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

TIDE TIMES for Saturday, July 18, 2026
The tide is currently rising in Squamscott River, Great Bay, NH.
Next low tide : 11:50 pm (0.1 ft)
Next high tide : in 5h 52m at 5:25 pm (7.5 ft)
Sunset today : 8:19 pm
Sunrise tomorrow : 5:20 am
Moon phase : Waxing Crescent (23% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Squamscott River, Great Bay, NH Tides - Dec 2073

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri2:197.82:298.68:36-0.59:15-1.26:554:09Waxing Crescent1Fri
2Sat3:117.63:218.39:28-0.210:08-0.96:574:09Waxing Crescent2Sat
3Sun4:047.34:147.910:220.111:02-0.56:584:09Waxing Crescent3Sun
4Mon5:007.05:117.411:180.511:58-0.16:594:09First Quarter4Mon
5Tue5:586.86:107.012:180.87:004:08First Quarter5Tue
6Wed6:556.77:106.712:540.21:201.07:014:08First Quarter6Wed
7Thu7:516.68:096.41:510.52:211.07:014:08First Quarter7Thu
8Fri8:466.69:086.32:470.73:221.07:024:08Waxing Gibbous8Fri
9Sat9:376.710:036.33:410.84:180.87:034:08Waxing Gibbous9Sat
10Sun10:246.910:526.44:300.95:070.67:044:08Waxing Gibbous10Sun
11Mon11:077.111:376.55:140.85:510.47:054:08Waxing Gibbous11Mon
12Tue11:477.25:540.86:300.27:064:09Full Moon12Tue
13Wed12:196.512:247.36:320.77:080.07:074:09Full Moon13Wed
14Thu12:596.61:017.47:080.77:44-0.17:074:09Full Moon14Thu
15Fri1:376.61:377.57:450.68:21-0.27:084:09Full Moon15Fri
16Sat2:146.62:147.58:230.68:58-0.27:094:09Waning Gibbous16Sat
17Sun2:526.72:527.59:030.69:37-0.27:094:10Waning Gibbous17Sun
18Mon3:316.73:347.59:450.610:20-0.27:104:10Waning Gibbous18Mon
19Tue4:146.74:207.410:320.611:06-0.27:104:11Waning Gibbous19Tue
20Wed5:026.85:127.311:230.511:57-0.17:114:11Third Quarter20Wed
21Thu5:546.96:097.112:200.57:114:12Third Quarter21Thu
22Fri6:507.17:117.012:51-0.11:210.47:124:12Third Quarter22Fri
23Sat7:487.38:167.01:470.02:250.27:124:13Third Quarter23Sat
24Sun8:497.69:237.02:470.03:30-0.17:134:13Waning Crescent24Sun
25Mon9:497.910:267.23:49-0.14:34-0.57:134:14Waning Crescent25Mon
26Tue10:468.211:257.34:48-0.25:32-0.87:134:15Waning Crescent26Tue
27Wed11:408.45:44-0.36:27-1.17:144:15New Moon27Wed
28Thu12:207.512:328.56:37-0.47:20-1.27:144:16New Moon28Thu
29Fri1:137.51:248.57:29-0.48:10-1.27:144:17New Moon29Fri
30Sat2:047.52:138.48:20-0.38:59-1.17:144:18Waxing Crescent30Sat
31Sun2:537.43:028.19:10-0.19:47-0.87:144:18Waxing Crescent31Sun
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 8:37 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 23% 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 Crescent (23% 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