Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Wednesday, July 15, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 3h 19m at 6:43 pm (-0.1 ft)
Next high tide (tomorrow) : 1:04 am (10.2 ft)
Sunset today : 8:20 pm
Sunrise tomorrow : 5:17 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Nov 1986

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:579.410:288.83:420.14:15-0.56:174:35New Moon1Sat
2Sun10:409.811:168.84:260.05:02-0.96:184:34New Moon2Sun
3Mon11:2610.05:11-0.15:51-1.16:204:32New Moon3Mon
4Tue12:068.712:1510.05:590.06:41-1.06:214:31Waxing Crescent4Tue
5Wed12:598.51:079.96:500.17:35-0.86:224:30Waxing Crescent5Wed
6Thu1:558.32:049.67:440.48:34-0.56:234:29Waxing Crescent6Thu
7Fri2:568.03:069.38:450.79:37-0.26:254:28First Quarter7Fri
8Sat4:027.94:148.99:511.010:430.06:264:26First Quarter8Sat
9Sun5:097.95:248.711:021.111:480.26:274:25First Quarter9Sun
10Mon6:158.06:338.512:121.06:294:24Waxing Gibbous10Mon
11Tue7:178.37:388.512:510.31:190.76:304:23Waxing Gibbous11Tue
12Wed8:138.68:368.51:490.32:190.46:314:22Waxing Gibbous12Wed
13Thu9:018.99:278.52:410.33:120.16:324:21Waxing Gibbous13Thu
14Fri9:459.010:138.43:270.43:59-0.16:344:20Full Moon14Fri
15Sat10:259.110:568.24:080.54:42-0.26:354:19Full Moon15Sat
16Sun11:029.011:358.04:470.75:21-0.26:364:18Full Moon16Sun
17Mon11:378.95:240.95:590.06:374:17Full Moon17Mon
18Tue12:137.812:128.85:591.16:360.16:394:16Waning Gibbous18Tue
19Wed12:517.612:478.66:351.37:130.36:404:16Waning Gibbous19Wed
20Thu1:297.41:258.57:121.57:520.56:414:15Waning Gibbous20Thu
21Fri2:107.32:078.37:521.68:340.76:424:14Waning Gibbous21Fri
22Sat2:537.22:528.18:361.89:190.86:444:13Third Quarter22Sat
23Sun3:407.13:418.09:251.810:060.96:454:13Third Quarter23Sun
24Mon4:297.24:347.810:191.810:561.06:464:12Third Quarter24Mon
25Tue5:187.45:297.811:151.611:460.96:474:12Third Quarter25Tue
26Wed6:097.76:267.812:131.36:484:11Waning Crescent26Wed
27Thu6:598.17:247.912:370.81:110.86:504:11Waning Crescent27Thu
28Fri7:498.68:198.11:290.72:070.36:514:10Waning Crescent28Fri
29Sat8:379.29:128.32:190.43:00-0.36:524:10Waning Crescent29Sat
30Sun9:259.710:058.43:090.23:51-0.86:534:09New Moon30Sun
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 9:53 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 2% 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 (2% 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