Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

63°
H 78°
L 47°
WNW
3mph
Low tide
11:04 am
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 3h 21m at 11:04 am (1.8 ft)
Next high tide : 5:22 pm (8.0 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 1875

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat7:088.27:458.212:521.21:250.54:406:47Waning Crescent1Sat
2Sun8:068.58:358.91:510.62:160.24:396:48Waning Crescent2Sun
3Mon9:018.89:229.52:46-0.13:06-0.14:376:49Waning Crescent3Mon
4Tue9:539.010:1010.03:39-0.73:54-0.34:366:50New Moon4Tue
5Wed10:469.110:5810.34:30-1.24:42-0.44:356:51New Moon5Wed
6Thu11:399.111:4810.45:22-1.55:32-0.44:336:52New Moon6Thu
7Fri12:329.06:14-1.56:23-0.24:326:54Waxing Crescent7Fri
8Sat12:4010.31:278.77:07-1.37:160.14:316:55Waxing Crescent8Sat
9Sun1:3510.02:258.48:03-0.98:130.54:296:56Waxing Crescent9Sun
10Mon2:339.63:268.19:02-0.59:140.94:286:57First Quarter10Mon
11Tue3:369.14:307.910:050.010:201.24:276:58First Quarter11Tue
12Wed4:418.75:337.811:080.311:281.34:266:59First Quarter12Wed
13Thu5:488.36:357.912:090.64:257:00First Quarter13Thu
14Fri6:538.17:328.112:351.31:080.84:247:01Waxing Gibbous14Fri
15Sat7:538.08:228.31:371.12:010.94:237:02Waxing Gibbous15Sat
16Sun8:477.99:078.52:330.82:481.04:227:03Waxing Gibbous16Sun
17Mon9:357.99:478.63:210.63:301.14:217:04Waxing Gibbous17Mon
18Tue10:187.810:248.74:050.44:081.24:207:05Full Moon18Tue
19Wed10:597.710:598.74:450.34:451.24:197:07Full Moon19Wed
20Thu11:377.711:348.75:220.35:201.34:187:08Full Moon20Thu
21Fri12:157.65:580.35:551.44:177:09Full Moon21Fri
22Sat12:098.712:527.56:350.46:321.54:167:10Waning Gibbous22Sat
23Sun12:468.61:317.47:120.47:101.64:157:10Waning Gibbous23Sun
24Mon1:258.52:127.37:510.57:521.74:147:11Waning Gibbous24Mon
25Tue2:078.42:557.38:340.68:381.74:147:12Waning Gibbous25Tue
26Wed2:538.33:427.49:190.69:291.74:137:13Third Quarter26Wed
27Thu3:438.34:307.610:080.610:241.54:127:14Third Quarter27Thu
28Fri4:378.25:217.910:580.611:221.24:127:15Third Quarter28Fri
29Sat5:348.26:138.311:500.54:117:16Third Quarter29Sat
30Sun6:348.27:068.812:220.812:440.44:107:17Waning Crescent30Sun
31Mon7:358.37:599.31:220.31:390.34:107:18Waning Crescent31Mon
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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