Tides Today & Tomorrow in Atlantic Heights, NH

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Atlantic Heights, NH.
Next low tide (tomorrow) : in 4h 59m at 12:31 am (0.8 ft)
Next high tide (tomorrow) : 6:50 am (6.8 ft)
Sunset today : 8:16 pm
Sunrise tomorrow : 5:22 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8423635
Common Questions About Tides

Atlantic Heights, NH Tides - Aug 1986

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri9:386.39:457.43:201.03:181.75:338:05Waning Crescent1Fri
2Sat10:296.410:337.64:110.84:071.65:348:03Waning Crescent2Sat
3Sun11:156.611:177.84:560.74:521.45:358:02Waning Crescent3Sun
4Mon11:576.811:588.05:380.55:331.25:368:01New Moon4Mon
5Tue12:376.96:160.36:121.15:378:00New Moon5Tue
6Wed12:378.11:147.16:510.16:510.95:387:58New Moon6Wed
7Thu1:158.21:497.37:260.07:300.75:397:57New Moon7Thu
8Fri1:528.22:247.68:01-0.18:100.55:417:56Waxing Crescent8Fri
9Sat2:318.23:007.88:37-0.18:530.45:427:54Waxing Crescent9Sat
10Sun3:128.13:408.09:16-0.19:390.35:437:53Waxing Crescent10Sun
11Mon3:587.84:248.110:000.110:300.25:447:52First Quarter11Mon
12Tue4:497.65:138.210:470.311:260.25:457:50First Quarter12Tue
13Wed5:467.36:088.311:400.55:467:49First Quarter13Wed
14Thu6:477.17:088.312:260.212:370.75:477:47First Quarter14Thu
15Fri7:557.08:138.41:310.21:410.85:487:46Waxing Gibbous15Fri
16Sat9:047.09:208.52:400.12:480.75:497:44Waxing Gibbous16Sat
17Sun10:097.210:228.83:45-0.23:520.55:507:43Waxing Gibbous17Sun
18Mon11:077.511:209.04:45-0.44:520.35:517:41Full Moon18Mon
19Tue12:027.85:39-0.65:470.05:537:40Full Moon19Tue
20Wed12:149.012:528.06:29-0.76:40-0.15:547:38Full Moon20Wed
21Thu1:069.01:408.17:17-0.77:30-0.15:557:37Waning Gibbous21Thu
22Fri1:548.72:248.28:01-0.58:190.05:567:35Waning Gibbous22Fri
23Sat2:418.43:088.18:44-0.19:070.25:577:33Waning Gibbous23Sat
24Sun3:287.93:527.99:270.39:560.45:587:32Waning Gibbous24Sun
25Mon4:177.44:387.710:110.710:470.75:597:30Third Quarter25Mon
26Tue5:096.95:267.410:581.211:411.06:007:28Third Quarter26Tue
27Wed6:046.66:187.211:481.56:017:27Third Quarter27Wed
28Thu7:016.37:137.112:381.212:421.86:027:25Third Quarter28Thu
29Fri8:026.28:127.11:391.31:411.96:037:23Waning Crescent29Fri
30Sat9:016.29:107.22:411.22:411.86:057:22Waning Crescent30Sat
31Sun9:546.410:017.53:351.03:341.66:067:20Waning Crescent31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8423635)

Common Questions About Atlantic Heights, NH Tides

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What time does the tide turn (slack tide) in Atlantic Heights, NH today?

Slack tide in Atlantic Heights, NH is approximately 3:40 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 Atlantic Heights, NH?

Atlantic Heights, NH is currently in a neap phase. Tonight's moon is 52% 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 minimum.

What datum are Atlantic Heights, 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 Atlantic Heights, NH?

Tide predictions for Atlantic Heights, 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 Atlantic Heights, NH?

Tide data for Atlantic Heights, NH is sourced from NOAA Station #8423635. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8423635.

What is the moon phase in Atlantic Heights, NH tonight?

Tonight the moon over Atlantic Heights, NH is First Quarter (52% illuminated). This places Atlantic Heights, NH in a neap tide cycle, so tidal ranges are near their weekly minimum 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