Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

65°
H 67°
L 50°
NE
9mph
Low tide
1:51 pm
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 2h 29m at 1:51 pm (2.0 ft)
Next high tide : 8:10 pm (7.9 ft)
Sunset today : 6:42 pm
Sunrise tomorrow : 6:29 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Mar 1871

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed6:357.67:236.712:121.81:061.26:235:35Waxing Gibbous1Wed
2Thu7:337.78:196.91:101.72:021.06:215:36Waxing Gibbous2Thu
3Fri8:268.09:087.22:051.52:520.76:195:38Waxing Gibbous3Fri
4Sat9:148.49:527.62:551.23:360.36:185:39Waxing Gibbous4Sat
5Sun9:598.810:338.03:410.74:17-0.16:165:40Full Moon5Sun
6Mon10:429.111:128.44:240.34:57-0.46:145:41Full Moon6Mon
7Tue11:259.311:528.85:08-0.15:37-0.76:135:43Full Moon7Tue
8Wed12:089.45:51-0.56:17-0.86:115:44Full Moon8Wed
9Thu12:339.112:539.36:37-0.76:59-0.86:095:45Waning Gibbous9Thu
10Fri1:159.31:409.17:24-0.87:44-0.66:075:46Waning Gibbous10Fri
11Sat2:019.42:328.88:15-0.88:33-0.36:065:47Waning Gibbous11Sat
12Sun2:519.33:288.49:10-0.69:270.16:045:49Third Quarter12Sun
13Mon3:479.14:297.910:11-0.310:260.56:025:50Third Quarter13Mon
14Tue4:488.95:377.611:160.011:310.76:005:51Third Quarter14Tue
15Wed5:558.76:487.512:250.15:595:52Waning Crescent15Wed
16Thu7:068.77:577.712:390.91:340.15:575:53Waning Crescent16Thu
17Fri8:138.88:578.01:480.72:36-0.15:555:55Waning Crescent17Fri
18Sat9:139.09:508.32:500.53:31-0.35:535:56Waning Crescent18Sat
19Sun10:069.110:388.53:450.24:20-0.45:525:57New Moon19Sun
20Mon10:539.111:208.74:34-0.15:04-0.45:505:58New Moon20Mon
21Tue11:379.05:20-0.25:44-0.35:485:59New Moon21Tue
22Wed12:008.712:188.86:02-0.26:210.05:466:01New Moon22Wed
23Thu12:368.712:588.56:42-0.16:580.25:456:02Waxing Crescent23Thu
24Fri1:128.61:378.27:220.17:350.65:436:03Waxing Crescent24Fri
25Sat1:488.52:187.88:030.38:130.95:416:04Waxing Crescent25Sat
26Sun2:278.23:017.58:460.68:541.35:396:05Waxing Crescent26Sun
27Mon3:108.03:497.19:320.89:401.65:376:06First Quarter27Mon
28Tue3:577.84:416.910:231.110:311.85:366:08First Quarter28Tue
29Wed4:497.75:386.811:181.211:271.95:346:09First Quarter29Wed
30Thu5:467.66:376.812:161.25:326:10First Quarter30Thu
31Fri6:467.77:357.012:261.81:141.05:306:11Waxing Gibbous31Fri
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 75% 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 Waxing Gibbous (75% 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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