346.78:43-0.28:440.75:148:23New Moon11Sat
12Sun2:377.73:176.79:26-0.29:280.75:158:23New Moon12Sun
13Mon3:207.63:586.710:07-0.110:110.85:168:22Waxing Crescent13Mon
14Tue4:017.44:376.710:440.110:520.95:168:21Waxing Crescent14Tue
15Wed4:417.25:166.711:210.311:350.95:178:21Waxing Crescent15Wed
16Thu5:226.95:556.711:590.55:188:20Waxing Crescent16Thu
17Fri6:056.66:366.712:191.012:370.75:198:19First Quarter17Fri
18Sat6:526.37:186.71:051.11:180.95:208:19First Quarter18Sat
19Sun7:416.08:036.71:541.22:021.25:218:18First Quarter19Sun
20Mon8:335.88:526.72:451.22:501.35:228:17First Quarter20Mon
21Tue9:305.79:446.83:401.13:421.45:238:16Waxing Gibbous21Tue
22Wed10:295.710:397.04:391.04:381.45:248:15Waxing Gibbous22Wed
23Thu11:265.911:337.35:350.75:331.25:258:15Waxing Gibbous23Thu
24Fri12:186.26:270.46:260.95:268:14Waxing Gibbous24Fri
25Sat12:247.71:076.57:160.07:170.55:278:13Full Moon25Sat
26Sun1:148.01:566.98:04-0.48:080.25:288:12Full Moon26Sun
27Mon2:048.32:447.38:51-0.78:59-0.15:298:11Full Moon27Mon
28Tue2:548.43:317.69:37-0.99:51-0.35:308:10Waning Gibbous28Tue
29Wed3:448.44:197.910:24-1.010:43-0.45:318:09Waning Gibbous29Wed
30Thu4:358.25:088.011:12-0.811:38-0.45:328:07Waning Gibbous30Thu
31Fri5:297.96:008.012:02-0.65:338:06Third Quarter31Fri
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 2:18 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 spring phase. Tonight's moon is 18% 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 maximum.

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 (18% illuminated). This places Squamscott River, Great Bay, NH in a spring tide cycle, so tidal ranges are near their weekly maximum 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