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

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 3:48 pm (1.3 ft)
Next high tide : in 26m at 9:32 am (6.0 ft)
Sunset today : 8:14 pm
Sunrise tomorrow : 5:25 am
Moon phase : Waxing Gibbous (71% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - May 2077

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:186.410:046.23:271.54:080.95:357:45First Quarter1Sat
2Sun10:186.410:576.44:301.45:030.95:347:46Waxing Gibbous2Sun
3Mon11:126.511:426.65:271.25:500.85:337:47Waxing Gibbous3Mon
4Tue12:006.56:150.96:320.85:317:48Waxing Gibbous4Tue
5Wed12:236.912:446.66:580.77:080.75:307:49Waxing Gibbous5Wed
6Thu1:007.11:256.77:360.47:430.75:297:51Full Moon6Thu
7Fri1:347.32:046.78:130.28:170.75:287:52Full Moon7Fri
8Sat2:087.42:416.78:490.08:520.75:267:53Full Moon8Sat
9Sun2:427.53:196.79:25-0.19:290.75:257:54Full Moon9Sun
10Mon3:177.53:576.610:03-0.110:080.85:247:55Waning Gibbous10Mon
11Tue3:557.64:386.610:44-0.110:500.95:237:56Waning Gibbous11Tue
12Wed4:387.55:256.511:30-0.111:380.95:227:57Waning Gibbous12Wed
13Thu5:267.56:176.412:200.05:217:58Third Quarter13Thu
14Fri6:227.47:156.512:321.01:160.15:207:59Third Quarter14Fri
15Sat7:237.38:156.61:311.02:140.15:198:00Third Quarter15Sat
16Sun8:287.29:176.92:350.93:150.15:188:02Third Quarter16Sun
17Mon9:357.210:177.33:420.64:160.05:178:03Waning Crescent17Mon
18Tue10:417.311:147.74:490.35:15-0.15:168:04Waning Crescent18Tue
19Wed11:427.45:51-0.26:10-0.25:158:05Waning Crescent19Wed
20Thu12:068.112:387.56:47-0.67:01-0.25:148:06New Moon20Thu
21Fri12:568.41:337.67:40-0.97:51-0.25:138:07New Moon21Fri
22Sat1:458.52:257.58:31-1.08:400.05:128:08New Moon22Sat
23Sun2:338.43:157.49:21-1.09:280.25:128:09New Moon23Sun
24Mon3:208.34:057.110:10-0.810:160.55:118:09Waxing Crescent24Mon
25Tue4:078.04:546.910:58-0.511:050.85:108:10Waxing Crescent25Tue
26Wed4:567.65:456.611:48-0.111:561.05:108:11Waxing Crescent26Wed
27Thu5:477.36:386.412:390.25:098:12First Quarter27Thu
28Fri6:416.97:316.312:501.31:320.55:088:13First Quarter28Fri
29Sat7:366.68:246.31:471.42:230.85:088:14First Quarter29Sat
30Sun8:326.49:166.32:441.53:150.95:078:15First Quarter30Sun
31Mon9:296.310:066.53:431.54:061.05:078:16First Quarter31Mon
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 12:40 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 71% 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 (71% 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