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

TIDE TIMES for Saturday, July 18, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 1h 49m at 11:29 am (-0.6 ft)
Next high tide : 5:25 pm (7.5 ft)
Sunset today : 8:19 pm
Sunrise tomorrow : 5:20 am
Moon phase : Waxing Crescent (23% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Nov 2073

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed2:418.32:568.99:04-0.99:39-1.57:195:35Waxing Crescent1Wed
2Thu3:348.13:488.89:55-0.710:32-1.37:205:33Waxing Crescent2Thu
3Fri4:287.84:418.410:48-0.311:27-0.97:215:32Waxing Crescent3Fri
4Sat5:257.55:388.011:440.17:235:31Waxing Crescent4Sat
5Sun5:267.15:397.612:26-0.511:44 AM0.56:244:30First Quarter5Sun
6Mon6:286.96:437.212:28-0.112:480.86:254:28First Quarter6Mon
7Tue7:306.77:476.91:300.21:540.96:264:27First Quarter7Tue
8Wed8:316.78:496.82:320.42:591.06:284:26Waxing Gibbous8Wed
9Thu9:276.79:476.73:320.54:000.86:294:25Waxing Gibbous9Thu
10Fri10:186.910:396.84:250.64:530.66:304:24Waxing Gibbous10Fri
11Sat11:027.111:256.85:120.65:390.46:324:23Waxing Gibbous11Sat
12Sun11:437.25:520.56:200.36:334:22Waxing Gibbous12Sun
13Mon12:076.812:207.36:300.66:580.16:344:21Full Moon13Mon
14Tue12:476.812:557.47:040.67:340.16:354:20Full Moon14Tue
15Wed1:256.81:297.47:380.68:090.06:374:19Full Moon15Wed
16Thu2:016.72:037.48:120.78:440.06:384:18Full Moon16Thu
17Fri2:376.62:377.38:480.89:200.16:394:17Waning Gibbous17Fri
18Sat3:146.63:137.39:250.99:590.16:404:17Waning Gibbous18Sat
19Sun3:536.53:547.210:060.910:420.26:424:16Waning Gibbous19Sun
20Mon4:366.44:407.110:521.011:290.26:434:15Waning Gibbous20Mon
21Tue5:266.45:337.011:441.06:444:14Third Quarter21Tue
22Wed6:196.56:317.012:210.312:410.96:454:14Third Quarter22Wed
23Thu7:166.77:337.01:170.21:420.76:464:13Third Quarter23Thu
24Fri8:147.18:377.12:140.12:450.46:484:12Waning Crescent24Fri
25Sat9:137.59:417.33:140.03:490.06:494:12Waning Crescent25Sat
26Sun10:107.910:417.64:12-0.24:49-0.56:504:11Waning Crescent26Sun
27Mon11:038.411:377.85:08-0.55:45-1.06:514:11New Moon27Mon
28Tue11:558.76:01-0.66:39-1.36:524:10New Moon28Tue
29Wed12:327.912:468.86:53-0.77:32-1.56:534:10New Moon29Wed
30Thu1:267.91:388.87:44-0.68:24-1.46:544:10New Moon30Thu
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 2:27 pm — 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 transitional phase. Tonight's moon is 23% 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 Crescent (23% 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