Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide (tomorrow) : 12:22 am (0.8 ft)
Next high tide : in 5h 11m at 6:03 pm (8.6 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 - Jun 1982

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue8:258.48:578.82:090.62:320.45:068:15Waxing Gibbous1Tue
2Wed9:238.39:468.93:080.43:250.55:058:16Waxing Gibbous2Wed
3Thu10:158.210:319.04:010.24:120.65:058:16Waxing Gibbous3Thu
4Fri11:018.211:119.04:480.14:540.85:048:17Full Moon4Fri
5Sat11:448.111:489.05:300.05:330.95:048:18Full Moon5Sat
6Sun12:238.06:090.06:111.05:048:18Full Moon6Sun
7Mon12:249.01:017.96:470.06:471.15:038:19Full Moon7Mon
8Tue12:598.91:397.87:230.17:231.35:038:20Full Moon8Tue
9Wed1:358.82:167.77:590.28:001.45:038:20Waning Gibbous9Wed
10Thu2:128.72:557.68:360.38:391.55:038:21Waning Gibbous10Thu
11Fri2:528.63:367.69:150.49:211.55:028:21Waning Gibbous11Fri
12Sat3:348.44:197.69:560.510:081.55:028:22Waning Gibbous12Sat
13Sun4:218.35:047.710:410.610:591.45:028:23Third Quarter13Sun
14Mon5:118.25:517.911:280.611:531.35:028:23Third Quarter14Mon
15Tue6:048.16:418.212:180.75:028:23Third Quarter15Tue
16Wed7:018.07:338.612:501.01:100.65:028:24Waning Crescent16Wed
17Thu8:008.18:279.01:490.72:050.55:028:24Waning Crescent17Thu
18Fri9:008.29:219.52:490.23:010.35:028:25Waning Crescent18Fri
19Sat9:598.410:149.93:46-0.33:560.15:028:25Waning Crescent19Sat
20Sun10:568.611:0810.34:42-0.84:50-0.15:038:25New Moon20Sun
21Mon11:528.85:36-1.25:44-0.25:038:25New Moon21Mon
22Tue12:0310.412:498.96:30-1.46:39-0.25:038:26New Moon22Tue
23Wed12:5810.51:459.07:25-1.47:35-0.25:038:26Waxing Crescent23Wed
24Thu1:5510.32:428.98:19-1.38:320.05:048:26Waxing Crescent24Thu
25Fri2:5210.03:408.99:15-1.09:320.25:048:26Waxing Crescent25Fri
26Sat3:529.64:388.810:12-0.710:340.45:048:26First Quarter26Sat
27Sun4:529.25:368.811:10-0.311:370.65:058:26First Quarter27Sun
28Mon5:538.76:338.712:070.15:058:26First Quarter28Mon
29Tue6:548.37:288.712:400.71:030.45:068:26First Quarter29Tue
30Wed7:558.08:228.71:410.71:580.75:068:26Waxing Gibbous30Wed
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 9:12 pm — 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