Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Thursday, August 20, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 3h 49m at 10:00 am (1.0 ft)
Next high tide : 4:13 pm (5.4 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 - Jan 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun3:365.24:055.110:170.110:410.07:214:48First Quarter1Sun
2Mon4:405.55:125.011:240.011:40-0.17:214:49Waxing Gibbous2Mon
3Tue5:415.86:145.012:29-0.27:214:50Waxing Gibbous3Tue
4Wed6:396.17:125.012:37-0.21:31-0.37:214:51Waxing Gibbous4Wed
5Thu7:346.38:075.11:33-0.42:29-0.57:214:52Full Moon5Thu
6Fri8:266.49:005.12:27-0.53:22-0.67:214:53Full Moon6Fri
7Sat9:176.49:505.13:19-0.54:12-0.57:214:53Full Moon7Sat
8Sun10:066.210:385.04:08-0.54:59-0.47:214:54Full Moon8Sun
9Mon10:536.011:254.94:55-0.35:44-0.37:214:55Waning Gibbous9Mon
10Tue11:395.85:41-0.26:28-0.17:214:56Waning Gibbous10Tue
11Wed12:124.812:245.56:280.17:110.17:204:57Waning Gibbous11Wed
12Thu12:594.81:115.27:150.37:540.37:204:58Waning Gibbous12Thu
13Fri1:464.72:004.98:040.58:370.57:204:59Third Quarter13Fri
14Sat2:354.72:514.68:550.69:210.67:205:00Third Quarter14Sat
15Sun3:264.73:474.49:490.710:080.67:195:01Third Quarter15Sun
16Mon4:204.84:454.310:470.710:590.67:195:02Third Quarter16Mon
17Tue5:155.05:424.311:450.611:500.57:195:04Waning Crescent17Tue
18Wed6:065.26:344.312:410.57:185:05Waning Crescent18Wed
19Thu6:545.47:214.412:400.41:330.37:185:06Waning Crescent19Thu
20Fri7:385.78:064.61:290.22:220.17:175:07Waning Crescent20Fri
21Sat8:225.98:494.72:170.03:07-0.17:175:08New Moon21Sat
22Sun9:046.19:304.83:03-0.23:51-0.27:165:09New Moon22Sun
23Mon9:456.210:125.03:48-0.44:33-0.47:165:10New Moon23Mon
24Tue10:276.210:545.14:32-0.45:15-0.47:155:11Waxing Crescent24Tue
25Wed11:106.211:375.35:17-0.55:57-0.57:145:13Waxing Crescent25Wed
26Thu11:566.06:05-0.46:42-0.47:145:14Waxing Crescent26Thu
27Fri12:245.412:455.86:57-0.37:30-0.37:135:15Waxing Crescent27Fri
28Sat1:155.41:395.47:54-0.18:20-0.27:125:16First Quarter28Sat
29Sun2:105.52:395.08:550.09:150.07:115:17First Quarter29Sun
30Mon3:105.53:444.710:010.210:140.17:115:18First Quarter30Mon
31Tue4:155.54:554.611:110.211:170.17:105:19Waxing Gibbous31Tue
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 1:06 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 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