Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

62°
H -°
L 51°
ESE
3mph
High tide
8:10 pm
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Monday, September 21, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide (tomorrow) : 2:40 am (1.2 ft)
Next high tide : in 1h 31m at 8:10 pm (7.9 ft)
Sunset today : 6:42 pm
Sunrise tomorrow : 6:29 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Aug 1870

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon1:369.52:118.97:51-0.68:110.14:377:08Waxing Crescent1Mon
2Tue2:279.33:009.08:39-0.59:060.04:387:07First Quarter2Tue
3Wed3:219.03:539.19:31-0.310:050.04:397:06First Quarter3Wed
4Thu4:198.64:499.210:250.011:060.14:407:05First Quarter4Thu
5Fri5:218.35:489.211:230.34:417:03First Quarter5Fri
6Sat6:278.16:509.312:110.112:240.54:427:02Waxing Gibbous6Sat
7Sun7:348.07:539.41:160.01:270.54:437:01Waxing Gibbous7Sun
8Mon8:378.18:529.52:19-0.22:280.54:446:59Waxing Gibbous8Mon
9Tue9:358.29:479.63:18-0.43:250.44:456:58Full Moon9Tue
10Wed10:288.410:399.64:11-0.54:170.34:466:57Full Moon10Wed
11Thu11:178.511:279.65:00-0.55:070.34:476:55Full Moon11Thu
12Fri12:038.55:45-0.55:540.34:496:54Full Moon12Fri
13Sat12:129.412:458.56:28-0.36:390.44:506:52Waning Gibbous13Sat
14Sun12:559.11:268.47:08-0.17:220.54:516:51Waning Gibbous14Sun
15Mon1:388.72:068.37:480.38:070.74:526:49Waning Gibbous15Mon
16Tue2:208.42:478.28:290.68:530.94:536:48Waning Gibbous16Tue
17Wed3:058.03:298.19:110.99:411.14:546:46Third Quarter17Wed
18Thu3:537.64:158.09:551.210:321.34:556:45Third Quarter18Thu
19Fri4:447.35:037.910:421.511:251.44:566:43Third Quarter19Fri
20Sat5:387.15:557.911:331.74:576:42Third Quarter20Sat
21Sun6:367.06:508.012:211.412:261.84:586:40Waning Crescent21Sun
22Mon7:347.07:448.21:181.21:221.75:006:39Waning Crescent22Mon
23Tue8:287.28:358.52:120.92:141.45:016:37Waning Crescent23Tue
24Wed9:167.69:238.93:010.63:041.15:026:35Waning Crescent24Wed
25Thu10:027.910:099.33:460.13:510.75:036:34New Moon25Thu
26Fri10:458.310:559.64:29-0.24:370.25:046:32New Moon26Fri
27Sat11:298.711:429.75:12-0.65:24-0.15:056:30New Moon27Sat
28Sun12:129.15:56-0.86:12-0.45:066:29Waxing Crescent28Sun
29Mon12:299.812:579.46:40-0.87:01-0.65:076:27Waxing Crescent29Mon
30Tue1:189.61:459.57:26-0.77:53-0.65:086:25Waxing Crescent30Tue
31Wed2:109.32:359.58:16-0.58:48-0.55:096:24Waxing Crescent31Wed
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 transitional phase. Tonight's moon is 75% 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 (75% 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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