Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

65°
H -°
L 46°
NW
6mph
Low tide
2:19 am
Photo Credits

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

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : in 6h 44m at 2:19 am (1.1 ft)
Next high tide (tomorrow) : 8:15 am (5.7 ft)
Sunset today : 6:48 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Nov 1939

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:296.93:367.69:470.510:23-0.26:174:37Waning Gibbous1Wed
2Thu4:166.84:257.610:360.611:14-0.16:184:35Waning Gibbous2Thu
3Fri5:096.85:227.411:300.66:204:34Third Quarter3Fri
4Sat6:086.86:247.312:100.012:300.66:214:33Third Quarter4Sat
5Sun7:096.97:297.31:090.01:340.56:224:32Third Quarter5Sun
6Mon8:127.18:367.32:110.02:410.36:234:30Waning Crescent6Mon
7Tue9:147.59:427.43:130.03:480.06:254:29Waning Crescent7Tue
8Wed10:117.810:427.64:14-0.24:49-0.46:264:28Waning Crescent8Wed
9Thu11:058.211:387.75:10-0.35:45-0.86:274:27New Moon9Thu
10Fri11:558.46:02-0.46:38-1.06:294:26New Moon10Fri
11Sat12:307.712:448.56:51-0.47:28-1.16:304:25New Moon11Sat
12Sun1:217.71:328.47:40-0.38:17-1.06:314:24New Moon12Sun
13Mon2:107.52:198.28:27-0.19:04-0.86:324:23Waxing Crescent13Mon
14Tue2:587.33:067.99:140.29:51-0.56:344:22Waxing Crescent14Tue
15Wed3:467.03:537.610:020.510:39-0.16:354:21Waxing Crescent15Wed
16Thu4:366.84:437.210:510.811:290.26:364:20Waxing Crescent16Thu
17Fri5:286.55:366.811:451.06:374:19First Quarter17Fri
18Sat6:216.46:316.612:210.512:401.26:394:18First Quarter18Sat
19Sun7:146.37:286.41:130.81:381.36:404:17First Quarter19Sun
20Mon8:066.48:246.32:060.92:361.36:414:16First Quarter20Mon
21Tue8:586.59:206.32:581.03:331.16:424:15Waxing Gibbous21Tue
22Wed9:466.710:126.43:481.04:250.96:444:15Waxing Gibbous22Wed
23Thu10:307.010:586.54:350.95:100.66:454:14Waxing Gibbous23Thu
24Fri11:117.211:416.65:170.85:520.36:464:13Waxing Gibbous24Fri
25Sat11:507.45:560.66:310.06:474:13Full Moon25Sat
26Sun12:236.812:287.76:350.57:11-0.36:494:12Full Moon26Sun
27Mon1:046.91:087.87:160.37:52-0.56:504:12Full Moon27Mon
28Tue1:457.01:498.07:580.28:34-0.66:514:11Waning Gibbous28Tue
29Wed2:277.12:338.08:420.29:19-0.66:524:11Waning Gibbous29Wed
30Thu3:127.13:198.09:290.210:06-0.66:534:10Waning Gibbous30Thu
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 neap phase. Tonight's moon is 48% 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 (48% 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

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