Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

57°
H -°
L 46°
NNW
6mph
Low tide
2:19 am
Photo Credits

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

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : in 3h 32m at 2:19 am (1.1 ft)
Next high tide (tomorrow) : 8:15 am (5.7 ft)
Sunset today : 6:48 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

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Squamscott River, Great Bay, NH Tides - Jul 1939

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat1:367.72:156.88:25-0.28:270.65:078:26Full Moon1Sat
2Sun2:197.72:576.89:07-0.19:090.75:088:26Full Moon2Sun
3Mon3:007.63:376.89:45-0.19:490.85:088:26Full Moon3Mon
4Tue3:397.54:156.710:220.010:280.85:098:26Waning Gibbous4Tue
5Wed4:177.34:536.710:580.211:080.95:098:26Waning Gibbous5Wed
6Thu4:567.15:326.711:350.311:501.05:108:25Waning Gibbous6Thu
7Fri5:376.96:126.712:130.55:118:25Waning Gibbous7Fri
8Sat6:216.76:546.712:341.012:540.65:118:25Third Quarter8Sat
9Sun7:076.47:386.81:211.11:370.85:128:24Third Quarter9Sun
10Mon7:576.38:246.92:101.12:230.95:138:24Third Quarter10Mon
11Tue8:506.29:147.03:031.03:130.95:138:23Third Quarter11Tue
12Wed9:476.210:087.33:590.84:070.95:148:23Waning Crescent12Wed
13Thu10:466.311:027.64:570.55:030.75:158:22Waning Crescent13Thu
14Fri11:426.611:558.05:520.15:580.55:168:22Waning Crescent14Fri
15Sat12:366.96:45-0.36:510.15:178:21New Moon15Sat
16Sun12:488.31:287.27:37-0.77:45-0.25:188:21New Moon16Sun
17Mon1:408.62:217.68:28-1.08:38-0.45:188:20New Moon17Mon
18Tue2:348.73:137.89:18-1.29:32-0.65:198:19Waxing Crescent18Tue
19Wed3:278.74:048.010:09-1.310:27-0.65:208:18Waxing Crescent19Wed
20Thu4:208.64:578.111:00-1.211:23-0.65:218:18Waxing Crescent20Thu
21Fri5:168.35:528.111:53-0.95:228:17Waxing Crescent21Fri
22Sat6:147.96:498.012:22-0.412:48-0.65:238:16First Quarter22Sat
23Sun7:167.47:477.81:23-0.21:45-0.25:248:15First Quarter23Sun
24Mon8:197.08:467.62:260.02:440.25:258:14First Quarter24Mon
25Tue9:236.79:477.53:320.23:450.55:268:13Waxing Gibbous25Tue
26Wed10:276.510:477.54:370.24:480.75:278:12Waxing Gibbous26Wed
27Thu11:276.511:427.55:390.25:460.85:288:11Waxing Gibbous27Thu
28Fri12:216.56:330.26:380.85:298:10Waxing Gibbous28Fri
29Sat12:327.51:096.67:210.17:250.75:308:09Full Moon29Sat
30Sun1:177.51:536.78:050.18:080.75:318:08Full Moon30Sun
31Mon1:597.52:336.78:440.18:480.75:328:07Full Moon31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8422687)

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Common Questions About Squamscott River, Great Bay, NH Tides

Collapse All
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

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