Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Seavey Island, NH.
Next low tide (tomorrow) : 2:18 am (1.0 ft)
Next high tide : in 2h 56m at 7:47 pm (8.3 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 - May 2069

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:548.09:218.32:390.93:020.85:357:44Waxing Gibbous1Wed
2Thu9:458.010:058.53:320.73:480.85:337:45Waxing Gibbous2Thu
3Fri10:308.010:458.64:180.54:300.85:327:46Waxing Gibbous3Fri
4Sat11:128.011:218.75:000.35:070.85:317:48Full Moon4Sat
5Sun11:508.111:558.85:380.25:430.95:297:49Full Moon5Sun
6Mon12:278.06:140.16:170.95:287:50Full Moon6Mon
7Tue12:308.81:048.06:490.16:521.05:277:51Full Moon7Tue
8Wed1:058.81:417.97:240.17:281.05:267:52Waning Gibbous8Wed
9Thu1:418.82:197.98:010.18:061.15:257:53Waning Gibbous9Thu
10Fri2:198.82:597.88:400.18:471.15:237:54Waning Gibbous10Fri
11Sat3:018.73:437.89:220.29:331.15:227:55Waning Gibbous11Sat
12Sun3:478.64:307.910:090.310:251.15:217:56Third Quarter12Sun
13Mon4:388.55:228.010:590.311:221.05:207:58Third Quarter13Mon
14Tue5:358.46:168.311:530.35:197:59Third Quarter14Tue
15Wed6:358.47:138.612:220.812:500.35:188:00Third Quarter15Wed
16Thu7:388.48:129.11:250.51:490.15:178:01Waning Crescent16Thu
17Fri8:428.69:109.52:290.02:48-0.15:168:02Waning Crescent17Fri
18Sat9:448.810:0510.03:29-0.53:45-0.35:158:03Waning Crescent18Sat
19Sun10:429.110:5910.34:27-1.04:40-0.55:148:04New Moon19Sun
20Mon11:389.211:5210.55:22-1.45:34-0.55:138:05New Moon20Mon
21Tue12:349.36:16-1.66:27-0.55:128:06New Moon21Tue
22Wed12:4610.51:299.27:09-1.67:20-0.35:128:07Waxing Crescent22Wed
23Thu1:3910.32:239.08:02-1.38:14-0.15:118:08Waxing Crescent23Thu
24Fri2:3310.03:178.88:55-1.09:090.35:108:09Waxing Crescent24Fri
25Sat3:289.54:138.69:49-0.510:070.65:098:10Waxing Crescent25Sat
26Sun4:249.05:088.410:44-0.111:060.95:098:11First Quarter26Sun
27Mon5:218.56:028.311:390.35:088:11First Quarter27Mon
28Tue6:188.16:558.212:051.112:320.75:078:12First Quarter28Tue
29Wed7:157.87:478.21:041.21:251.05:078:13First Quarter29Wed
30Thu8:127.68:378.32:011.12:161.15:068:14Waxing Gibbous30Thu
31Fri9:047.69:238.42:551.03:041.25:068:15Waxing Gibbous31Fri
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 11:02 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 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