Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

62°
H -°
L 61°
N
1mph
High tide
6:23 am
Photo Credits

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

TIDE TIMES for Thursday, September 17, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 12:37 pm (1.3 ft)
Next high tide : in 3h 49m at 6:23 am (6.2 ft)
Sunset today : 6:50 pm
Sunrise tomorrow : 6:25 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Mar 1941

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:127.13:307.09:400.19:560.26:195:32Waxing Crescent1Sat
2Sun3:477.04:086.710:180.210:320.46:185:33Waxing Crescent2Sun
3Mon4:246.94:496.410:590.411:120.76:165:34Waxing Crescent3Mon
4Tue5:056.75:356.211:430.611:550.96:145:36First Quarter4Tue
5Wed5:506.56:255.912:310.86:135:37First Quarter5Wed
6Thu6:406.47:205.812:441.11:240.96:115:38First Quarter6Thu
7Fri7:356.48:195.81:361.32:220.96:095:39First Quarter7Fri
8Sat8:346.59:195.92:341.23:220.86:085:41Waxing Gibbous8Sat
9Sun9:336.810:146.33:341.04:190.46:065:42Waxing Gibbous9Sun
10Mon10:287.111:046.74:320.75:110.06:045:43Waxing Gibbous10Mon
11Tue11:197.611:517.25:240.25:58-0.46:025:44Waxing Gibbous11Tue
12Wed12:087.96:14-0.36:44-0.86:015:45Full Moon12Wed
13Thu12:367.712:568.27:02-0.87:30-1.15:595:47Full Moon13Thu
14Fri1:228.11:458.47:51-1.18:16-1.25:575:48Full Moon14Fri
15Sat2:088.42:348.38:41-1.39:03-1.25:555:49Waning Gibbous15Sat
16Sun2:558.53:258.29:31-1.39:52-1.05:545:50Waning Gibbous16Sun
17Mon3:458.44:197.810:24-1.210:44-0.65:525:51Waning Gibbous17Mon
18Tue4:398.25:177.411:21-0.911:41-0.25:505:53Third Quarter18Tue
19Wed5:377.96:217.012:23-0.55:485:54Third Quarter19Wed
20Thu6:417.57:286.712:430.21:29-0.25:475:55Third Quarter20Thu
21Fri7:497.28:376.61:490.52:380.15:455:56Third Quarter21Fri
22Sat8:587.19:436.63:000.73:470.15:435:57Waning Crescent22Sat
23Sun10:037.110:416.84:080.64:480.15:415:58Waning Crescent23Sun
24Mon11:007.211:327.05:080.45:410.05:396:00Waning Crescent24Mon
25Tue11:497.35:590.26:270.05:386:01Waning Crescent25Tue
26Wed12:167.112:347.36:450.17:070.05:366:02New Moon26Wed
27Thu12:577.21:157.37:260.07:440.05:346:03New Moon27Thu
28Fri1:337.31:537.28:04-0.18:180.15:326:04New Moon28Fri
29Sat2:087.32:307.18:39-0.18:510.35:316:05New Moon29Sat
30Sun2:417.33:056.99:140.09:240.45:296:07Waxing Crescent30Sun
31Mon3:147.23:416.79:490.19:590.65:276:08Waxing Crescent31Mon
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 39% 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 First Quarter (39% 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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