Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

62°
H -°
L 59°
NNE
1mph
High tide
4:23 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Thursday, September 17, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 10:15 am (1.5 ft)
Next high tide : in 35m at 4:23 am (7.5 ft)
Sunset today : 6:49 pm
Sunrise tomorrow : 6:24 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Jul 1875

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu9:148.29:2510.12:59-0.63:040.34:107:30New Moon1Thu
2Fri10:128.310:2110.23:57-0.84:010.24:117:29New Moon2Fri
3Sat11:098.411:1710.24:52-1.04:560.24:117:29New Moon3Sat
4Sun12:048.55:46-1.05:510.24:127:29New Moon4Sun
5Mon12:1210.112:588.56:38-0.96:450.34:137:29Waxing Crescent5Mon
6Tue1:059.81:508.57:28-0.77:390.54:137:28Waxing Crescent6Tue
7Wed1:589.42:418.48:19-0.38:350.74:147:28Waxing Crescent7Wed
8Thu2:528.93:328.39:090.19:310.94:157:28First Quarter8Thu
9Fri3:468.44:238.29:590.510:291.14:157:27First Quarter9Fri
10Sat4:417.95:138.210:490.911:261.24:167:27First Quarter10Sat
11Sun5:377.56:038.111:391.34:177:26First Quarter11Sun
12Mon6:357.26:548.112:251.312:301.64:187:26Waxing Gibbous12Mon
13Tue7:337.07:458.11:221.21:221.84:187:25Waxing Gibbous13Tue
14Wed8:287.08:348.32:161.12:131.84:197:25Waxing Gibbous14Wed
15Thu9:187.09:198.43:060.93:001.84:207:24Waxing Gibbous15Thu
16Fri10:047.110:028.63:510.73:431.74:217:23Full Moon16Fri
17Sat10:467.310:438.74:320.64:251.54:227:23Full Moon17Sat
18Sun11:277.411:238.95:110.45:051.44:237:22Full Moon18Sun
19Mon12:057.65:480.25:461.24:247:21Full Moon19Mon
20Tue12:039.012:437.86:250.16:261.04:247:20Waning Gibbous20Tue
21Wed12:439.01:218.07:020.07:090.84:257:20Waning Gibbous21Wed
22Thu1:249.02:008.37:41-0.17:540.74:267:19Waning Gibbous22Thu
23Fri2:088.92:428.58:230.08:440.54:277:18Waning Gibbous23Fri
24Sat2:578.63:288.79:070.19:370.44:287:17Third Quarter24Sat
25Sun3:498.44:178.99:560.210:340.44:297:16Third Quarter25Sun
26Mon4:468.15:119.110:480.411:350.34:307:15Third Quarter26Mon
27Tue5:477.86:099.211:450.64:317:14Waning Crescent27Tue
28Wed6:537.77:129.312:390.212:470.74:327:13Waning Crescent28Wed
29Thu8:007.78:159.51:450.01:500.74:337:12Waning Crescent29Thu
30Fri9:047.99:159.72:47-0.32:510.64:347:11Waning Crescent30Fri
31Sat10:028.110:129.83:46-0.53:500.44:357:10New Moon31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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Common Questions About Seavey Island, NH Tides

Collapse All
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 39% 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 First Quarter (39% 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

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