Tides Today & Tomorrow in Atlantic Heights, NH

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently rising in Atlantic Heights, NH.
Next low tide : 11:48 am (0.7 ft)
Next high tide : in 1h 45m at 5:52 am (7.3 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 - Jan 1987

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu12:049.55:38-0.36:24-1.47:144:18New Moon1Thu
2Fri12:498.012:599.36:33-0.37:17-1.37:144:19Waxing Crescent2Fri
3Sat1:438.01:549.07:29-0.38:10-1.07:144:20Waxing Crescent3Sat
4Sun2:378.02:518.68:26-0.19:04-0.77:144:21Waxing Crescent4Sun
5Mon3:337.93:508.19:260.29:58-0.27:144:22First Quarter5Mon
6Tue4:297.84:517.510:290.410:540.27:144:23First Quarter6Tue
7Wed5:257.75:537.111:320.511:500.77:144:24First Quarter7Wed
8Thu6:217.66:566.712:360.67:144:25First Quarter8Thu
9Fri7:187.57:586.612:481.01:390.67:144:26Waxing Gibbous9Fri
10Sat8:127.58:556.51:461.22:360.57:134:27Waxing Gibbous10Sat
11Sun9:037.69:456.62:391.33:260.47:134:28Waxing Gibbous11Sun
12Mon9:497.710:306.73:261.24:110.27:134:29Waxing Gibbous12Mon
13Tue10:327.811:126.74:091.14:520.27:124:30Full Moon13Tue
14Wed11:127.811:506.84:491.05:300.17:124:31Full Moon14Wed
15Thu11:497.95:261.06:050.07:114:33Full Moon15Thu
16Fri12:276.912:257.96:020.96:390.07:114:34Full Moon16Fri
17Sat1:017.01:007.96:380.87:110.07:104:35Waning Gibbous17Sat
18Sun1:347.01:357.87:150.87:450.17:104:36Waning Gibbous18Sun
19Mon2:087.12:127.67:530.88:200.17:094:37Waning Gibbous19Mon
20Tue2:447.22:537.48:360.78:590.37:084:39Waning Gibbous20Tue
21Wed3:237.33:407.29:230.79:430.47:084:40Third Quarter21Wed
22Thu4:087.54:326.910:150.610:310.67:074:41Third Quarter22Thu
23Fri4:577.65:306.711:110.511:240.77:064:42Third Quarter23Fri
24Sat5:537.86:356.612:130.47:064:44Waning Crescent24Sat
25Sun6:548.07:446.712:240.81:200.17:054:45Waning Crescent25Sun
26Mon8:008.28:517.01:290.72:27-0.27:044:46Waning Crescent26Mon
27Tue9:038.69:517.32:340.43:28-0.67:034:48Waning Crescent27Tue
28Wed10:029.010:487.73:340.14:24-1.07:024:49New Moon28Wed
29Thu10:599.211:428.04:32-0.25:18-1.37:014:50New Moon29Thu
30Fri11:549.35:27-0.56:09-1.47:004:52New Moon30Fri
31Sat12:338.212:469.26:21-0.66:58-1.36:594:53Waxing Crescent31Sat
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 8:50 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