Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

43°
H 64°
L 40°
N
5mph
High tide
7:24 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Tuesday, October 20, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 1:16 pm (2.0 ft)
Next high tide : in 5m at 7:24 am (7.1 ft)
Sunset today : 5:52 pm
Sunrise tomorrow : 7:02 am
Moon phase : First Quarter (69% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Dec 1817

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon4:207.44:268.110:121.510:490.66:584:13Third Quarter1Mon
2Tue5:137.75:258.111:121.311:430.57:004:13Third Quarter2Tue
3Wed6:068.16:268.212:130.97:014:12Waning Crescent3Wed
4Thu7:018.67:288.312:380.31:140.37:024:12Waning Crescent4Thu
5Fri7:549.28:278.51:330.12:13-0.37:034:12Waning Crescent5Fri
6Sat8:469.79:238.72:27-0.13:09-0.97:044:12Waning Crescent6Sat
7Sun9:3710.210:188.83:19-0.34:03-1.37:054:12New Moon7Sun
8Mon10:2910.411:128.94:11-0.44:56-1.67:064:12New Moon8Mon
9Tue11:2110.55:03-0.45:49-1.67:064:12New Moon9Tue
10Wed12:078.812:1410.45:56-0.36:41-1.47:074:12Waxing Crescent10Wed
11Thu1:018.71:0810.06:490.07:35-1.17:084:12Waxing Crescent11Thu
12Fri1:568.42:049.67:440.38:30-0.77:094:12Waxing Crescent12Fri
13Sat2:538.23:029.08:430.69:27-0.27:104:12First Quarter13Sat
14Sun3:518.04:028.59:440.910:240.27:114:12First Quarter14Sun
15Mon4:497.95:038.110:471.111:200.67:114:12First Quarter15Mon
16Tue5:467.96:057.711:511.27:124:13First Quarter16Tue
17Wed6:417.97:067.512:160.912:521.17:134:13Waxing Gibbous17Wed
18Thu7:338.08:027.31:091.11:501.07:134:13Waxing Gibbous18Thu
19Fri8:208.28:537.31:591.22:420.77:144:14Waxing Gibbous19Fri
20Sat9:048.39:407.32:451.33:280.57:154:14Waxing Gibbous20Sat
21Sun9:448.510:237.43:271.34:100.47:154:15Full Moon21Sun
22Mon10:228.611:037.44:061.34:490.27:164:15Full Moon22Mon
23Tue11:008.611:427.44:441.35:260.27:164:16Full Moon23Tue
24Wed11:378.75:211.26:030.17:164:16Full Moon24Wed
25Thu12:207.412:158.75:591.26:390.17:174:17Waning Gibbous25Thu
26Fri12:587.412:538.76:371.27:170.17:174:18Waning Gibbous26Fri
27Sat1:367.51:348.67:191.17:570.17:184:18Waning Gibbous27Sat
28Sun2:177.52:188.58:041.18:400.17:184:19Waning Gibbous28Sun
29Mon3:017.73:078.48:531.09:260.17:184:20Third Quarter29Mon
30Tue3:487.94:008.29:470.910:160.27:184:20Third Quarter30Tue
31Wed4:388.24:578.110:460.711:040.37:184:21Third Quarter31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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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 69% 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 (69% 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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