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

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : 4:05 am (1.1 ft)
Next high tide : in 18m at 9:07 pm (6.6 ft)
Sunset today : 7:37 pm
Sunrise tomorrow : 5:56 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Nov 1946

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri6:125.86:136.412:110.912:211.76:174:36First Quarter1Fri
2Sat7:065.87:106.41:031.01:161.76:194:35First Quarter2Sat
3Sun8:015.98:086.51:581.02:141.56:204:34First Quarter3Sun
4Mon8:546.29:066.72:530.93:131.26:214:32Waxing Gibbous4Mon
5Tue9:446.610:007.03:450.64:080.86:224:31Waxing Gibbous5Tue
6Wed10:297.110:507.34:340.35:000.26:244:30Waxing Gibbous6Wed
7Thu11:137.711:387.65:200.05:48-0.36:254:29Full Moon7Thu
8Fri11:568.16:04-0.36:35-0.86:264:28Full Moon8Fri
9Sat12:277.712:418.56:50-0.57:24-1.16:284:26Full Moon9Sat
10Sun1:167.81:288.77:37-0.58:14-1.36:294:25Full Moon10Sun
11Mon2:077.82:178.78:26-0.59:05-1.36:304:24Waning Gibbous11Mon
12Tue2:597.63:098.69:17-0.39:58-1.16:314:23Waning Gibbous12Tue
13Wed3:547.44:058.310:110.010:56-0.86:334:22Waning Gibbous13Wed
14Thu4:557.15:067.911:110.311:59-0.46:344:21Third Quarter14Thu
15Fri6:006.96:137.512:160.66:354:20Third Quarter15Fri
16Sat7:066.87:227.21:04-0.11:260.86:374:19Third Quarter16Sat
17Sun8:116.88:307.12:100.12:360.86:384:18Third Quarter17Sun
18Mon9:136.99:357.03:140.23:440.66:394:18Waning Crescent18Mon
19Tue10:087.110:327.04:130.34:440.46:404:17Waning Crescent19Tue
20Wed10:577.311:236.95:040.35:350.26:424:16Waning Crescent20Wed
21Thu11:407.45:490.46:210.06:434:15New Moon21Thu
22Fri12:096.912:207.56:300.57:03-0.16:444:15New Moon22Fri
23Sat12:526.812:577.57:080.67:42-0.16:454:14New Moon23Sat
24Sun1:326.71:337.47:440.78:190.06:464:13New Moon24Sun
25Mon2:106.62:087.38:200.98:540.16:484:13New Moon25Mon
26Tue2:486.42:447.28:551.09:310.26:494:12Waxing Crescent26Tue
27Wed3:256.33:217.09:331.210:090.46:504:12Waxing Crescent27Wed
28Thu4:056.14:016.910:121.310:500.56:514:11Waxing Crescent28Thu
29Fri4:486.04:456.710:561.411:350.66:524:11Waxing Crescent29Fri
30Sat5:356.05:356.611:451.56:534:10First Quarter30Sat
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 12:36 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 transitional phase. Tonight's moon is 65% 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 First Quarter (65% 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