Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Saturday, July 18, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 9:30 pm (0.2 ft)
Next high tide : in 7m at 3:31 pm (9.0 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 5:20 am
Moon phase : Waxing Crescent (23% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Feb 1983

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue1:459.12:029.77:43-0.78:16-1.16:584:54Waning Gibbous1Tue
2Wed2:379.12:579.18:39-0.59:08-0.66:574:55Waning Gibbous2Wed
3Thu3:308.93:548.69:38-0.110:02-0.16:564:57Third Quarter3Thu
4Fri4:258.74:538.010:380.210:570.46:554:58Third Quarter4Fri
5Sat5:208.45:547.511:390.411:530.96:534:59Third Quarter5Sat
6Sun6:178.26:567.212:410.66:525:01Third Quarter6Sun
7Mon7:158.17:567.112:511.21:420.66:515:02Waning Crescent7Mon
8Tue8:098.18:497.11:481.32:370.56:505:03Waning Crescent8Tue
9Wed8:588.29:367.22:391.23:240.46:485:05Waning Crescent9Wed
10Thu9:428.410:187.43:251.14:070.36:475:06Waning Crescent10Thu
11Fri10:228.510:577.54:071.04:450.26:465:08New Moon11Fri
12Sat11:008.611:327.74:450.85:200.16:455:09New Moon12Sat
13Sun11:368.75:210.75:530.06:435:10New Moon13Sun
14Mon12:077.812:128.75:570.66:250.06:425:11New Moon14Mon
15Tue12:407.912:488.66:330.56:580.06:405:13Waxing Crescent15Tue
16Wed1:148.01:258.47:110.47:330.16:395:14Waxing Crescent16Wed
17Thu1:498.12:058.27:520.48:110.26:385:15Waxing Crescent17Thu
18Fri2:278.22:498.08:360.48:530.46:365:17Waxing Crescent18Fri
19Sat3:118.33:397.79:260.49:410.66:355:18First Quarter19Sat
20Sun4:008.34:357.410:220.410:360.86:335:19First Quarter20Sun
21Mon4:568.45:387.311:240.411:370.96:325:21First Quarter21Mon
22Tue5:598.56:487.312:310.36:305:22Waxing Gibbous22Tue
23Wed7:078.77:577.612:430.81:390.06:285:23Waxing Gibbous23Wed
24Thu8:149.19:008.01:510.52:43-0.56:275:25Waxing Gibbous24Thu
25Fri9:169.69:588.52:540.13:41-1.06:255:26Waxing Gibbous25Fri
26Sat10:139.910:528.93:52-0.44:34-1.36:245:27Full Moon26Sat
27Sun11:0810.111:439.34:48-0.85:25-1.56:225:28Full Moon27Sun
28Mon12:0010.15:41-1.16:13-1.56:205:30Full Moon28Mon
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 6:30 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 Seavey Island, NH?

Seavey Island, 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 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 Waxing Crescent (23% illuminated). This places Seavey Island, 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