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 3m 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 - May 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue8:135.58:425.72:160.52:450.26:027:54Waxing Gibbous1Tue
2Wed8:555.59:205.93:030.33:230.16:017:55Waxing Gibbous2Wed
3Thu9:365.59:576.03:460.23:590.16:007:56Full Moon3Thu
4Fri10:155.410:326.14:260.14:330.25:597:57Full Moon4Fri
5Sat10:525.311:066.15:050.15:060.35:587:58Full Moon5Sat
6Sun11:295.111:396.15:430.15:390.45:577:59Full Moon6Sun
7Mon12:054.96:220.36:140.55:568:00Waning Gibbous7Mon
8Tue12:146.112:424.77:020.56:500.65:548:01Waning Gibbous8Tue
9Wed12:526.01:214.57:450.67:320.75:538:01Waning Gibbous9Wed
10Thu1:345.92:064.48:320.88:210.85:528:02Waning Gibbous10Thu
11Fri2:225.72:594.49:220.89:170.95:518:03Third Quarter11Fri
12Sat3:175.63:584.510:170.810:190.95:508:04Third Quarter12Sat
13Sun4:175.65:024.711:130.711:250.75:498:05Third Quarter13Sun
14Mon5:225.66:045.112:100.45:488:06Third Quarter14Mon
15Tue6:255.77:025.712:300.51:050.15:488:07Waning Crescent15Tue
16Wed7:235.87:546.21:320.21:57-0.15:478:08Waning Crescent16Wed
17Thu8:185.98:446.62:32-0.22:48-0.45:468:09Waning Crescent17Thu
18Fri9:115.99:347.03:28-0.53:38-0.55:458:10New Moon18Fri
19Sat10:035.810:247.14:23-0.64:28-0.55:448:11New Moon19Sat
20Sun10:565.711:147.15:17-0.75:18-0.55:438:12New Moon20Sun
21Mon11:485.56:10-0.66:08-0.35:438:12Waxing Crescent21Mon
22Tue12:056.912:425.37:03-0.37:01-0.15:428:13Waxing Crescent22Tue
23Wed12:586.61:395.17:58-0.17:560.25:418:14Waxing Crescent23Wed
24Thu1:546.22:384.98:550.28:540.55:418:15First Quarter24Thu
25Fri2:525.83:394.89:510.49:530.75:408:16First Quarter25Fri
26Sat3:525.54:414.810:460.510:530.95:398:17First Quarter26Sat
27Sun4:535.35:425.011:400.511:530.95:398:17First Quarter27Sun
28Mon5:535.26:365.212:320.55:388:18Waxing Gibbous28Mon
29Tue6:485.17:245.412:510.81:180.55:388:19Waxing Gibbous29Tue
30Wed7:385.18:075.71:440.72:010.45:378:20Waxing Gibbous30Wed
31Thu8:235.18:475.92:320.52:420.45:378:20Waxing Gibbous31Thu
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