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

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 23m at 1:08 am (0.5 ft)
Next high tide : 6:59 am (6.4 ft)
Sunset today : 7:40 pm
Sunrise tomorrow : 5:54 am
Moon phase : First Quarter (46% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Feb 1949

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue3:196.63:257.09:360.610:010.26:584:55Waxing Crescent1Tue
2Wed3:546.64:026.710:140.710:360.46:574:57Waxing Crescent2Wed
3Thu4:296.54:426.410:550.811:120.66:564:58Waxing Crescent3Thu
4Fri5:076.55:266.111:380.911:520.96:554:59First Quarter4Fri
5Sat5:486.46:145.812:261.06:545:01First Quarter5Sat
6Sun6:336.47:085.612:361.11:171.06:535:02First Quarter6Sun
7Mon7:236.48:075.51:251.32:141.06:515:03First Quarter7Mon
8Tue8:206.59:125.52:201.43:170.86:505:05Waxing Gibbous8Tue
9Wed9:226.710:135.83:211.34:190.56:495:06Waxing Gibbous9Wed
10Thu10:217.111:086.14:221.05:160.16:485:07Waxing Gibbous10Thu
11Fri11:167.611:596.65:180.66:07-0.46:465:09Waxing Gibbous11Fri
12Sat12:088.06:110.26:56-0.86:455:10Full Moon12Sat
13Sun12:487.012:598.37:03-0.37:44-1.16:445:11Full Moon13Sun
14Mon1:357.51:498.57:54-0.68:30-1.36:425:13Full Moon14Mon
15Tue2:227.82:398.58:46-0.99:17-1.36:415:14Waning Gibbous15Tue
16Wed3:098.03:308.29:37-1.010:04-1.16:395:15Waning Gibbous16Wed
17Thu3:588.04:237.810:31-0.910:54-0.76:385:17Waning Gibbous17Thu
18Fri4:497.95:217.311:27-0.611:47-0.26:365:18Third Quarter18Fri
19Sat5:447.76:236.812:28-0.36:355:19Third Quarter19Sat
20Sun6:437.47:296.312:440.31:330.06:335:21Third Quarter20Sun
21Mon7:477.18:396.01:460.82:430.36:325:22Third Quarter21Mon
22Tue8:556.99:486.02:551.03:540.46:305:23Waning Crescent22Tue
23Wed10:016.910:496.14:041.14:570.36:295:24Waning Crescent23Wed
24Thu10:597.011:416.25:061.05:510.26:275:26Waning Crescent24Thu
25Fri11:507.15:580.86:380.16:265:27Waning Crescent25Fri
26Sat12:266.412:347.26:430.67:180.06:245:28New Moon26Sat
27Sun1:076.61:147.27:240.57:540.06:225:29New Moon27Sun
28Mon1:436.71:517.28:020.48:270.16:215:31New Moon28Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8422687)

Common Questions About Squamscott River, Great Bay, NH Tides

Show All
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 4:03 am — 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 neap phase. Tonight's moon is 46% 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 (46% 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