Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Thursday, August 20, 2026
The tide is currently rising in Port Mahon, DE.
Next low tide : 10:00 am (1.0 ft)
Next high tide : in 1h 08m at 3:44 am (4.6 ft)
Sunset today : 7:50 pm
Sunrise tomorrow : 6:19 am
Moon phase : First Quarter (55% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - Jul 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:214.79:356.13:360.43:280.45:388:31Full Moon1Sun
2Mon10:034.710:156.24:200.34:100.45:398:31Full Moon2Mon
3Tue10:444.810:546.25:030.24:520.35:398:31Full Moon3Tue
4Wed11:234.811:336.35:430.25:340.35:408:31Full Moon4Wed
5Thu12:024.96:230.26:160.35:408:31Waning Gibbous5Thu
6Fri12:126.312:425.07:040.17:000.35:418:30Waning Gibbous6Fri
7Sat12:546.21:265.17:460.17:480.45:428:30Waning Gibbous7Sat
8Sun1:396.12:135.28:310.18:410.45:428:30Waning Gibbous8Sun
9Mon2:295.93:045.49:170.19:380.55:438:29Third Quarter9Mon
10Tue3:235.74:005.610:060.110:390.55:438:29Third Quarter10Tue
11Wed4:235.45:005.811:000.211:460.55:448:29Third Quarter11Wed
12Thu5:285.26:026.111:580.25:458:28Waning Crescent12Thu
13Fri6:355.17:036.312:530.312:580.15:468:28Waning Crescent13Fri
14Sat7:385.18:026.61:580.21:580.05:468:27Waning Crescent14Sat
15Sun8:375.18:586.73:000.02:56-0.15:478:27New Moon15Sun
16Mon9:335.29:526.83:58-0.23:52-0.25:488:26New Moon16Mon
17Tue10:285.310:446.74:51-0.34:45-0.25:498:26New Moon17Tue
18Wed11:195.411:346.65:40-0.35:36-0.25:498:25New Moon18Wed
19Thu12:085.46:26-0.26:250.05:508:24Waxing Crescent19Thu
20Fri12:216.312:565.47:11-0.17:130.25:518:24Waxing Crescent20Fri
21Sat1:076.01:445.37:550.18:010.45:528:23Waxing Crescent21Sat
22Sun1:545.72:315.38:370.38:500.75:538:22First Quarter22Sun
23Mon2:415.43:195.29:190.59:400.95:538:21First Quarter23Mon
24Tue3:305.14:085.210:020.710:321.05:548:21First Quarter24Tue
25Wed4:234.84:595.210:470.811:281.15:558:20First Quarter25Wed
26Thu5:214.55:545.311:350.95:568:19First Quarter26Thu
27Fri6:204.46:475.512:271.112:270.95:578:18Waxing Gibbous27Fri
28Sat7:154.57:375.71:241.01:180.85:588:17Waxing Gibbous28Sat
29Sun8:064.58:235.92:180.82:090.75:598:16Waxing Gibbous29Sun
30Mon8:534.79:086.13:080.62:580.55:598:15Waxing Gibbous30Mon
31Tue9:374.89:506.33:540.43:450.36:008:14Full Moon31Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8554399)

Common Questions About Port Mahon, DE Tides

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What time does the tide turn (slack tide) in Port Mahon, DE today?

Slack tide in Port Mahon, DE is approximately 6:52 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 Port Mahon, DE?

Port Mahon, DE is currently in a neap phase. Tonight's moon is 55% 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 Port Mahon, DE 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 Port Mahon, DE?

Tide predictions for Port Mahon, DE 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 Port Mahon, DE?

Tide data for Port Mahon, DE is sourced from NOAA Station #8554399. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8554399.

What is the moon phase in Port Mahon, DE tonight?

Tonight the moon over Port Mahon, DE is First Quarter (55% illuminated). This places Port Mahon, DE 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