Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

46°
H -°
L 43°
WSW
1mph
High tide
7:04 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Sunday, September 20, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 12:53 pm (2.1 ft)
Next high tide : in 4h 05m at 7:04 am (6.8 ft)
Sunset today : 6:44 pm
Sunrise tomorrow : 6:28 am
Moon phase : First Quarter (67% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Oct 1871

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:408.812:548.96:390.37:050.05:435:29Waning Gibbous1Sun
2Mon1:228.41:328.77:180.77:480.35:455:27Waning Gibbous2Mon
3Tue2:048.02:138.57:581.18:330.65:465:25Waning Gibbous3Tue
4Wed2:507.62:578.28:411.49:210.95:475:23Third Quarter4Wed
5Thu3:397.33:458.09:291.710:131.25:485:22Third Quarter5Thu
6Fri4:327.04:387.810:212.011:081.35:495:20Third Quarter6Fri
7Sat5:286.95:367.711:172.15:505:18Third Quarter7Sat
8Sun6:267.06:347.812:051.412:152.05:515:16Third Quarter8Sun
9Mon7:227.27:318.01:011.21:131.85:535:15Waning Crescent9Mon
10Tue8:127.58:228.31:531.02:061.45:545:13Waning Crescent10Tue
11Wed8:568.09:098.62:390.62:540.95:555:11Waning Crescent11Wed
12Thu9:378.59:548.93:210.33:390.35:565:10New Moon12Thu
13Fri10:179.010:389.14:010.04:23-0.25:575:08New Moon13Fri
14Sat10:579.411:239.24:42-0.25:07-0.65:595:06New Moon14Sat
15Sun11:389.75:24-0.45:53-0.96:005:05New Moon15Sun
16Mon12:099.212:229.96:07-0.46:40-1.06:015:03Waxing Crescent16Mon
17Tue12:579.11:099.96:53-0.27:30-0.96:025:01Waxing Crescent17Tue
18Wed1:498.82:009.87:430.08:25-0.76:035:00Waxing Crescent18Wed
19Thu2:458.52:579.58:380.49:24-0.46:054:58First Quarter19Thu
20Fri3:478.24:009.29:390.710:28-0.16:064:57First Quarter20Fri
21Sat4:538.05:078.910:450.911:350.16:074:55First Quarter21Sat
22Sun6:018.06:178.811:541.06:084:54First Quarter22Sun
23Mon7:078.17:258.812:410.21:030.86:104:52Waxing Gibbous23Mon
24Tue8:078.48:278.81:440.12:070.66:114:51Waxing Gibbous24Tue
25Wed9:008.79:218.92:390.13:030.26:124:49Waxing Gibbous25Wed
26Thu9:479.010:108.93:280.03:530.06:134:48Full Moon26Thu
27Fri10:309.110:558.74:120.14:39-0.26:154:46Full Moon27Fri
28Sat11:099.111:378.54:530.25:21-0.26:164:45Full Moon28Sat
29Sun11:469.15:310.56:02-0.16:174:43Full Moon29Sun
30Mon12:178.312:228.96:090.76:410.06:184:42Waning Gibbous30Mon
31Tue12:578.012:598.76:461.07:200.36:204:41Waning Gibbous31Tue
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 transitional phase. Tonight's moon is 67% 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 First Quarter (67% 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

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