Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

62°
H -°
L 60°
N
2mph
High tide
4:23 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Thursday, September 17, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 10:15 am (1.5 ft)
Next high tide : in 2h 36m at 4:23 am (7.5 ft)
Sunset today : 6:49 pm
Sunrise tomorrow : 6:24 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Sep 1875

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed12:108.75:54-0.36:090.15:106:22New Moon1Wed
2Thu12:279.112:508.76:340.06:540.25:116:21Waxing Crescent2Thu
3Fri1:098.71:298.67:130.37:370.45:126:19Waxing Crescent3Fri
4Sat1:528.32:088.57:520.78:220.65:146:17Waxing Crescent4Sat
5Sun2:367.82:498.38:331.19:090.95:156:15Waxing Crescent5Sun
6Mon3:237.43:348.09:161.59:591.25:166:14First Quarter6Mon
7Tue4:147.04:247.810:041.910:541.45:176:12First Quarter7Tue
8Wed5:096.85:187.710:572.111:521.55:186:10First Quarter8Wed
9Thu6:096.66:177.711:542.25:196:08First Quarter9Thu
10Fri7:096.77:167.912:521.512:532.15:206:06Waxing Gibbous10Fri
11Sat8:056.98:118.11:491.31:501.85:216:05Waxing Gibbous11Sat
12Sun8:537.38:598.52:380.92:411.45:226:03Waxing Gibbous12Sun
13Mon9:367.79:448.83:210.53:271.05:236:01Waxing Gibbous13Mon
14Tue10:168.210:289.14:010.24:110.55:255:59Full Moon14Tue
15Wed10:558.711:119.34:40-0.14:550.05:265:57Full Moon15Wed
16Thu11:349.111:559.35:19-0.35:39-0.45:275:56Full Moon16Thu
17Fri12:159.46:00-0.46:25-0.65:285:54Waning Gibbous17Fri
18Sat12:409.212:579.66:42-0.37:12-0.75:295:52Waning Gibbous18Sat
19Sun1:288.91:449.77:27-0.18:04-0.65:305:50Waning Gibbous19Sun
20Mon2:208.62:359.58:160.29:00-0.35:315:48Third Quarter20Mon
21Tue3:178.23:329.39:110.610:010.05:325:47Third Quarter21Tue
22Wed4:217.84:359.010:120.911:080.25:335:45Third Quarter22Wed
23Thu5:297.65:458.811:191.25:345:43Third Quarter23Thu
24Fri6:407.56:568.812:170.412:291.25:365:41Waning Crescent24Fri
25Sat7:477.78:038.91:250.31:381.05:375:39Waning Crescent25Sat
26Sun8:458.19:019.02:260.22:390.75:385:38Waning Crescent26Sun
27Mon9:378.49:539.03:180.13:340.45:395:36New Moon27Mon
28Tue10:228.710:409.04:050.04:220.15:405:34New Moon28Tue
29Wed11:038.811:248.84:470.15:070.05:415:32New Moon29Wed
30Thu11:418.95:260.25:490.05:425:30New Moon30Thu
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 39% 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 (39% 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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