Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Sunday, August 23, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 1h 25m at 2:33 am (1.2 ft)
Next high tide : 8:44 am (6.8 ft)
Sunset today : 7:33 pm
Sunrise tomorrow : 5:57 am
Moon phase : Waxing Gibbous (81% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Feb 1932

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:208.77:097.312:510.16:594:53Waning Crescent1Mon
2Tue7:288.88:197.41:000.92:000.06:584:55Waning Crescent2Tue
3Wed8:338.99:207.62:060.83:02-0.26:574:56Waning Crescent3Wed
4Thu9:319.110:147.83:060.73:56-0.46:554:57Waning Crescent4Thu
5Fri10:229.211:027.94:000.54:45-0.56:544:59New Moon5Fri
6Sat11:099.211:458.14:490.35:29-0.56:535:00New Moon6Sat
7Sun11:529.15:340.36:09-0.46:525:01New Moon7Sun
8Mon12:258.112:328.96:160.36:46-0.26:515:03Waxing Crescent8Mon
9Tue1:018.11:108.66:570.47:210.16:495:04Waxing Crescent9Tue
10Wed1:368.11:488.27:360.57:560.46:485:05Waxing Crescent10Wed
11Thu2:118.02:277.98:160.68:320.76:475:07Waxing Crescent11Thu
12Fri2:487.93:107.58:590.89:101.06:455:08First Quarter12Fri
13Sat3:277.83:567.19:441.09:521.46:445:09First Quarter13Sat
14Sun4:117.74:476.810:341.110:391.66:435:11First Quarter14Sun
15Mon5:017.65:436.511:301.211:321.86:415:12First Quarter15Mon
16Tue5:567.66:446.412:301.26:405:13First Quarter16Tue
17Wed6:557.87:456.612:301.81:301.06:395:15Waxing Gibbous17Wed
18Thu7:548.18:416.91:291.62:260.76:375:16Waxing Gibbous18Thu
19Fri8:488.59:307.32:261.23:160.26:365:17Waxing Gibbous19Fri
20Sat9:388.910:167.93:180.74:02-0.26:345:19Full Moon20Sat
21Sun10:269.311:008.44:080.24:46-0.66:335:20Full Moon21Sun
22Mon11:149.511:448.94:56-0.35:29-0.96:315:21Full Moon22Mon
23Tue12:019.65:44-0.76:13-1.16:305:23Full Moon23Tue
24Wed12:299.212:509.56:34-0.96:58-1.06:285:24Waning Gibbous24Wed
25Thu1:159.41:409.27:24-1.07:45-0.76:265:25Waning Gibbous25Thu
26Fri2:039.52:348.78:18-0.88:36-0.36:255:26Waning Gibbous26Fri
27Sat2:569.33:338.29:16-0.59:310.26:235:28Third Quarter27Sat
28Sun3:539.04:377.710:19-0.210:320.66:225:29Third Quarter28Sun
29Mon4:578.75:477.311:270.111:391.06:205:30Third Quarter29Mon
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 5:38 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 spring phase. Tonight's moon is 81% 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 maximum.

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 (81% illuminated). This places Seavey Island, NH in a spring tide cycle, so tidal ranges are near their weekly maximum 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