Tides Today & Tomorrow in Atlantic Heights, NH

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Atlantic Heights, NH.
Next low tide (tomorrow) : in 5h 44m at 1:52 am (1.2 ft)
Next high tide (tomorrow) : 8:13 am (6.2 ft)
Sunset today : 7:36 pm
Sunrise tomorrow : 5:55 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8423635
Common Questions About Tides

Atlantic Heights, NH Tides - Aug 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue12:578.11:287.47:070.17:120.75:328:05Full Moon1Tue
2Wed1:348.12:047.57:410.17:490.75:338:04Waning Gibbous2Wed
3Thu2:097.92:387.58:130.28:260.75:348:03Waning Gibbous3Thu
4Fri2:457.73:127.58:470.39:040.85:358:02Waning Gibbous4Fri
5Sat3:237.53:487.59:220.59:450.85:378:00Waning Gibbous5Sat
6Sun4:037.34:277.510:010.610:290.95:387:59Third Quarter6Sun
7Mon4:477.15:117.610:440.811:180.95:397:58Third Quarter7Mon
8Tue5:366.95:597.611:300.95:407:57Third Quarter8Tue
9Wed6:296.86:517.812:100.812:220.95:417:55Third Quarter9Wed
10Thu7:286.87:498.01:080.71:180.95:427:54Waning Crescent10Thu
11Fri8:317.08:508.32:090.42:190.75:437:53Waning Crescent11Fri
12Sat9:327.39:498.73:100.13:200.35:447:51Waning Crescent12Sat
13Sun10:297.710:459.14:07-0.44:17-0.15:457:50New Moon13Sun
14Mon11:238.211:409.45:00-0.95:13-0.55:467:48New Moon14Mon
15Tue12:168.65:52-1.26:08-0.85:477:47New Moon15Tue
16Wed12:349.61:089.06:43-1.47:02-1.05:487:45New Moon16Wed
17Thu1:289.61:599.27:34-1.47:56-1.15:507:44Waxing Crescent17Thu
18Fri2:219.32:509.28:24-1.28:51-1.05:517:42Waxing Crescent18Fri
19Sat3:169.03:449.09:16-0.99:48-0.75:527:41Waxing Crescent19Sat
20Sun4:138.54:408.710:10-0.410:48-0.35:537:39First Quarter20Sun
21Mon5:137.95:388.411:070.111:500.05:547:38First Quarter21Mon
22Tue6:157.56:388.112:070.55:557:36First Quarter22Tue
23Wed7:197.27:407.912:550.31:090.85:567:34First Quarter23Wed
24Thu8:227.08:417.82:000.52:131.05:577:33Waxing Gibbous24Thu
25Fri9:227.09:387.83:020.53:131.05:587:31Waxing Gibbous25Fri
26Sat10:157.110:287.93:560.44:050.95:597:29Waxing Gibbous26Sat
27Sun11:017.211:138.04:430.44:510.86:017:28Waxing Gibbous27Sun
28Mon11:437.411:548.05:250.35:330.76:027:26Full Moon28Mon
29Tue12:217.56:020.26:110.66:037:24Full Moon29Tue
30Wed12:328.012:577.66:360.26:470.56:047:23Full Moon30Wed
31Thu1:087.91:307.77:080.37:220.56:057:21Full Moon31Thu
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 5:02 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 transitional phase. Tonight's moon is 65% 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 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 (65% illuminated). This places Atlantic Heights, 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