Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Friday, July 24, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide (tomorrow) : 3:12 am (1.0 ft)
Next high tide : in 1h 37m at 8:39 pm (8.3 ft)
Sunset today : 8:13 pm
Sunrise tomorrow : 5:25 am
Moon phase : Waxing Gibbous (79% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Jan 2071

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu11:068.811:407.84:520.75:27-0.17:144:18New Moon1Thu
2Fri11:428.85:280.76:02-0.17:144:19New Moon2Fri
3Sat12:167.812:178.86:040.76:36-0.17:144:20Waxing Crescent3Sat
4Sun12:527.812:548.76:400.77:100.07:144:21Waxing Crescent4Sun
5Mon1:287.91:328.57:190.77:470.17:144:22Waxing Crescent5Mon
6Tue2:057.92:138.48:000.88:260.27:144:23Waxing Crescent6Tue
7Wed2:468.02:588.28:450.89:090.37:134:24First Quarter7Wed
8Thu3:308.13:478.09:360.79:570.47:134:25First Quarter8Thu
9Fri4:198.24:427.810:310.710:500.47:134:26First Quarter9Fri
10Sat5:128.45:427.711:300.511:470.57:134:27First Quarter10Sat
11Sun6:108.66:467.712:340.37:124:28Waxing Gibbous11Sun
12Mon7:119.07:527.912:480.41:38-0.17:124:29Waxing Gibbous12Mon
13Tue8:139.48:548.31:500.12:39-0.67:124:31Waxing Gibbous13Tue
14Wed9:119.89:528.62:50-0.23:37-1.27:114:32Full Moon14Wed
15Thu10:0810.210:489.03:48-0.64:31-1.67:114:33Full Moon15Thu
16Fri11:0310.411:439.24:43-0.85:24-1.87:104:34Full Moon16Fri
17Sat11:5710.45:38-1.06:16-1.87:104:35Full Moon17Sat
18Sun12:369.412:5110.26:32-1.07:07-1.67:094:37Waning Gibbous18Sun
19Mon1:289.31:449.87:26-0.87:58-1.37:084:38Waning Gibbous19Mon
20Tue2:209.22:399.38:21-0.68:50-0.87:084:39Waning Gibbous20Tue
21Wed3:139.03:358.89:18-0.29:44-0.37:074:40Third Quarter21Wed
22Thu4:078.74:328.210:170.110:380.27:064:42Third Quarter22Thu
23Fri5:028.55:317.711:170.411:340.67:054:43Third Quarter23Fri
24Sat5:588.36:317.412:180.67:054:44Third Quarter24Sat
25Sun6:548.27:307.212:300.91:170.77:044:46Waning Crescent25Sun
26Mon7:488.28:247.21:261.12:130.67:034:47Waning Crescent26Mon
27Tue8:388.39:137.32:181.13:020.57:024:48Waning Crescent27Tue
28Wed9:228.49:567.53:051.03:450.37:014:49Waning Crescent28Wed
29Thu10:038.510:367.73:470.94:240.17:004:51New Moon29Thu
30Fri10:418.711:137.84:260.75:000.06:594:52New Moon30Fri
31Sat11:188.711:497.95:030.65:34-0.16:584:53New Moon31Sat
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 11:55 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 transitional phase. Tonight's moon is 79% 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 shifting between spring and neap.

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 (79% illuminated). This places Seavey Island, NH in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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