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 : 11:29 am (-0.6 ft)
Next high tide : in 1h 34m at 4:47 am (8.1 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 - Jun 2073

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu11:166.411:377.05:320.95:420.95:068:16Waning Crescent1Thu
2Fri12:046.46:190.76:240.95:068:17Waning Crescent2Fri
3Sat12:187.212:486.57:010.57:030.95:058:18Waning Crescent3Sat
4Sun12:577.31:306.67:410.37:410.85:058:19New Moon4Sun
5Mon1:357.52:116.78:190.18:190.85:058:19New Moon5Mon
6Tue2:127.62:506.78:57-0.18:580.75:048:20New Moon6Tue
7Wed2:507.73:306.89:35-0.29:390.75:048:21New Moon7Wed
8Thu3:297.74:106.810:16-0.310:220.65:048:21Waxing Crescent8Thu
9Fri4:117.84:546.910:59-0.311:080.65:048:22Waxing Crescent9Fri
10Sat4:577.75:417.011:45-0.311:590.65:048:22Waxing Crescent10Sat
11Sun5:487.66:337.112:35-0.35:038:23First Quarter11Sun
12Mon6:447.57:287.212:540.51:28-0.25:038:23First Quarter12Mon
13Tue7:437.48:257.41:540.52:24-0.25:038:24First Quarter13Tue
14Wed8:467.29:247.62:560.33:22-0.15:038:24First Quarter14Wed
15Thu9:527.210:247.94:010.14:22-0.15:038:25Waxing Gibbous15Thu
16Fri10:577.211:218.15:06-0.15:22-0.15:038:25Waxing Gibbous16Fri
17Sat11:577.36:06-0.56:19-0.15:038:25Waxing Gibbous17Sat
18Sun12:158.312:547.47:03-0.77:13-0.15:048:26Full Moon18Sun
19Mon1:088.51:497.47:56-0.98:05-0.15:048:26Full Moon19Mon
20Tue1:598.52:417.48:47-0.98:560.05:048:26Full Moon20Tue
21Wed2:498.43:317.39:37-0.89:450.25:048:26Waning Gibbous21Wed
22Thu3:378.24:197.210:24-0.610:340.45:048:26Waning Gibbous22Thu
23Fri4:257.95:077.011:11-0.411:220.65:058:27Waning Gibbous23Fri
24Sat5:127.55:566.911:58-0.15:058:27Waning Gibbous24Sat
25Sun6:027.26:456.712:130.812:450.25:058:27Third Quarter25Sun
26Mon6:536.87:346.71:051.01:320.55:068:27Third Quarter26Mon
27Tue7:456.58:226.61:581.22:200.85:068:27Third Quarter27Tue
28Wed8:386.39:126.72:521.23:080.95:078:27Third Quarter28Wed
29Thu9:346.210:026.73:481.23:581.15:078:27Waning Crescent29Thu
30Fri10:306.110:506.94:441.14:491.15:088:27Waning Crescent30Fri
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 8:08 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 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