Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

33°
H -°
L 32°
NW
2mph
High tide
5:27 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Sunday, October 18, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 11:14 am (2.0 ft)
Next high tide : in 3h 31m at 5:27 am (6.9 ft)
Sunset today : 5:55 pm
Sunrise tomorrow : 7:00 am
Moon phase : First Quarter (50% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Dec 1821

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:357.53:408.39:261.310:030.46:584:13First Quarter1Sat
2Sun4:267.84:378.210:241.210:560.47:004:13First Quarter2Sun
3Mon5:198.15:388.111:250.911:500.47:014:12First Quarter3Mon
4Tue6:138.56:418.112:270.57:024:12Waxing Gibbous4Tue
5Wed7:099.07:438.212:460.31:290.07:034:12Waxing Gibbous5Wed
6Thu8:049.58:438.41:430.12:29-0.67:044:12Waxing Gibbous6Thu
7Fri8:589.99:408.52:380.03:25-1.07:054:12Full Moon7Fri
8Sat9:5110.210:358.63:32-0.14:19-1.37:064:12Full Moon8Sat
9Sun10:4410.311:308.64:25-0.25:12-1.47:064:12Full Moon9Sun
10Mon11:3710.35:17-0.16:04-1.37:074:12Full Moon10Mon
11Tue12:238.512:3010.06:100.06:56-1.17:084:12Waning Gibbous11Tue
12Wed1:168.41:239.67:030.27:48-0.77:094:12Waning Gibbous12Wed
13Thu2:098.22:179.27:570.58:41-0.37:104:12Waning Gibbous13Thu
14Fri3:038.03:128.68:540.89:340.27:114:12Third Quarter14Fri
15Sat3:577.94:098.19:541.110:270.67:114:12Third Quarter15Sat
16Sun4:507.85:077.710:541.311:191.07:124:13Third Quarter16Sun
17Mon5:437.86:067.311:541.37:134:13Third Quarter17Mon
18Tue6:367.87:057.112:111.312:541.27:134:13Waning Crescent18Tue
19Wed7:267.98:017.01:031.51:501.17:144:14Waning Crescent19Wed
20Thu8:148.18:527.01:531.62:410.97:154:14Waning Crescent20Thu
21Fri8:588.29:397.12:391.63:270.77:154:15Waning Crescent21Fri
22Sat9:408.410:227.23:221.54:090.57:164:15New Moon22Sat
23Sun10:208.511:037.34:031.44:480.37:164:16New Moon23Sun
24Mon10:598.711:437.34:421.35:260.17:164:16New Moon24Mon
25Tue11:388.85:211.26:030.07:174:17New Moon25Tue
26Wed12:217.412:178.86:001.16:41-0.17:174:18Waxing Crescent26Wed
27Thu1:007.512:588.86:411.07:20-0.17:184:18Waxing Crescent27Thu
28Fri1:397.71:418.87:250.98:01-0.17:184:19Waxing Crescent28Fri
29Sat2:217.92:278.68:130.88:46-0.17:184:20Waxing Crescent29Sat
30Sun3:078.13:188.49:050.79:330.07:184:20First Quarter30Sun
31Mon3:558.34:148.210:020.510:200.17:184:21First Quarter31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

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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 neap phase. Tonight's moon is 50% 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 (50% 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

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