Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

58°
H -°
L 47°
NNW
7mph
Low tide
11:53 pm
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 31m at 11:53 pm (1.3 ft)
Next high tide (tomorrow) : 6:07 am (6.9 ft)
Sunset today : 6:47 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - May 1874

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri11:237.911:268.75:090.35:131.04:406:47Full Moon1Fri
2Sat12:007.85:440.25:461.14:386:48Full Moon2Sat
3Sun12:377.76:200.26:211.24:376:49Waning Gibbous3Sun
4Mon12:348.71:157.66:570.26:581.34:366:50Waning Gibbous4Mon
5Tue1:128.71:567.47:370.37:391.44:346:52Waning Gibbous5Tue
6Wed1:538.62:417.38:210.48:251.54:336:53Waning Gibbous6Wed
7Thu2:408.63:317.39:100.59:171.54:326:54Third Quarter7Thu
8Fri3:348.54:267.410:040.510:161.54:306:55Third Quarter8Fri
9Sat4:328.45:237.611:010.511:191.34:296:56Third Quarter9Sat
10Sun5:358.56:228.011:590.34:286:57Third Quarter10Sun
11Mon6:408.67:208.612:230.912:570.24:276:58Waning Crescent11Mon
12Tue7:438.78:159.11:270.41:540.04:266:59Waning Crescent12Tue
13Wed8:438.99:069.72:28-0.22:47-0.24:257:00Waning Crescent13Wed
14Thu9:399.19:5710.13:24-0.83:39-0.44:247:02New Moon14Thu
15Fri10:349.110:4610.34:17-1.24:29-0.44:227:03New Moon15Fri
16Sat11:279.011:3610.35:10-1.45:19-0.24:217:04New Moon16Sat
17Sun12:208.96:01-1.36:090.04:207:05Waxing Crescent17Sun
18Mon12:2710.11:138.66:53-1.17:000.44:197:06Waxing Crescent18Mon
19Tue1:189.82:068.27:45-0.77:520.84:197:07Waxing Crescent19Tue
20Wed2:119.33:027.98:39-0.28:481.24:187:08Waxing Crescent20Wed
21Thu3:078.83:597.79:350.29:481.54:177:09First Quarter21Thu
22Fri4:058.44:567.610:320.610:491.74:167:10First Quarter22Fri
23Sat5:048.05:517.611:280.911:501.74:157:11First Quarter23Sat
24Sun6:047.76:457.712:221.14:147:12First Quarter24Sun
25Mon7:027.67:357.812:501.61:131.34:147:13Waxing Gibbous25Mon
26Tue7:577.58:208.11:461.42:001.34:137:14Waxing Gibbous26Tue
27Wed8:467.59:018.32:361.12:431.44:127:14Waxing Gibbous27Wed
28Thu9:327.59:408.53:210.83:231.44:117:15Waxing Gibbous28Thu
29Fri10:147.610:178.74:020.64:011.34:117:16Full Moon29Fri
30Sat10:557.610:538.84:410.44:381.34:107:17Full Moon30Sat
31Sun11:357.611:318.95:190.35:161.34:107:18Full Moon31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

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Common Questions About Seavey Island, NH Tides

Collapse All
Is this week a spring tide or neap tide in Seavey Island, NH?

Seavey Island, NH is currently in a neap phase. Tonight's moon is 48% 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 minimum.

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 First Quarter (48% illuminated). This places Seavey Island, NH in a neap tide cycle, so tidal ranges are near their weekly minimum 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

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