Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Thursday, July 23, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 17m at 1:20 am (0.9 ft)
Next high tide : 7:30 am (7.2 ft)
Sunset today : 8:14 pm
Sunrise tomorrow : 5:24 am
Moon phase : Waxing Gibbous (71% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Apr 2068

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun11:069.711:3010.04:49-1.15:12-1.16:227:10New Moon1Sun
2Mon12:009.85:42-1.56:03-1.16:217:11New Moon2Mon
3Tue12:2010.212:529.76:34-1.76:52-1.06:197:12New Moon3Tue
4Wed1:1010.31:449.57:26-1.77:42-0.76:177:13Waxing Crescent4Wed
5Thu2:0010.12:379.18:18-1.48:32-0.36:157:14Waxing Crescent5Thu
6Fri2:519.83:308.69:11-0.99:240.26:147:15Waxing Crescent6Fri
7Sat3:449.34:268.210:06-0.410:200.76:127:17First Quarter7Sat
8Sun4:408.85:247.811:040.111:181.16:107:18First Quarter8Sun
9Mon5:388.36:237.512:030.56:087:19First Quarter9Mon
10Tue6:388.07:227.412:191.31:020.86:077:20First Quarter10Tue
11Wed7:397.88:187.51:211.41:591.06:057:21Waxing Gibbous11Wed
12Thu8:367.89:087.72:211.42:521.06:037:22Waxing Gibbous12Thu
13Fri9:287.89:537.93:141.13:381.06:027:24Waxing Gibbous13Fri
14Sat10:147.910:338.24:010.94:190.96:007:25Waxing Gibbous14Sat
15Sun10:558.011:098.44:430.64:560.85:597:26Full Moon15Sun
16Mon11:348.111:448.65:210.35:310.75:577:27Full Moon16Mon
17Tue12:128.15:580.16:050.75:557:28Full Moon17Tue
18Wed12:188.812:508.16:340.06:400.75:547:29Full Moon18Wed
19Thu12:538.91:278.07:11-0.17:160.75:527:31Waning Gibbous19Thu
20Fri1:308.92:068.07:49-0.17:550.85:517:32Waning Gibbous20Fri
21Sat2:098.92:487.98:30-0.18:380.85:497:33Waning Gibbous21Sat
22Sun2:528.93:347.89:150.09:260.95:477:34Waning Gibbous22Sun
23Mon3:418.84:257.810:050.110:200.95:467:35Third Quarter23Mon
24Tue4:358.75:227.911:000.111:200.95:447:36Third Quarter24Tue
25Wed5:358.66:228.111:590.25:437:38Third Quarter25Wed
26Thu6:408.67:248.412:240.81:000.15:417:39Third Quarter26Thu
27Fri7:478.78:258.91:300.52:020.05:407:40Waning Crescent27Fri
28Sat8:528.89:239.42:360.03:01-0.25:397:41Waning Crescent28Sat
29Sun9:539.110:179.83:37-0.53:57-0.45:377:42Waning Crescent29Sun
30Mon10:509.211:0910.24:34-1.04:50-0.65:367:43New Moon30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

Common Questions About Seavey Island, NH Tides

Show All
What time does the tide turn (slack tide) in Seavey Island, NH today?

Slack tide in Seavey Island, NH is approximately 4:25 am — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

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 71% 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 (71% 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