Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Wednesday, July 29, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide (tomorrow) : 6:37 am (0.3 ft)
Next high tide (tomorrow) : in 5h 04m at 12:15 am (8.8 ft)
Sunset today : 8:08 pm
Sunrise tomorrow : 5:30 am
Moon phase : Full Moon (100% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Jan 1972

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat11:209.84:590.05:44-1.17:144:18Full Moon1Sat
2Sun12:028.412:099.75:500.06:31-0.97:144:18Waning Gibbous2Sun
3Mon12:498.412:579.46:380.27:16-0.67:144:19Waning Gibbous3Mon
4Tue1:358.31:439.07:260.48:00-0.37:144:20Waning Gibbous4Tue
5Wed2:198.12:298.58:140.68:440.27:144:21Waning Gibbous5Wed
6Thu3:038.03:168.09:040.89:280.67:144:22Third Quarter6Thu
7Fri3:477.94:047.69:541.110:120.97:144:23Third Quarter7Fri
8Sat4:337.84:557.210:471.210:591.37:144:24Third Quarter8Sat
9Sun5:207.75:496.911:411.311:481.57:134:25Third Quarter9Sun
10Mon6:107.76:466.712:371.27:134:26Waning Crescent10Mon
11Tue7:027.87:436.712:391.61:331.17:134:27Waning Crescent11Tue
12Wed7:538.08:366.91:321.62:250.87:134:29Waning Crescent12Wed
13Thu8:428.39:257.12:221.53:120.57:124:30Waning Crescent13Thu
14Fri9:278.610:097.33:081.33:560.27:124:31New Moon14Fri
15Sat10:118.910:517.63:521.04:37-0.17:114:32New Moon15Sat
16Sun10:549.111:327.94:360.65:17-0.47:114:33New Moon16Sun
17Mon11:369.35:190.35:56-0.67:104:34New Moon17Mon
18Tue12:138.112:209.36:040.16:37-0.77:104:36Waxing Crescent18Tue
19Wed12:548.41:059.26:50-0.17:20-0.77:094:37Waxing Crescent19Wed
20Thu1:388.71:539.07:39-0.28:05-0.67:094:38Waxing Crescent20Thu
21Fri2:258.82:458.78:31-0.28:54-0.47:084:39First Quarter21Fri
22Sat3:158.93:418.39:29-0.19:470.07:074:41First Quarter22Sat
23Sun4:118.94:437.910:300.010:450.37:064:42First Quarter23Sun
24Mon5:118.85:517.611:360.111:480.67:064:43First Quarter24Mon
25Tue6:168.87:037.412:460.17:054:44Waxing Gibbous25Tue
26Wed7:248.98:127.512:550.71:54-0.17:044:46Waxing Gibbous26Wed
27Thu8:299.19:157.82:020.62:57-0.47:034:47Waxing Gibbous27Thu
28Fri9:279.310:108.03:030.43:52-0.67:024:48Full Moon28Fri
29Sat10:219.411:008.23:580.24:42-0.87:014:50Full Moon29Sat
30Sun11:099.411:458.34:490.15:28-0.87:004:51Full Moon30Sun
31Mon11:549.35:360.06:10-0.76:594:52Full Moon31Mon
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 3:26 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 100% 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 Full Moon (100% 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