Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Sunday, August 23, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 2:31 pm (1.9 ft)
Next high tide : in 3h 29m at 8:44 am (6.8 ft)
Sunset today : 7:33 pm
Sunrise tomorrow : 5:57 am
Moon phase : Waxing Gibbous (81% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Oct 1931

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu1:397.71:448.37:291.38:040.75:395:26Waning Gibbous1Thu
2Fri2:207.42:258.38:091.58:500.85:405:24Waning Gibbous2Fri
3Sat3:077.13:128.28:541.79:411.05:415:22Third Quarter3Sat
4Sun3:597.04:068.29:461.810:381.05:425:20Third Quarter4Sun
5Mon4:576.95:078.210:451.811:400.95:435:19Third Quarter5Mon
6Tue5:597.16:128.411:501.65:455:17Waning Crescent6Tue
7Wed7:027.57:178.712:420.712:561.25:465:15Waning Crescent7Wed
8Thu8:008.18:189.01:410.32:000.65:475:13Waning Crescent8Thu
9Fri8:538.79:149.42:36-0.12:58-0.15:485:12Waning Crescent9Fri
10Sat9:439.410:089.63:27-0.53:52-0.75:495:10New Moon10Sat
11Sun10:329.911:019.74:16-0.84:45-1.25:505:08New Moon11Sun
12Mon11:2010.211:549.65:04-0.95:37-1.45:525:07New Moon12Mon
13Tue12:1010.35:53-0.76:29-1.45:535:05Waxing Crescent13Tue
14Wed12:479.31:0010.26:42-0.47:22-1.25:545:03Waxing Crescent14Wed
15Thu1:418.91:539.87:340.08:18-0.75:555:02Waxing Crescent15Thu
16Fri2:388.42:499.48:280.59:17-0.25:565:00First Quarter16Fri
17Sat3:397.93:508.99:281.010:200.25:584:58First Quarter17Sat
18Sun4:427.64:538.510:311.411:240.65:594:57First Quarter18Sun
19Mon5:457.45:588.211:371.66:004:55First Quarter19Mon
20Tue6:477.47:018.112:260.812:411.66:014:54Waxing Gibbous20Tue
21Wed7:437.67:578.11:240.91:411.46:024:52Waxing Gibbous21Wed
22Thu8:317.88:468.12:150.92:331.26:044:50Waxing Gibbous22Thu
23Fri9:138.19:308.12:580.93:190.96:054:49Waxing Gibbous23Fri
24Sat9:508.310:098.13:360.83:590.76:064:47Full Moon24Sat
25Sun10:248.410:478.14:110.94:360.56:074:46Full Moon25Sun
26Mon10:568.611:238.04:440.95:110.36:094:44Full Moon26Mon
27Tue11:288.65:161.05:460.36:104:43Full Moon27Tue
28Wed12:007.912:018.65:481.16:220.36:114:42Waning Gibbous28Wed
29Thu12:377.712:368.66:231.36:590.46:124:40Waning Gibbous29Thu
30Fri1:167.51:148.67:001.47:400.56:144:39Waning Gibbous30Fri
31Sat1:587.31:578.57:421.58:260.66:154:37Waning Gibbous31Sat
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 11:37 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 81% 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 Waxing Gibbous (81% 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