Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 4h 02m at 9:08 pm (0.8 ft)
Next high tide (tomorrow) : 2:51 am (4.9 ft)
Sunset today : 7:53 pm
Sunrise tomorrow : 6:17 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - May 1932

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:315.38:025.41:320.82:000.46:027:54Waning Crescent1Sun
2Mon8:165.48:415.72:210.62:390.36:017:55Waning Crescent2Mon
3Tue8:575.49:185.93:060.43:160.36:007:56Waning Crescent3Tue
4Wed9:385.39:536.03:490.23:520.35:597:57New Moon4Wed
5Thu10:165.210:286.14:290.24:260.35:587:58New Moon5Thu
6Fri10:545.011:026.15:080.25:010.35:577:59New Moon6Fri
7Sat11:304.911:366.15:470.35:360.45:568:00New Moon7Sat
8Sun12:064.76:270.46:130.55:548:01Waxing Crescent8Sun
9Mon12:136.112:444.67:080.66:520.65:538:02Waxing Crescent9Mon
10Tue12:536.01:274.57:530.77:380.65:528:02Waxing Crescent10Tue
11Wed1:385.92:164.48:410.88:300.75:518:03Waxing Crescent11Wed
12Thu2:295.83:124.59:330.89:290.85:508:04First Quarter12Thu
13Fri3:265.74:134.710:280.710:330.75:498:05First Quarter13Fri
14Sat4:285.65:165.011:240.511:390.65:488:06First Quarter14Sat
15Sun5:335.66:175.512:200.35:488:07Waxing Gibbous15Sun
16Mon6:365.67:136.012:450.31:130.15:478:08Waxing Gibbous16Mon
17Tue7:355.78:056.51:470.02:06-0.15:468:09Waxing Gibbous17Tue
18Wed8:305.78:566.82:47-0.32:57-0.35:458:10Full Moon18Wed
19Thu9:235.69:477.03:44-0.53:48-0.45:448:11Full Moon19Thu
20Fri10:165.510:387.04:39-0.54:39-0.35:438:12Full Moon20Fri
21Sat11:095.311:296.95:32-0.55:29-0.25:438:12Full Moon21Sat
22Sun12:015.26:24-0.36:200.05:428:13Waning Gibbous22Sun
23Mon12:206.612:555.07:17-0.17:130.25:418:14Waning Gibbous23Mon
24Tue1:136.31:514.88:100.28:080.55:418:15Waning Gibbous24Tue
25Wed2:085.92:494.79:040.49:050.75:408:16Third Quarter25Wed
26Thu3:045.63:484.79:560.610:020.95:398:17Third Quarter26Thu
27Fri4:015.34:464.810:470.610:591.05:398:17Third Quarter27Fri
28Sat4:595.15:434.911:370.711:581.05:388:18Third Quarter28Sat
29Sun5:565.06:345.212:240.75:388:19Waning Crescent29Sun
30Mon6:504.97:205.412:540.91:090.65:378:20Waning Crescent30Mon
31Tue7:394.98:035.71:460.81:520.65:378:20Waning Crescent31Tue
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 11:59 pm — 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 transitional phase. Tonight's moon is 36% 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 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 (36% illuminated). This places Port Mahon, DE 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