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

TIDE TIMES for Sunday, July 19, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 12:19 pm (-0.2 ft)
Next high tide : in 4h 52m at 5:41 am (7.6 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 5:21 am
Moon phase : First Quarter (32% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Apr 2074

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun5:017.05:346.411:410.411:511.06:247:10Waxing Crescent1Sun
2Mon5:406.86:196.112:240.56:227:11Waxing Crescent2Mon
3Tue6:256.67:086.012:341.21:110.76:207:12First Quarter3Tue
4Wed7:156.58:025.91:231.32:030.86:197:13First Quarter4Wed
5Thu8:106.58:595.92:161.42:590.86:177:14First Quarter5Thu
6Fri9:106.69:586.13:141.43:580.76:157:16First Quarter6Fri
7Sat10:116.810:546.54:151.14:560.46:137:17Waxing Gibbous7Sat
8Sun11:097.111:457.05:150.75:500.16:127:18Waxing Gibbous8Sun
9Mon12:037.56:100.26:39-0.36:107:19Waxing Gibbous9Mon
10Tue12:327.512:537.97:01-0.47:26-0.76:087:20Full Moon10Tue
11Wed1:188.01:448.27:51-0.98:13-0.96:077:21Full Moon11Wed
12Thu2:058.42:348.38:41-1.39:01-1.06:057:23Full Moon12Thu
13Fri2:538.73:258.29:31-1.59:49-0.96:037:24Waning Gibbous13Fri
14Sat3:418.74:178.010:22-1.510:40-0.76:027:25Waning Gibbous14Sat
15Sun4:328.65:127.711:16-1.211:33-0.36:007:26Waning Gibbous15Sun
16Mon5:268.36:127.312:13-0.95:587:27Third Quarter16Mon
17Tue6:267.97:167.012:310.11:15-0.55:577:28Third Quarter17Tue
18Wed7:307.58:226.81:340.52:20-0.15:557:30Third Quarter18Wed
19Thu8:387.29:296.72:420.83:280.15:547:31Third Quarter19Thu
20Fri9:477.010:326.73:520.94:340.35:527:32Waning Crescent20Fri
21Sat10:517.011:296.95:000.85:340.35:507:33Waning Crescent21Sat
22Sun11:487.05:590.66:260.35:497:34Waning Crescent22Sun
23Mon12:187.112:377.06:500.47:100.35:477:35Waning Crescent23Mon
24Tue1:017.21:227.17:340.27:500.35:467:37New Moon24Tue
25Wed1:407.32:037.08:150.18:260.45:447:38New Moon25Wed
26Thu2:167.42:427.08:520.09:000.55:437:39New Moon26Thu
27Fri2:507.43:186.99:280.09:330.65:417:40New Moon27Fri
28Sat3:237.33:546.710:020.110:070.85:407:41Waxing Crescent28Sat
29Sun3:557.24:316.610:370.110:420.95:397:42Waxing Crescent29Sun
30Mon4:307.15:096.411:140.311:201.15:377:43Waxing Crescent30Mon
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 9:00 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 32% 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 (32% 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