Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently rising in Port Mahon, DE.
Next low tide : 3:20 pm (-0.1 ft)
Next high tide : in 3h 14m at 9:02 am (5.2 ft)
Sunset today : 8:02 pm
Sunrise tomorrow : 6:11 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - May 1944

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon4:595.15:504.611:480.911:511.16:027:54First Quarter1Mon
2Tue6:005.16:444.812:400.86:017:55Waxing Gibbous2Tue
3Wed6:555.27:325.112:480.91:280.66:007:56Waxing Gibbous3Wed
4Thu7:445.38:155.51:410.72:120.45:597:57Waxing Gibbous4Thu
5Fri8:285.48:555.72:310.42:530.35:587:58Waxing Gibbous5Fri
6Sat9:095.59:326.03:180.23:330.15:577:59Full Moon6Sat
7Sun9:495.510:096.24:020.14:120.05:558:00Full Moon7Sun
8Mon10:285.410:466.34:450.04:500.05:548:01Full Moon8Mon
9Tue11:075.311:236.45:280.05:300.05:538:02Full Moon9Tue
10Wed11:485.26:110.06:100.15:528:03Waning Gibbous10Wed
11Thu12:046.412:325.16:570.16:550.25:518:04Waning Gibbous11Thu
12Fri12:486.41:205.07:460.27:450.35:508:04Waning Gibbous12Fri
13Sat1:386.32:154.98:400.28:420.45:498:05Waning Gibbous13Sat
14Sun2:346.13:164.99:380.39:440.55:488:06Third Quarter14Sun
15Mon3:366.04:225.010:370.310:500.55:478:07Third Quarter15Mon
16Tue4:435.85:295.211:380.211:570.45:478:08Third Quarter16Tue
17Wed5:515.86:335.612:370.05:468:09Waning Crescent17Wed
18Thu6:555.97:306.01:020.11:32-0.25:458:10Waning Crescent18Thu
19Fri7:525.98:216.42:03-0.12:25-0.35:448:11Waning Crescent19Fri
20Sat8:465.99:106.63:01-0.43:14-0.45:438:12New Moon20Sat
21Sun9:365.89:576.73:54-0.54:02-0.45:438:13New Moon21Sun
22Mon10:255.710:436.74:44-0.54:47-0.35:428:13New Moon22Mon
23Tue11:125.511:276.65:32-0.45:31-0.25:418:14New Moon23Tue
24Wed11:585.36:17-0.26:140.15:418:15Waxing Crescent24Wed
25Thu12:106.412:445.17:020.06:570.35:408:16Waxing Crescent25Thu
26Fri12:546.11:324.97:480.37:420.65:398:17Waxing Crescent26Fri
27Sat1:395.82:214.78:340.58:290.85:398:17Waxing Crescent27Sat
28Sun2:275.63:124.69:200.79:191.05:388:18First Quarter28Sun
29Mon3:185.34:054.610:080.810:121.15:388:19First Quarter29Mon
30Tue4:135.25:014.710:570.811:081.15:378:20First Quarter30Tue
31Wed5:105.05:564.911:460.85:378:20First Quarter31Wed
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 12:11 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 spring phase. Tonight's moon is 2% 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 maximum.

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 New Moon (2% illuminated). This places Port Mahon, DE in a spring tide cycle, so tidal ranges are near their weekly maximum 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