Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Friday, July 17, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 5h 55m at 7:00 am (-0.4 ft)
Next high tide : 12:47 pm (5.7 ft)
Sunset today : 8:26 pm
Sunrise tomorrow : 5:49 am
Moon phase : Waxing Crescent (14% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - Oct 1985

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue11:425.95:470.46:130.56:576:44Waning Gibbous1Tue
2Wed12:025.512:165.96:180.56:520.76:586:43Waning Gibbous2Wed
3Thu12:395.112:515.86:510.77:340.96:596:41Waning Gibbous3Thu
4Fri1:174.81:315.87:280.88:211.27:006:39Waning Gibbous4Fri
5Sat2:004.52:165.68:111.09:141.37:016:38Third Quarter5Sat
6Sun2:494.33:095.59:021.110:121.47:026:36Third Quarter6Sun
7Mon3:484.24:105.510:011.111:131.47:036:35Third Quarter7Mon
8Tue4:554.35:155.611:051.07:046:33Third Quarter8Tue
9Wed6:014.56:195.812:141.112:100.87:056:32Waning Crescent9Wed
10Thu6:594.97:156.11:090.81:110.57:066:30Waning Crescent10Thu
11Fri7:505.58:066.42:000.42:070.27:076:29Waning Crescent11Fri
12Sat8:376.08:546.52:470.03:02-0.27:086:27New Moon12Sat
13Sun9:236.59:426.53:33-0.33:54-0.47:096:26New Moon13Sun
14Mon10:096.810:306.44:18-0.54:46-0.67:106:24New Moon14Mon
15Tue10:567.011:196.25:03-0.55:37-0.57:116:23New Moon15Tue
16Wed11:437.05:49-0.46:30-0.37:126:21Waxing Crescent16Wed
17Thu12:095.812:346.96:37-0.27:25-0.17:136:20Waxing Crescent17Thu
18Fri1:025.41:286.67:290.18:250.37:146:18Waxing Crescent18Fri
19Sat2:015.12:276.28:260.49:270.67:156:17First Quarter19Sat
20Sun3:054.83:315.99:280.710:310.77:166:16First Quarter20Sun
21Mon4:144.64:405.710:320.811:360.87:176:14First Quarter21Mon
22Tue5:254.75:485.611:370.97:186:13First Quarter22Tue
23Wed6:304.96:485.712:360.712:400.87:196:12Waxing Gibbous23Wed
24Thu7:235.27:385.81:290.51:350.67:206:10Waxing Gibbous24Thu
25Fri8:085.48:225.82:140.32:250.57:216:09Waxing Gibbous25Fri
26Sat8:495.79:035.82:540.23:100.37:226:08Waxing Gibbous26Sat
27Sun8:265.88:435.72:310.22:520.36:245:06Full Moon27Sun
28Mon9:026.09:215.63:050.23:320.26:255:05Full Moon28Mon
29Tue9:366.09:585.33:390.34:110.36:265:04Full Moon29Tue
30Wed10:106.010:355.14:120.44:490.46:275:03Full Moon30Wed
31Thu10:446.011:114.84:450.55:290.66:285:02Waning 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 9:53 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 spring phase. Tonight's moon is 14% 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 maximum.

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 (14% illuminated). This places Port Mahon, DE in a spring tide cycle, so tidal ranges are near their weekly maximum 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