Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide (tomorrow) : in 3h 07m at 12:22 am (0.8 ft)
Next high tide (tomorrow) : 6:33 am (7.6 ft)
Sunset today : 8:15 pm
Sunrise tomorrow : 5:22 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Jan 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri3:007.83:098.38:560.99:270.27:144:18First Quarter1Fri
2Sat3:487.94:028.19:500.810:170.27:144:19First Quarter2Sat
3Sun4:398.15:008.010:490.711:110.37:144:20First Quarter3Sun
4Mon5:348.46:037.911:510.57:144:21First Quarter4Mon
5Tue6:338.77:097.912:100.312:560.17:144:22Waxing Gibbous5Tue
6Wed7:349.18:148.11:110.22:00-0.37:144:23Waxing Gibbous6Wed
7Thu8:339.69:158.32:110.13:00-0.87:144:24Waxing Gibbous7Thu
8Fri9:309.910:138.63:10-0.23:57-1.27:144:25Full Moon8Fri
9Sat10:2610.211:108.84:06-0.44:52-1.57:134:26Full Moon9Sat
10Sun11:2110.35:01-0.55:45-1.67:134:27Full Moon10Sun
11Mon12:048.912:1510.25:55-0.56:37-1.57:134:28Waning Gibbous11Mon
12Tue12:578.91:089.96:48-0.47:28-1.37:124:29Waning Gibbous12Tue
13Wed1:498.82:019.57:41-0.28:19-0.97:124:30Waning Gibbous13Wed
14Thu2:408.62:549.08:360.19:10-0.47:124:31Waning Gibbous14Thu
15Fri3:338.43:498.59:330.410:020.17:114:33Third Quarter15Fri
16Sat4:258.24:457.910:310.710:540.57:114:34Third Quarter16Sat
17Sun5:178.15:417.511:300.811:470.97:104:35Third Quarter17Sun
18Mon6:098.06:397.212:280.97:094:36Third Quarter18Mon
19Tue7:028.07:367.112:401.21:260.97:094:38Waning Crescent19Tue
20Wed7:538.08:297.11:321.32:190.77:084:39Waning Crescent20Wed
21Thu8:408.29:177.22:211.33:060.57:074:40Waning Crescent21Thu
22Fri9:238.410:007.33:061.23:490.37:074:41Waning Crescent22Fri
23Sat10:048.610:417.53:481.04:280.17:064:43New Moon23Sat
24Sun10:438.711:197.64:270.95:050.07:054:44New Moon24Sun
25Mon11:218.811:567.75:050.75:41-0.27:044:45New Moon25Mon
26Tue11:588.95:430.66:17-0.37:034:47New Moon26Tue
27Wed12:337.912:378.96:220.56:53-0.37:034:48Waxing Crescent27Wed
28Thu1:108.01:178.87:020.47:32-0.37:024:49Waxing Crescent28Thu
29Fri1:498.12:008.77:460.38:13-0.27:014:50Waxing Crescent29Fri
30Sat2:318.32:478.48:340.38:59-0.17:004:52Waxing Crescent30Sat
31Sun3:188.43:408.29:280.39:490.16:594:53First Quarter31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

Common Questions About Seavey Island, NH Tides

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What time does the tide turn (slack tide) in Seavey Island, NH today?

Slack tide in Seavey Island, NH is approximately 3:27 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 Seavey Island, NH?

Seavey Island, NH is currently in a neap phase. Tonight's moon is 52% 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 Seavey Island, 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 Seavey Island, NH?

Tide predictions for Seavey Island, 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 Seavey Island, NH?

Tide data for Seavey Island, NH is sourced from NOAA Station #8419870. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8419870.

What is the moon phase in Seavey Island, NH tonight?

Tonight the moon over Seavey Island, NH is First Quarter (52% illuminated). This places Seavey Island, 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