Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

64°
H 78°
L 46°
WNW
3mph
High tide
7:18 am
Photo Credits

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

TIDE TIMES for Friday, September 18, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 1:29 pm (1.5 ft)
Next high tide : in 19m at 7:18 am (5.9 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 - Jan 1941

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:317.23:407.69:490.210:22-0.47:154:19Waxing Crescent1Wed
2Thu4:187.04:277.210:370.411:080.07:154:20Waxing Crescent2Thu
3Fri5:056.85:176.811:280.711:550.37:154:21First Quarter3Fri
4Sat5:556.66:106.512:210.97:154:22First Quarter4Sat
5Sun6:456.57:046.212:430.61:161.07:154:23First Quarter5Sun
6Mon7:366.58:016.01:330.92:131.17:154:24First Quarter6Mon
7Tue8:286.58:595.92:251.13:121.07:154:25Waxing Gibbous7Tue
8Wed9:216.69:565.93:191.14:080.87:144:26Waxing Gibbous8Wed
9Thu10:116.810:466.14:121.14:580.67:144:27Waxing Gibbous9Thu
10Fri10:567.011:326.35:000.95:430.37:144:28Waxing Gibbous10Fri
11Sat11:397.35:430.76:240.07:144:29Full Moon11Sat
12Sun12:156.512:207.56:250.57:04-0.37:134:30Full Moon12Sun
13Mon12:566.71:007.77:060.37:43-0.57:134:31Full Moon13Mon
14Tue1:366.91:417.97:480.18:23-0.77:124:32Full Moon14Tue
15Wed2:167.12:248.08:32-0.19:05-0.87:124:34Waning Gibbous15Wed
16Thu2:587.33:088.09:17-0.29:48-0.97:114:35Waning Gibbous16Thu
17Fri3:427.43:557.810:05-0.310:35-0.87:114:36Waning Gibbous17Fri
18Sat4:297.54:477.610:57-0.311:25-0.67:104:37Third Quarter18Sat
19Sun5:217.55:457.311:54-0.27:104:38Third Quarter19Sun
20Mon6:187.56:477.012:19-0.412:55-0.17:094:40Third Quarter20Mon
21Tue7:187.57:536.81:17-0.12:00-0.17:084:41Third Quarter21Tue
22Wed8:227.59:036.72:190.13:08-0.17:084:42Waning Crescent22Wed
23Thu9:277.610:106.73:250.24:16-0.27:074:43Waning Crescent23Thu
24Fri10:287.711:106.94:300.25:18-0.57:064:45Waning Crescent24Fri
25Sat11:257.95:290.16:12-0.77:054:46New Moon25Sat
26Sun12:047.012:178.06:22-0.17:03-0.87:044:47New Moon26Sun
27Mon12:557.21:068.07:12-0.17:49-0.87:034:49New Moon27Mon
28Tue1:417.21:517.97:59-0.18:33-0.77:034:50New Moon28Tue
29Wed2:247.22:347.78:43-0.19:13-0.57:024:51Waxing Crescent29Wed
30Thu3:057.13:167.59:260.19:52-0.37:014:53Waxing Crescent30Thu
31Fri3:457.03:577.110:080.210:310.07:004:54Waxing Crescent31Fri
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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