Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

53°
H 53°
L 36°
S
8mph
High tide
5:31 pm
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 (tomorrow) : 12:01 am (1.3 ft)
Next high tide : in 3h 21m at 5:31 pm (7.8 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 - Jan 1821

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon8:458.49:297.12:241.53:150.57:184:22Waning Crescent1Mon
2Tue9:308.710:157.33:111.34:000.17:194:23New Moon2Tue
3Wed10:159.011:007.63:561.04:44-0.37:194:24New Moon3Wed
4Thu10:599.311:437.84:410.75:27-0.67:184:25New Moon4Thu
5Fri11:459.55:270.46:10-0.87:184:26New Moon5Fri
6Sat12:288.112:329.66:140.26:54-0.97:184:27Waxing Crescent6Sat
7Sun1:138.31:209.57:030.07:40-0.97:184:28Waxing Crescent7Sun
8Mon2:008.52:119.37:550.08:28-0.77:184:29Waxing Crescent8Mon
9Tue2:498.73:068.98:510.09:19-0.57:184:30First Quarter9Tue
10Wed3:418.84:058.59:500.010:13-0.17:174:31First Quarter10Wed
11Thu4:378.95:078.010:530.111:100.27:174:32First Quarter11Thu
12Fri5:358.96:137.711:580.17:174:34First Quarter12Fri
13Sat6:378.97:227.512:100.51:050.17:164:35Waxing Gibbous13Sat
14Sun7:408.98:277.51:120.72:100.07:164:36Waxing Gibbous14Sun
15Mon8:409.09:267.52:140.83:09-0.27:154:37Waxing Gibbous15Mon
16Tue9:359.110:207.73:110.74:03-0.37:154:38Full Moon16Tue
17Wed10:269.211:087.84:040.74:52-0.47:144:39Full Moon17Wed
18Thu11:139.111:527.84:520.65:36-0.47:144:41Full Moon18Thu
19Fri11:569.05:380.66:17-0.37:134:42Full Moon19Fri
20Sat12:337.812:378.86:200.66:55-0.17:134:43Waning Gibbous20Sat
21Sun1:117.81:178.57:020.77:320.17:124:44Waning Gibbous21Sun
22Mon1:497.81:578.27:440.88:090.47:114:46Waning Gibbous22Mon
23Tue2:267.82:387.88:270.98:470.77:104:47Waning Gibbous23Tue
24Wed3:067.83:227.49:121.19:271.07:104:48Third Quarter24Wed
25Thu3:487.74:117.110:001.210:101.37:094:50Third Quarter25Thu
26Fri4:337.75:036.710:521.310:581.57:084:51Third Quarter26Fri
27Sat5:227.66:006.511:481.311:501.77:074:52Third Quarter27Sat
28Sun6:157.77:026.512:481.27:064:54Waning Crescent28Sun
29Mon7:127.98:026.612:461.71:460.97:054:55Waning Crescent29Mon
30Tue8:088.28:566.91:441.52:410.57:044:56Waning Crescent30Tue
31Wed9:008.79:467.32:381.23:310.17:034:57Waning Crescent31Wed
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 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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