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 5h 02m 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 - Mar 1928

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu5:075.55:534.512:080.36:345:53Waxing Gibbous1Thu
2Fri6:145.66:544.712:060.41:100.16:325:54Waxing Gibbous2Fri
3Sat7:125.87:475.01:070.22:04-0.16:315:56Waxing Gibbous3Sat
4Sun8:035.98:345.22:010.02:51-0.26:295:57Full Moon4Sun
5Mon8:486.09:165.42:50-0.23:32-0.36:285:58Full Moon5Mon
6Tue9:296.09:555.53:34-0.34:09-0.36:265:59Full Moon6Tue
7Wed10:085.910:325.64:14-0.34:43-0.26:256:00Full Moon7Wed
8Thu10:455.711:075.64:52-0.25:15-0.16:236:01Waning Gibbous8Thu
9Fri11:225.511:425.65:300.05:470.16:226:02Waning Gibbous9Fri
10Sat11:595.26:090.26:200.36:206:03Waning Gibbous10Sat
11Sun12:185.512:384.86:500.46:550.56:196:04Waning Gibbous11Sun
12Mon12:565.41:214.57:350.67:340.76:176:05Third Quarter12Mon
13Tue1:405.32:094.28:250.98:210.96:156:06Third Quarter13Tue
14Wed2:305.23:064.09:221.09:181.06:146:07Third Quarter14Wed
15Thu3:305.14:124.010:251.110:220.96:126:08Third Quarter15Thu
16Fri4:365.25:194.111:290.911:280.86:116:09Waning Crescent16Fri
17Sat5:405.46:184.512:280.76:096:10Waning Crescent17Sat
18Sun6:365.77:094.912:290.51:210.36:086:11Waning Crescent18Sun
19Mon7:266.07:555.41:250.12:09-0.16:066:12Waning Crescent19Mon
20Tue8:136.38:415.82:18-0.32:54-0.56:046:13New Moon20Tue
21Wed9:006.49:256.23:08-0.63:38-0.76:036:14New Moon21Wed
22Thu9:466.410:096.53:57-0.84:21-0.86:016:15New Moon22Thu
23Fri10:326.310:546.64:46-0.85:04-0.76:006:16Waxing Crescent23Fri
24Sat11:206.011:416.65:36-0.75:49-0.55:586:17Waxing Crescent24Sat
25Sun12:105.66:29-0.56:38-0.35:576:18Waxing Crescent25Sun
26Mon12:316.41:065.27:26-0.17:310.15:556:19Waxing Crescent26Mon
27Tue1:276.12:074.88:280.28:300.45:536:20First Quarter27Tue
28Wed2:285.83:164.59:330.59:350.65:526:21First Quarter28Wed
29Thu3:375.54:304.510:430.610:430.75:506:22First Quarter29Thu
30Fri4:515.45:414.611:500.511:500.65:496:23Waxing Gibbous30Fri
31Sat5:595.56:394.912:490.35:476:24Waxing Gibbous31Sat
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