Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Wednesday, August 12, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 5:36 pm (-0.1 ft)
Next high tide : in 5h 18m at 11:44 am (8.6 ft)
Sunset today : 7:50 pm
Sunrise tomorrow : 5:45 am
Moon phase : New Moon (0% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Oct 1947

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed11:428.85:280.35:500.05:395:26Full Moon1Wed
2Thu12:058.612:189.06:040.36:31-0.15:405:24Waning Gibbous2Thu
3Fri12:468.512:589.16:430.47:15-0.15:415:22Waning Gibbous3Fri
4Sat1:308.31:419.17:250.58:03-0.15:425:20Waning Gibbous4Sat
5Sun2:198.02:309.08:130.78:570.15:445:18Third Quarter5Sun
6Mon3:147.83:268.99:070.99:570.35:455:17Third Quarter6Mon
7Tue4:167.64:308.810:081.111:020.45:465:15Third Quarter7Tue
8Wed5:237.55:398.711:161.25:475:13Third Quarter8Wed
9Thu6:337.76:508.812:100.312:271.15:485:12Waning Crescent9Thu
10Fri7:408.17:589.11:170.11:360.75:495:10Waning Crescent10Fri
11Sat8:408.68:589.32:18-0.22:380.25:515:08Waning Crescent11Sat
12Sun9:339.19:539.53:13-0.43:35-0.35:525:06New Moon12Sun
13Mon10:219.410:449.54:03-0.64:27-0.65:535:05New Moon13Mon
14Tue11:079.611:339.44:49-0.65:16-0.85:545:03New Moon14Tue
15Wed11:509.65:34-0.46:02-0.85:555:01New Moon15Wed
16Thu12:209.112:329.56:170.06:48-0.65:565:00Waxing Crescent16Thu
17Fri1:058.71:149.26:590.47:33-0.25:584:58Waxing Crescent17Fri
18Sat1:508.21:568.97:410.88:190.25:594:57Waxing Crescent18Sat
19Sun2:367.82:408.58:261.39:070.66:004:55Waxing Crescent19Sun
20Mon3:257.43:288.29:131.69:580.96:014:53First Quarter20Mon
21Tue4:167.24:207.910:051.910:521.26:034:52First Quarter21Tue
22Wed5:107.05:157.811:002.011:471.36:044:50First Quarter22Wed
23Thu6:057.06:127.711:582.06:054:49First Quarter23Thu
24Fri6:597.27:097.812:411.312:551.86:064:47Waxing Gibbous24Fri
25Sat7:497.58:018.01:311.11:481.56:084:46Waxing Gibbous25Sat
26Sun8:337.88:498.22:171.02:361.16:094:44Waxing Gibbous26Sun
27Mon9:148.39:338.32:580.83:200.66:104:43Waxing Gibbous27Mon
28Tue9:518.710:158.53:370.64:020.26:114:41Full Moon28Tue
29Wed10:299.010:578.54:140.44:44-0.26:134:40Full Moon29Wed
30Thu11:079.311:408.54:530.35:26-0.46:144:39Full Moon30Thu
31Fri11:489.55:340.36:10-0.66:154:37Waning Gibbous31Fri
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 2:40 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 spring phase. Tonight's moon is 0% 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 New Moon (0% 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