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 3h 53m 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 - Jul 1986

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue8:206.88:427.62:040.92:131.25:078:26Waning Crescent1Tue
2Wed9:186.79:327.73:020.83:051.45:078:26Waning Crescent2Wed
3Thu10:116.610:187.73:540.73:541.45:088:26Waning Crescent3Thu
4Fri10:596.611:017.84:410.64:381.55:088:25Waning Crescent4Fri
5Sat11:446.711:437.95:250.55:201.45:098:25New Moon5Sat
6Sun12:266.86:050.45:591.45:108:25New Moon6Sun
7Mon12:237.91:066.86:440.36:381.35:108:24New Moon7Mon
8Tue1:028.01:446.97:200.27:161.25:118:24New Moon8Tue
9Wed1:398.02:207.07:560.27:541.25:128:24Waxing Crescent9Wed
10Thu2:168.02:567.18:310.18:341.15:138:23Waxing Crescent10Thu
11Fri2:548.03:347.29:080.19:171.05:138:23Waxing Crescent11Fri
12Sat3:357.94:147.49:470.110:040.95:148:22Waxing Crescent12Sat
13Sun4:217.84:577.610:300.210:540.75:158:22First Quarter13Sun
14Mon5:117.65:447.911:160.311:490.65:168:21First Quarter14Mon
15Tue6:067.46:358.112:060.45:178:20First Quarter15Tue
16Wed7:057.37:308.312:460.41:000.55:178:20Waxing Gibbous16Wed
17Thu8:097.28:298.61:490.21:590.55:188:19Waxing Gibbous17Thu
18Fri9:157.29:308.82:53-0.13:010.55:198:18Waxing Gibbous18Fri
19Sat10:187.410:309.13:55-0.44:010.45:208:17Waxing Gibbous19Sat
20Sun11:177.611:289.34:54-0.75:000.25:218:17Full Moon20Sun
21Mon12:157.85:51-0.95:570.05:228:16Full Moon21Mon
22Tue12:259.31:107.96:45-1.06:530.05:238:15Full Moon22Tue
23Wed1:209.32:028.07:37-1.07:470.05:248:14Waning Gibbous23Wed
24Thu2:129.12:538.08:27-0.88:410.15:258:13Waning Gibbous24Thu
25Fri3:048.73:438.09:16-0.59:350.35:268:12Waning Gibbous25Fri
26Sat3:578.24:337.910:04-0.110:300.55:278:11Waning Gibbous26Sat
27Sun4:517.75:237.710:530.411:270.75:288:10Third Quarter27Sun
28Mon5:467.26:137.611:430.85:298:09Third Quarter28Mon
29Tue6:436.87:057.412:240.912:331.25:308:08Third Quarter29Tue
30Wed7:416.57:587.41:231.01:271.55:318:07Third Quarter30Wed
31Thu8:416.38:537.42:231.12:241.75:328:06Waning Crescent31Thu
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