Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Monday, August 17, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 5h 10m at 7:50 am (0.2 ft)
Next high tide : 1:47 pm (5.9 ft)
Sunset today : 7:54 pm
Sunrise tomorrow : 6:16 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - Jan 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed2:135.42:395.28:540.09:18-0.17:214:48First Quarter1Wed
2Thu3:135.53:434.99:590.110:160.07:214:49First Quarter2Thu
3Fri4:175.64:514.711:060.111:160.07:214:50Waxing Gibbous3Fri
4Sat5:215.75:564.712:120.07:214:51Waxing Gibbous4Sat
5Sun6:225.86:554.812:160.01:13-0.17:214:52Waxing Gibbous5Sun
6Mon7:176.07:494.91:13-0.12:10-0.27:214:53Waxing Gibbous6Mon
7Tue8:086.08:395.02:06-0.23:01-0.37:214:53Full Moon7Tue
8Wed8:556.09:255.02:56-0.33:47-0.47:214:54Full Moon8Wed
9Thu9:406.010:095.03:42-0.34:28-0.37:214:55Full Moon9Thu
10Fri10:215.910:515.04:24-0.35:07-0.27:214:56Waning Gibbous10Fri
11Sat11:025.711:315.05:05-0.15:45-0.17:204:57Waning Gibbous11Sat
12Sun11:425.55:460.06:210.17:204:58Waning Gibbous12Sun
13Mon12:114.912:225.36:270.26:580.37:204:59Waning Gibbous13Mon
14Tue12:524.91:045.07:110.47:360.47:205:00Waning Gibbous14Tue
15Wed1:344.91:504.67:590.58:170.57:195:01Third Quarter15Wed
16Thu2:204.92:394.48:500.79:020.67:195:03Third Quarter16Thu
17Fri3:114.93:354.19:460.89:540.67:195:04Third Quarter17Fri
18Sat4:084.94:374.110:470.810:500.57:185:05Third Quarter18Sat
19Sun5:075.15:374.111:490.711:480.47:185:06Waning Crescent19Sun
20Mon6:035.46:324.312:460.57:175:07Waning Crescent20Mon
21Tue6:545.77:234.612:440.11:400.27:175:08Waning Crescent21Tue
22Wed7:426.08:104.91:38-0.12:30-0.27:165:09New Moon22Wed
23Thu8:296.28:575.22:30-0.43:17-0.57:165:10New Moon23Thu
24Fri9:156.49:435.43:19-0.74:02-0.77:155:11New Moon24Fri
25Sat10:016.510:285.74:08-0.84:46-0.87:145:13New Moon25Sat
26Sun10:486.411:155.84:57-0.95:30-0.87:145:14Waxing Crescent26Sun
27Mon11:356.25:47-0.86:16-0.77:135:15Waxing Crescent27Mon
28Tue12:035.912:265.86:40-0.67:05-0.67:125:16Waxing Crescent28Tue
29Wed12:545.91:205.47:37-0.37:56-0.37:115:17First Quarter29Wed
30Thu1:495.72:195.08:38-0.18:51-0.17:105:18First Quarter30Thu
31Fri2:495.63:244.69:420.29:510.17:105:20First Quarter31Fri
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 10:48 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 transitional phase. Tonight's moon is 27% 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 Waxing Crescent (27% 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