Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Sunday, August 9, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 2:34 pm (0.9 ft)
Next high tide : in 1h 40m at 8:43 am (7.5 ft)
Sunset today : 7:54 pm
Sunrise tomorrow : 5:42 am
Moon phase : Waning Crescent (13% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Jul 2096

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:197.29:308.33:111.03:121.65:088:26Waxing Gibbous1Sun
2Mon10:087.310:138.53:580.83:561.65:088:25Waxing Gibbous2Mon
3Tue10:537.310:538.64:420.64:381.55:098:25Waxing Gibbous3Tue
4Wed11:367.411:338.85:220.55:181.55:108:25Full Moon4Wed
5Thu12:177.56:010.35:571.45:108:25Full Moon5Thu
6Fri12:138.912:577.66:400.26:371.35:118:24Full Moon6Fri
7Sat12:539.01:367.77:180.17:181.15:128:24Waning Gibbous7Sat
8Sun1:349.02:167.87:570.08:011.05:128:23Waning Gibbous8Sun
9Mon2:169.02:588.08:370.08:470.95:138:23Waning Gibbous9Mon
10Tue3:018.93:428.29:200.09:370.85:148:22Waning Gibbous10Tue
11Wed3:508.84:298.510:060.010:320.75:158:22Third Quarter11Wed
12Thu4:438.55:198.710:560.111:300.55:158:21Third Quarter12Thu
13Fri5:408.36:138.911:490.25:168:21Third Quarter13Fri
14Sat6:428.17:109.212:310.412:460.45:178:20Third Quarter14Sat
15Sun7:478.08:119.41:350.21:460.55:188:19Waning Crescent15Sun
16Mon8:538.09:119.62:40-0.12:480.55:198:19Waning Crescent16Mon
17Tue9:578.110:109.93:42-0.43:480.45:208:18Waning Crescent17Tue
18Wed10:578.311:0710.04:40-0.74:460.35:218:17New Moon18Wed
19Thu11:538.45:36-0.95:410.25:228:16New Moon19Thu
20Fri12:0210.012:478.56:28-1.06:340.25:238:15New Moon20Fri
21Sat12:559.91:388.57:18-0.97:260.35:248:15Waxing Crescent21Sat
22Sun1:469.72:268.58:06-0.68:170.45:258:14Waxing Crescent22Sun
23Mon2:359.33:138.48:53-0.39:070.65:258:13Waxing Crescent23Mon
24Tue3:238.93:598.39:390.19:590.95:268:12Waxing Crescent24Tue
25Wed4:128.44:458.210:240.510:511.15:278:11First Quarter25Wed
26Thu5:017.95:308.111:100.911:431.25:288:10First Quarter26Thu
27Fri5:527.56:178.011:561.35:308:09First Quarter27Fri
28Sat6:457.27:058.012:371.312:441.65:318:08First Quarter28Sat
29Sun7:417.07:568.01:321.31:351.85:328:06Waxing Gibbous29Sun
30Mon8:376.98:468.12:271.22:261.85:338:05Waxing Gibbous30Mon
31Tue9:307.09:358.33:191.13:161.85:348:04Waxing Gibbous31Tue
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 11:38 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 13% 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 Waning Crescent (13% 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