Tides Today & Tomorrow in Atlantic Heights, NH

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Atlantic Heights, NH.
Next low tide : 12:54 pm (1.7 ft)
Next high tide : in 0m at 7:12 am (6.3 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 - Sep 1940

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun11:258.311:439.25:02-0.65:18-0.56:077:18New Moon1Sun
2Mon12:148.75:51-1.06:09-0.96:087:16New Moon2Mon
3Tue12:349.41:039.16:39-1.27:01-1.16:097:15New Moon3Tue
4Wed1:269.41:529.37:28-1.37:53-1.26:107:13Waxing Crescent4Wed
5Thu2:189.22:429.38:17-1.18:47-1.16:117:11Waxing Crescent5Thu
6Fri3:128.93:359.29:09-0.89:44-0.96:127:09Waxing Crescent6Fri
7Sat4:098.44:338.910:04-0.410:44-0.56:137:08First Quarter7Sat
8Sun5:118.05:348.511:040.111:48-0.26:147:06First Quarter8Sun
9Mon6:167.66:388.312:070.46:167:04First Quarter9Mon
10Tue7:227.47:448.112:550.11:130.76:177:02Waxing Gibbous10Tue
11Wed8:287.38:488.02:020.32:200.86:187:00Waxing Gibbous11Wed
12Thu9:287.39:468.03:050.33:210.76:196:59Waxing Gibbous12Thu
13Fri10:217.510:378.14:000.24:150.66:206:57Waxing Gibbous13Fri
14Sat11:077.611:238.14:480.25:020.46:216:55Full Moon14Sat
15Sun11:497.75:300.15:440.36:226:53Full Moon15Sun
16Mon12:058.112:277.86:080.26:230.36:236:51Full Moon16Mon
17Tue12:438.01:037.96:420.26:590.36:246:50Full Moon17Tue
18Wed1:207.91:367.97:150.47:340.36:256:48Full Moon18Wed
19Thu1:567.72:097.87:480.58:090.46:276:46Waning Gibbous19Thu
20Fri2:317.52:437.78:210.78:460.56:286:44Waning Gibbous20Fri
21Sat3:087.33:197.68:570.89:260.66:296:42Waning Gibbous21Sat
22Sun3:487.13:597.59:371.010:100.76:306:41Waning Gibbous22Sun
23Mon4:336.94:457.510:221.210:590.86:316:39Third Quarter23Mon
24Tue5:236.75:377.411:121.311:520.86:326:37Third Quarter24Tue
25Wed6:186.76:337.512:061.26:336:35Third Quarter25Wed
26Thu7:166.87:337.712:490.71:051.16:346:33Waning Crescent26Thu
27Fri8:167.28:358.01:490.52:070.76:356:32Waning Crescent27Fri
28Sat9:137.69:348.42:480.13:070.36:376:30Waning Crescent28Sat
29Sun9:078.29:298.82:42-0.33:04-0.35:385:28Waning Crescent29Sun
30Mon9:578.810:229.13:34-0.73:57-0.95:395:26New Moon30Mon
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 10:03 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