Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Saturday, August 15, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide : 8:13 pm (-0.3 ft)
Next high tide : in 4h 23m at 2:12 pm (9.2 ft)
Sunset today : 7:45 pm
Sunrise tomorrow : 5:48 am
Moon phase : Waxing Crescent (11% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Seavey Island, NH Tides - Mar 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed5:158.95:518.011:33-0.111:500.57:186:31First Quarter1Wed
2Thu6:148.66:557.612:370.27:176:33First Quarter2Thu
3Fri7:168.37:597.412:510.91:410.47:156:34First Quarter3Fri
4Sat8:188.29:007.31:541.12:430.57:136:35Waxing Gibbous4Sat
5Sun9:168.29:537.42:541.13:390.57:116:36Waxing Gibbous5Sun
6Mon10:068.310:407.63:471.04:270.37:106:38Waxing Gibbous6Mon
7Tue10:508.411:207.84:340.95:080.27:086:39Waxing Gibbous7Tue
8Wed11:308.511:577.95:150.75:450.27:066:40Full Moon8Wed
9Thu12:078.65:520.56:180.17:056:41Full Moon9Thu
10Fri12:318.112:428.66:280.46:500.17:036:43Full Moon10Fri
11Sat1:038.21:178.57:030.37:220.27:016:44Full Moon11Sat
12Sun1:358.31:528.47:380.27:550.36:596:45Waning Gibbous12Sun
13Mon2:088.32:298.28:140.28:290.46:586:46Waning Gibbous13Mon
14Tue2:438.43:088.08:530.29:070.66:566:47Waning Gibbous14Tue
15Wed3:228.43:527.79:360.39:500.86:546:49Waning Gibbous15Wed
16Thu4:058.34:417.510:250.410:390.96:526:50Third Quarter16Thu
17Fri4:568.35:377.311:200.511:341.06:516:51Third Quarter17Fri
18Sat5:538.36:397.312:210.56:496:52Third Quarter18Sat
19Sun6:578.47:467.512:361.01:260.36:476:53Waning Crescent19Sun
20Mon8:048.78:527.91:430.82:320.06:456:55Waning Crescent20Mon
21Tue9:109.19:528.42:500.43:33-0.56:446:56Waning Crescent21Tue
22Wed10:109.510:479.03:51-0.24:29-0.96:426:57Waning Crescent22Wed
23Thu11:079.911:399.54:49-0.85:21-1.36:406:58New Moon23Thu
24Fri12:0110.15:43-1.26:11-1.46:386:59New Moon24Fri
25Sat12:299.912:5410.16:36-1.57:00-1.46:367:00New Moon25Sat
26Sun1:1810.01:469.87:27-1.67:49-1.16:357:02Waxing Crescent26Sun
27Mon2:0710.02:389.48:19-1.48:38-0.76:337:03Waxing Crescent27Mon
28Tue2:579.73:318.99:12-1.09:29-0.16:317:04Waxing Crescent28Tue
29Wed3:489.34:268.410:07-0.510:230.46:297:05First Quarter29Wed
30Thu4:428.95:247.911:050.011:200.96:287:06First Quarter30Thu
31Fri5:398.46:247.512:050.46:267:07First Quarter31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

Common Questions About Seavey Island, NH Tides

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

Slack tide in Seavey Island, NH is approximately 5:12 pm — 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 spring phase. Tonight's moon is 11% 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 maximum.

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 (11% illuminated). This places Seavey Island, NH in a spring tide cycle, so tidal ranges are near their weekly maximum 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