Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

57°
H 59°
L 44°
NE
10mph
Low tide
4:38 pm
Photo Credits

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

TIDE TIMES for Wednesday, October 21, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 41m at 4:38 pm (1.3 ft)
Next high tide : 10:31 pm (6.6 ft)
Sunset today : 5:51 pm
Sunrise tomorrow : 7:04 am
Moon phase : Waxing Gibbous (78% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Sep 1883

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat12:377.71:057.27:15-0.17:290.15:116:23New Moon1Sat
2Sun1:207.61:457.37:55-0.18:100.15:126:21New Moon2Sun
3Mon2:017.52:227.38:320.18:490.25:136:19Waxing Crescent3Mon
4Tue2:397.32:577.29:070.29:270.35:146:18Waxing Crescent4Tue
5Wed3:177.03:337.19:420.410:050.45:166:16Waxing Crescent5Wed
6Thu3:566.84:107.010:180.710:460.65:176:14Waxing Crescent6Thu
7Fri4:376.54:516.810:580.911:300.85:186:12Waxing Crescent7Fri
8Sat5:236.25:376.711:411.15:196:11First Quarter8Sat
9Sun6:126.06:266.612:180.912:291.35:206:09First Quarter9Sun
10Mon7:065.97:206.61:101.01:211.35:216:07First Quarter10Mon
11Tue8:025.98:176.72:061.02:171.35:226:05First Quarter11Tue
12Wed9:006.19:147.03:040.93:151.15:236:04Waxing Gibbous12Wed
13Thu9:556.410:097.34:000.64:130.85:246:02Waxing Gibbous13Thu
14Fri10:446.911:017.74:520.25:060.35:256:00Waxing Gibbous14Fri
15Sat11:317.311:508.05:39-0.25:56-0.25:265:58Full Moon15Sat
16Sun12:177.86:25-0.66:46-0.65:285:56Full Moon16Sun
17Mon12:398.21:048.27:12-0.87:35-1.05:295:55Full Moon17Mon
18Tue1:298.41:518.57:59-0.98:26-1.25:305:53Waning Gibbous18Tue
19Wed2:198.32:408.68:47-0.99:17-1.25:315:51Waning Gibbous19Wed
20Thu3:118.13:308.59:37-0.710:11-1.05:325:49Waning Gibbous20Thu
21Fri4:057.84:258.310:29-0.411:09-0.75:335:47Waning Gibbous21Fri
22Sat5:047.55:248.011:27-0.15:345:45Third Quarter22Sat
23Sun6:087.16:297.712:11-0.412:290.35:355:44Third Quarter23Sun
24Mon7:146.97:357.41:16-0.11:350.65:365:42Third Quarter24Mon
25Tue8:216.78:437.32:240.12:440.75:375:40Waning Crescent25Tue
26Wed9:256.89:467.33:310.23:510.65:395:38Waning Crescent26Wed
27Thu10:236.910:437.34:310.24:510.55:405:36Waning Crescent27Thu
28Fri11:137.111:337.35:230.25:420.35:415:35Waning Crescent28Fri
29Sat11:587.26:090.16:280.25:425:33New Moon29Sat
30Sun12:187.312:387.36:490.27:100.15:435:31New Moon30Sun
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 78% 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 Waxing Gibbous (78% 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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