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 1h 53m 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 - Nov 1978

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed11:079.411:408.64:520.25:24-0.56:174:35New Moon1Wed
2Thu11:499.65:340.16:09-0.76:184:34Waxing Crescent2Thu
3Fri12:258.612:359.76:190.16:56-0.76:194:33Waxing Crescent3Fri
4Sat1:148.61:249.67:080.17:47-0.66:214:31Waxing Crescent4Sat
5Sun2:068.52:189.48:010.38:42-0.56:224:30Waxing Crescent5Sun
6Mon3:048.43:179.28:590.59:41-0.36:234:29First Quarter6Mon
7Tue4:068.34:229.010:030.610:44-0.26:254:28First Quarter7Tue
8Wed5:108.45:298.811:100.611:48-0.16:264:26First Quarter8Wed
9Thu6:158.66:378.812:180.46:274:25Waxing Gibbous9Thu
10Fri7:178.97:438.812:51-0.11:240.16:284:24Waxing Gibbous10Fri
11Sat8:169.28:429.01:51-0.22:25-0.26:304:23Waxing Gibbous11Sat
12Sun9:089.59:379.02:46-0.33:20-0.66:314:22Waxing Gibbous12Sun
13Mon9:579.710:279.03:36-0.34:10-0.86:324:21Full Moon13Mon
14Tue10:429.711:138.94:23-0.24:57-0.86:344:20Full Moon14Tue
15Wed11:249.611:578.75:070.05:41-0.86:354:19Full Moon15Wed
16Thu12:059.45:490.26:23-0.56:364:18Full Moon16Thu
17Fri12:398.412:449.26:300.57:04-0.36:374:17Waning Gibbous17Fri
18Sat1:208.21:248.97:110.87:450.16:394:17Waning Gibbous18Sat
19Sun2:027.92:058.67:521.18:270.46:404:16Waning Gibbous19Sun
20Mon2:457.72:498.38:361.39:110.66:414:15Waning Gibbous20Mon
21Tue3:307.63:368.09:231.59:580.86:424:14Third Quarter21Tue
22Wed4:187.54:267.810:141.610:461.06:444:14Third Quarter22Wed
23Thu5:077.55:207.711:081.611:351.16:454:13Third Quarter23Thu
24Fri5:587.76:157.612:031.56:464:12Third Quarter24Fri
25Sat6:487.97:117.712:261.112:581.26:474:12Waning Crescent25Sat
26Sun7:378.28:047.81:161.01:520.86:484:11Waning Crescent26Sun
27Mon8:248.68:548.02:050.82:420.36:504:11Waning Crescent27Mon
28Tue9:099.19:428.22:520.53:29-0.16:514:10New Moon28Tue
29Wed9:549.510:308.53:370.34:15-0.66:524:10New Moon29Wed
30Thu10:409.811:188.64:230.05:02-0.96:534:09New Moon30Thu
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 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