Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

57°
H 67°
L 54°
N
4mph
High tide
3:02 pm
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Tuesday, September 15, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 9:20 pm (0.3 ft)
Next high tide : in 5h 15m at 3:02 pm (8.8 ft)
Sunset today : 6:53 pm
Sunrise tomorrow : 6:22 am
Moon phase : Waxing Crescent (21% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

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Seavey Island, NH Tides - Oct 1879

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed11:418.85:270.55:530.15:435:29Full Moon1Wed
2Thu12:088.312:168.86:020.76:300.25:455:27Waning Gibbous2Thu
3Fri12:458.012:508.66:371.07:080.45:465:25Waning Gibbous3Fri
4Sat1:237.81:278.57:131.27:480.65:475:23Waning Gibbous4Sat
5Sun2:037.52:078.37:521.48:300.95:485:22Waning Gibbous5Sun
6Mon2:477.22:518.18:341.79:171.15:495:20Third Quarter6Mon
7Tue3:367.03:417.99:221.910:091.25:505:18Third Quarter7Tue
8Wed4:296.94:357.810:162.011:031.35:525:16Third Quarter8Wed
9Thu5:247.05:327.911:131.911:581.25:535:15Third Quarter9Thu
10Fri6:207.26:318.012:121.75:545:13Waning Crescent10Fri
11Sat7:147.67:288.312:530.91:111.35:555:11Waning Crescent11Sat
12Sun8:048.18:228.61:450.62:060.75:565:10Waning Crescent12Sun
13Mon8:508.79:139.02:330.22:580.05:575:08Waning Crescent13Mon
14Tue9:359.410:029.23:19-0.13:47-0.65:595:06New Moon14Tue
15Wed10:209.910:529.34:05-0.44:37-1.16:005:05New Moon15Wed
16Thu11:0610.211:429.34:51-0.55:26-1.46:015:03New Moon16Thu
17Fri11:5510.45:39-0.56:17-1.46:025:01Waxing Crescent17Fri
18Sat12:349.112:4510.36:28-0.47:10-1.26:035:00Waxing Crescent18Sat
19Sun1:288.91:3910.17:20-0.18:05-0.96:054:58Waxing Crescent19Sun
20Mon2:268.52:389.78:170.39:06-0.56:064:57First Quarter20Mon
21Tue3:288.23:429.29:190.710:09-0.16:074:55First Quarter21Tue
22Wed4:348.04:498.810:251.011:150.36:084:53First Quarter22Wed
23Thu5:407.95:578.511:341.16:104:52First Quarter23Thu
24Fri6:448.07:048.412:190.412:421.06:114:50Waxing Gibbous24Fri
25Sat7:428.28:048.31:190.51:460.86:124:49Waxing Gibbous25Sat
26Sun8:348.58:588.32:140.62:410.66:134:48Waxing Gibbous26Sun
27Mon9:198.69:458.33:010.63:300.36:154:46Waxing Gibbous27Mon
28Tue9:598.810:288.23:430.74:130.26:164:45Full Moon28Tue
29Wed10:368.811:088.14:210.84:530.16:174:43Full Moon29Wed
30Thu11:118.811:457.94:570.95:310.16:184:42Full Moon30Thu
31Fri11:468.85:321.16:070.26:204:40Full Moon31Fri
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 21% 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 Crescent (21% 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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