Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide (tomorrow) : in 43m at 12:22 am (0.8 ft)
Next high tide (tomorrow) : 6:33 am (7.6 ft)
Sunset today : 8:15 pm
Sunrise tomorrow : 5:22 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Nov 1981

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:497.71:518.47:381.38:130.66:174:35Waxing Crescent1Sun
2Mon2:317.52:338.38:191.58:560.76:194:33Waxing Crescent2Mon
3Tue3:177.43:208.19:051.69:440.86:204:32First Quarter3Tue
4Wed4:077.34:128.09:561.710:360.96:214:31First Quarter4Wed
5Thu4:597.35:078.010:521.611:300.96:224:30First Quarter5Thu
6Fri5:537.56:068.111:501.46:244:28First Quarter6Fri
7Sat6:487.97:058.312:250.712:501.06:254:27Waxing Gibbous7Sat
8Sun7:418.48:038.61:200.41:490.56:264:26Waxing Gibbous8Sun
9Mon8:319.08:578.92:120.12:44-0.16:284:25Waxing Gibbous9Mon
10Tue9:209.69:509.23:03-0.33:36-0.76:294:24Full Moon10Tue
11Wed10:0910.010:429.33:52-0.54:27-1.26:304:23Full Moon11Wed
12Thu10:5810.411:359.44:42-0.75:19-1.56:314:22Full Moon12Thu
13Fri11:4910.55:32-0.76:11-1.66:334:21Waning Gibbous13Fri
14Sat12:299.312:4210.46:24-0.67:05-1.56:344:20Waning Gibbous14Sat
15Sun1:259.11:3710.17:18-0.38:01-1.26:354:19Waning Gibbous15Sun
16Mon2:238.82:369.78:150.19:01-0.86:364:18Waning Gibbous16Mon
17Tue3:258.53:399.39:170.410:03-0.46:384:17Third Quarter17Tue
18Wed4:298.34:448.910:230.711:06-0.16:394:16Third Quarter18Wed
19Thu5:328.35:508.611:300.86:404:16Third Quarter19Thu
20Fri6:348.36:548.412:080.212:360.86:414:15Waning Crescent20Fri
21Sat7:328.47:548.31:080.31:380.76:434:14Waning Crescent21Sat
22Sun8:248.68:478.22:020.42:330.56:444:13Waning Crescent22Sun
23Mon9:098.79:348.22:500.53:210.36:454:13Waning Crescent23Mon
24Tue9:508.810:178.13:330.64:040.16:464:12New Moon24Tue
25Wed10:268.910:568.14:120.74:430.06:474:11New Moon25Wed
26Thu11:018.811:338.04:480.85:200.06:494:11New Moon26Thu
27Fri11:358.85:220.95:550.06:504:10New Moon27Fri
28Sat12:107.912:098.85:571.06:300.16:514:10Waxing Crescent28Sat
29Sun12:467.812:458.76:321.17:070.26:524:10Waxing Crescent29Sun
30Mon1:247.61:238.67:091.27:450.36:534:09Waxing Crescent30Mon
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 3:27 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 neap phase. Tonight's moon is 52% 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 (52% 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