Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Port Mahon, DE.
Next low tide : 9:08 pm (0.8 ft)
Next high tide : in 2h 49m at 2:32 pm (5.7 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 - Jan 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:535.01:115.47:160.17:520.17:214:49Waxing Crescent1Sun
2Mon1:445.02:025.18:080.38:370.27:214:50First Quarter2Mon
3Tue2:354.92:544.89:010.59:220.47:214:51First Quarter3Tue
4Wed3:274.93:504.59:560.710:100.57:214:51First Quarter4Wed
5Thu4:214.94:484.310:540.710:590.67:214:52First Quarter5Thu
6Fri5:145.05:454.311:510.611:490.67:214:53Waxing Gibbous6Fri
7Sat6:055.26:374.312:460.57:214:54Waxing Gibbous7Sat
8Sun6:535.47:244.412:380.41:360.47:214:55Waxing Gibbous8Sun
9Mon7:385.68:084.51:260.32:230.27:214:56Waxing Gibbous9Mon
10Tue8:205.78:504.52:110.13:070.17:204:57Full Moon10Tue
11Wed9:015.89:294.62:550.03:480.07:204:58Full Moon11Wed
12Thu9:395.910:074.73:38-0.24:26-0.17:204:59Full Moon12Thu
13Fri10:175.910:444.94:19-0.25:04-0.17:205:00Full Moon13Fri
14Sat10:555.911:235.05:01-0.25:42-0.17:195:01Waning Gibbous14Sat
15Sun11:345.85:44-0.26:21-0.17:195:02Waning Gibbous15Sun
16Mon12:045.112:175.66:30-0.17:02-0.17:195:03Waning Gibbous16Mon
17Tue12:495.31:055.37:220.07:470.07:185:04Third Quarter17Tue
18Wed1:395.41:595.08:190.28:380.17:185:05Third Quarter18Wed
19Thu2:345.43:014.79:220.39:350.27:175:07Third Quarter19Thu
20Fri3:375.54:104.410:310.310:390.27:175:08Third Quarter20Fri
21Sat4:455.65:234.411:420.211:450.27:165:09Waning Crescent21Sat
22Sun5:535.86:304.512:500.07:165:10Waning Crescent22Sun
23Mon6:566.07:314.712:500.01:52-0.27:155:11Waning Crescent23Mon
24Tue7:546.28:264.91:50-0.32:48-0.47:145:12New Moon24Tue
25Wed8:486.39:175.22:46-0.53:38-0.67:145:13New Moon25Wed
26Thu9:386.310:065.33:38-0.74:24-0.67:135:15New Moon26Thu
27Fri10:246.210:515.44:27-0.75:06-0.67:125:16New Moon27Fri
28Sat11:086.011:345.45:13-0.55:47-0.47:125:17Waxing Crescent28Sat
29Sun11:525.75:59-0.36:26-0.27:115:18Waxing Crescent29Sun
30Mon12:175.312:355.36:440.07:060.07:105:19Waxing Crescent30Mon
31Tue1:015.21:204.97:310.37:460.37:095:20First Quarter31Tue
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 5:50 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