Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Saturday, August 22, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 4h 16m at 1:36 pm (1.9 ft)
Next high tide : 7:57 pm (8.0 ft)
Sunset today : 7:34 pm
Sunrise tomorrow : 5:56 am
Moon phase : Waxing Gibbous (73% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Feb 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:458.14:107.410:000.710:111.06:584:54First Quarter1Wed
2Thu4:317.95:027.010:531.010:591.46:574:56First Quarter2Thu
3Fri5:207.75:586.711:491.211:511.76:564:57First Quarter3Fri
4Sat6:137.66:576.512:471.26:554:58Waxing Gibbous4Sat
5Sun7:097.77:556.612:471.81:451.16:535:00Waxing Gibbous5Sun
6Mon8:047.88:486.71:421.82:370.96:525:01Waxing Gibbous6Mon
7Tue8:538.19:357.02:331.63:230.66:515:02Waxing Gibbous7Tue
8Wed9:398.410:177.33:201.34:050.36:505:04Full Moon8Wed
9Thu10:218.710:567.64:030.94:420.06:485:05Full Moon9Thu
10Fri11:018.911:337.94:440.65:19-0.26:475:06Full Moon10Fri
11Sat11:419.05:250.35:55-0.36:465:08Full Moon11Sat
12Sun12:108.312:228.96:060.06:32-0.46:445:09Waning Gibbous12Sun
13Mon12:488.51:048.86:50-0.27:12-0.46:435:10Waning Gibbous13Mon
14Tue1:288.81:498.67:36-0.37:55-0.26:425:12Waning Gibbous14Tue
15Wed2:128.92:398.28:25-0.28:420.06:405:13Waning Gibbous15Wed
16Thu3:008.93:347.89:21-0.19:340.46:395:14Third Quarter16Thu
17Fri3:558.84:367.510:220.110:340.76:375:16Third Quarter17Fri
18Sat4:578.65:467.211:290.211:400.96:365:17Third Quarter18Sat
19Sun6:068.67:007.212:400.26:345:18Waning Crescent19Sun
20Mon7:188.78:127.412:510.91:510.06:335:20Waning Crescent20Mon
21Tue8:279.09:147.82:010.72:54-0.36:315:21Waning Crescent21Tue
22Wed9:279.310:088.23:040.43:50-0.66:305:22Waning Crescent22Wed
23Thu10:219.510:578.64:000.04:39-0.86:285:23New Moon23Thu
24Fri11:109.511:418.84:51-0.35:24-0.96:275:25New Moon24Fri
25Sat11:569.45:38-0.56:06-0.76:255:26New Moon25Sat
26Sun12:238.912:399.16:23-0.56:46-0.46:245:27Waxing Crescent26Sun
27Mon1:018.81:208.77:06-0.37:240.06:225:29Waxing Crescent27Mon
28Tue1:398.72:018.27:48-0.18:020.46:205:30Waxing Crescent28Tue
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 4:46 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 73% 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 Gibbous (73% 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