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

TIDE TIMES for Saturday, July 18, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 11:50 pm (0.1 ft)
Next high tide : in 1h 13m at 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 - Feb 2074

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu4:426.84:576.711:070.511:300.46:574:56Waxing Crescent1Thu
2Fri5:276.65:466.411:560.76:564:57First Quarter2Fri
3Sat6:136.56:386.012:140.712:470.96:554:59First Quarter3Sat
4Sun7:026.47:335.81:021.01:421.06:545:00First Quarter4Sun
5Mon7:556.38:335.71:521.22:401.16:535:01First Quarter5Mon
6Tue8:506.49:325.72:481.33:400.96:525:03Waxing Gibbous6Tue
7Wed9:456.510:275.93:451.34:360.76:505:04Waxing Gibbous7Wed
8Thu10:366.811:156.14:381.15:240.46:495:05Waxing Gibbous8Thu
9Fri11:227.111:596.45:260.86:080.16:485:07Waxing Gibbous9Fri
10Sat12:057.56:100.56:49-0.36:465:08Full Moon10Sat
11Sun12:416.712:487.86:540.27:30-0.66:455:09Full Moon11Sun
12Mon1:227.01:318.07:37-0.28:11-0.86:445:11Full Moon12Mon
13Tue2:037.32:158.18:22-0.48:53-1.06:425:12Waning Gibbous13Tue
14Wed2:457.63:008.19:08-0.69:36-1.06:415:13Waning Gibbous14Wed
15Thu3:287.73:477.99:56-0.710:23-0.86:405:15Waning Gibbous15Thu
16Fri4:157.84:397.610:48-0.611:12-0.66:385:16Waning Gibbous16Fri
17Sat5:077.75:377.311:44-0.56:375:17Third Quarter17Sat
18Sun6:037.66:406.912:06-0.312:45-0.36:355:19Third Quarter18Sun
19Mon7:047.57:476.61:050.11:51-0.16:345:20Third Quarter19Mon
20Tue8:107.38:586.52:090.43:010.06:325:21Waning Crescent20Tue
21Wed9:197.310:066.53:180.54:11-0.16:315:22Waning Crescent21Wed
22Thu10:237.511:066.74:260.55:13-0.36:295:24Waning Crescent22Thu
23Fri11:217.65:260.36:08-0.46:285:25Waning Crescent23Fri
24Sat12:006.912:137.76:190.16:57-0.56:265:26New Moon24Sat
25Sun12:487.11:007.77:080.07:41-0.56:245:28New Moon25Sun
26Mon1:327.21:447.77:53-0.18:22-0.56:235:29New Moon26Mon
27Tue2:127.22:257.58:34-0.18:59-0.36:215:30New Moon27Tue
28Wed2:497.23:047.39:140.09:35-0.16:205:31Waxing Crescent28Wed
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 8:37 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