Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 2h 03m at 10:37 pm (0.9 ft)
Next high tide (tomorrow) : 4:24 am (4.7 ft)
Sunset today : 8:23 pm
Sunrise tomorrow : 5:52 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - Jan 1984

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:566.08:234.91:55-0.12:43-0.27:204:48New Moon1Sun
2Mon8:406.09:094.82:41-0.13:29-0.27:214:49New Moon2Mon
3Tue9:235.99:524.83:240.04:11-0.17:214:50New Moon3Tue
4Wed10:045.910:334.74:050.04:510.07:214:51New Moon4Wed
5Thu10:455.811:124.64:440.15:300.17:214:52Waxing Crescent5Thu
6Fri11:245.611:524.55:230.26:080.27:214:53Waxing Crescent6Fri
7Sat12:055.46:030.36:470.47:214:54Waxing Crescent7Sat
8Sun12:324.512:475.26:460.47:260.57:214:55Waxing Crescent8Sun
9Mon1:144.51:315.07:320.58:070.57:214:56First Quarter9Mon
10Tue1:594.52:184.78:230.68:510.67:204:57First Quarter10Tue
11Wed2:484.63:114.59:190.79:380.57:204:58First Quarter11Wed
12Thu3:414.84:094.410:190.710:310.57:204:59First Quarter12Thu
13Fri4:395.05:104.311:210.611:270.37:205:00Waxing Gibbous13Fri
14Sat5:365.36:084.412:230.47:195:01Waxing Gibbous14Sat
15Sun6:305.77:034.612:230.11:200.27:195:02Waxing Gibbous15Sun
16Mon7:216.07:554.81:18-0.12:15-0.17:195:03Waxing Gibbous16Mon
17Tue8:126.38:465.02:12-0.43:08-0.47:185:04Full Moon17Tue
18Wed9:036.59:365.23:05-0.63:58-0.67:185:05Full Moon18Wed
19Thu9:536.610:265.33:57-0.84:47-0.87:175:06Full Moon19Thu
20Fri10:446.611:165.54:48-0.95:35-0.87:175:07Waning Gibbous20Fri
21Sat11:346.45:40-0.86:24-0.77:165:08Waning Gibbous21Sat
22Sun12:085.512:276.16:35-0.77:14-0.67:165:09Waning Gibbous22Sun
23Mon1:015.51:215.77:31-0.48:05-0.47:155:11Third Quarter23Mon
24Tue1:565.52:185.38:30-0.28:57-0.17:155:12Third Quarter24Tue
25Wed2:545.43:194.99:320.09:520.17:145:13Third Quarter25Wed
26Thu3:555.44:244.610:360.210:500.27:135:14Third Quarter26Thu
27Fri4:575.45:294.511:410.211:480.37:125:15Waning Crescent27Fri
28Sat5:565.46:284.512:420.27:125:16Waning Crescent28Sat
29Sun6:505.57:214.612:430.31:380.17:115:18Waning Crescent29Sun
30Mon7:385.68:094.71:340.22:270.07:105:19Waning Crescent30Mon
31Tue8:235.78:534.82:210.13:11-0.17:095:20New Moon31Tue
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 1:30 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 52% 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 (52% 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