Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Monday, August 10, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 3h 16m at 3:33 am (-0.2 ft)
Next high tide : 9:49 am (7.8 ft)
Sunset today : 7:52 pm
Sunrise tomorrow : 5:43 am
Moon phase : Waning Crescent (6% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Dec 2097

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:309.110:038.23:110.43:49-0.26:554:08Waning Crescent1Sun
2Mon10:129.210:478.13:550.64:33-0.36:564:08New Moon2Mon
3Tue10:519.111:287.94:360.75:14-0.36:574:08New Moon3Tue
4Wed11:289.05:140.95:52-0.16:584:08New Moon4Wed
5Thu12:077.812:048.85:511.06:300.06:594:08New Moon5Thu
6Fri12:457.612:418.76:281.27:070.27:004:07Waxing Crescent6Fri
7Sat1:237.51:198.57:061.47:450.47:014:07Waxing Crescent7Sat
8Sun2:027.31:598.37:451.58:240.57:024:07Waxing Crescent8Sun
9Mon2:447.32:428.28:291.69:070.77:034:07Waxing Crescent9Mon
10Tue3:277.33:308.09:161.69:510.87:044:07First Quarter10Tue
11Wed4:137.34:207.810:071.610:370.97:044:08First Quarter11Wed
12Thu5:007.55:137.611:011.511:250.97:054:08First Quarter12Thu
13Fri5:497.86:107.611:581.27:064:08First Quarter13Fri
14Sat6:398.17:087.612:160.912:560.87:074:08Waxing Gibbous14Sat
15Sun7:308.68:057.71:080.81:530.37:074:08Waxing Gibbous15Sun
16Mon8:219.19:007.92:010.62:48-0.27:084:09Waxing Gibbous16Mon
17Tue9:119.59:538.12:530.43:40-0.77:094:09Full Moon17Tue
18Wed10:029.910:478.33:450.24:33-1.07:094:09Full Moon18Wed
19Thu10:5510.111:418.44:370.05:25-1.37:104:10Full Moon19Thu
20Fri11:4910.25:30-0.16:18-1.37:104:10Waning Gibbous20Fri
21Sat12:368.512:4510.16:25-0.17:12-1.27:114:11Waning Gibbous21Sat
22Sun1:328.51:429.87:210.08:07-1.07:114:11Waning Gibbous22Sun
23Mon2:308.52:429.48:210.29:04-0.77:124:12Waning Gibbous23Mon
24Tue3:298.43:449.09:250.310:03-0.37:124:12Third Quarter24Tue
25Wed4:298.44:488.510:300.511:020.07:124:13Third Quarter25Wed
26Thu5:288.55:538.111:360.57:134:14Third Quarter26Thu
27Fri6:278.56:577.812:010.412:420.57:134:15Waning Crescent27Fri
28Sat7:248.67:597.712:590.61:440.37:134:15Waning Crescent28Sat
29Sun8:178.78:547.61:540.82:400.27:134:16Waning Crescent29Sun
30Mon9:058.79:437.62:450.93:290.17:144:17Waning Crescent30Mon
31Tue9:498.810:237.53:311.04:140.07:144:18New Moon31Tue
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 6:41 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 6% 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 (6% 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