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

TIDE TIMES for Sunday, June 21, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 5h 17m at 1:45 pm (0.0 ft)
Next high tide : 7:46 pm (7.2 ft)
Sunset today : 8:26 pm
Sunrise tomorrow : 5:04 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - May 2017

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon5:408.26:297.312:29-0.85:367:44First Quarter1Mon
2Tue6:437.87:337.112:470.21:31-0.55:357:45First Quarter2Tue
3Wed7:497.58:387.01:530.52:36-0.15:337:47First Quarter3Wed
4Thu8:567.29:427.03:010.73:410.15:327:48First Quarter4Thu
5Fri10:037.110:437.14:110.74:450.25:317:49Waxing Gibbous5Fri
6Sat11:057.011:377.25:160.55:420.25:297:50Waxing Gibbous6Sat
7Sun12:007.06:120.36:320.35:287:51Waxing Gibbous7Sun
8Mon12:247.412:507.07:020.17:160.35:277:52Waxing Gibbous8Mon
9Tue1:077.51:347.07:460.07:560.45:267:53Full Moon9Tue
10Wed1:467.52:166.98:27-0.18:340.55:257:54Full Moon10Wed
11Thu2:237.52:556.99:05-0.19:090.65:237:56Full Moon11Thu
12Fri2:597.53:336.89:410.09:440.85:227:57Full Moon12Fri
13Sat3:337.44:106.610:160.110:200.95:217:58Waning Gibbous13Sat
14Sun4:087.34:486.510:520.210:571.15:207:59Waning Gibbous14Sun
15Mon4:457.15:286.411:300.311:381.25:198:00Waning Gibbous15Mon
16Tue5:267.06:116.312:120.45:188:01Waning Gibbous16Tue
17Wed6:116.86:586.312:231.312:570.55:178:02Third Quarter17Wed
18Thu7:006.77:476.31:121.31:460.65:168:03Third Quarter18Thu
19Fri7:536.78:386.52:051.32:360.65:158:04Third Quarter19Fri
20Sat8:506.79:316.83:011.13:290.55:148:05Third Quarter20Sat
21Sun9:496.910:247.24:000.84:240.35:148:06Waning Crescent21Sun
22Mon10:487.111:167.74:590.35:190.15:138:07Waning Crescent22Mon
23Tue11:457.45:55-0.26:11-0.25:128:08Waning Crescent23Tue
24Wed12:068.212:397.66:49-0.77:03-0.45:118:09New Moon24Wed
25Thu12:578.61:337.87:41-1.17:54-0.65:108:10New Moon25Thu
26Fri1:488.92:287.98:34-1.48:47-0.65:108:11New Moon26Fri
27Sat2:409.03:227.99:27-1.59:40-0.55:098:12Waxing Crescent27Sat
28Sun3:338.94:177.810:21-1.410:34-0.35:088:13Waxing Crescent28Sun
29Mon4:288.75:147.711:16-1.211:31-0.15:088:13Waxing Crescent29Mon
30Tue5:258.36:147.512:13-0.95:078:14Waxing Crescent30Tue
31Wed6:267.97:157.312:320.21:13-0.55:078:15First Quarter31Wed
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 4:45 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 neap phase. Tonight's moon is 48% 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 (48% 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