Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Port Mahon, DE.
Next low tide : 11:58 pm (1.3 ft)
Next high tide : in 3h 54m at 5:12 pm (5.4 ft)
Sunset today : 7:48 pm
Sunrise tomorrow : 6:20 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8554399
Common Questions About Tides

Port Mahon, DE Tides - Mar 1924

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat5:485.86:264.912:380.06:345:53Waning Crescent1Sat
2Sun6:495.97:225.212:460.01:36-0.36:325:54Waning Crescent2Sun
3Mon7:426.18:135.51:44-0.32:27-0.46:315:56Waning Crescent3Mon
4Tue8:316.28:585.72:36-0.43:13-0.66:295:57New Moon4Tue
5Wed9:166.29:415.83:23-0.53:54-0.66:285:58New Moon5Wed
6Thu9:586.110:215.84:07-0.54:32-0.56:265:59New Moon6Thu
7Fri10:385.910:595.84:48-0.45:09-0.36:256:00Waxing Crescent7Fri
8Sat11:185.711:365.75:28-0.25:44-0.16:236:01Waxing Crescent8Sat
9Sun11:575.46:080.06:200.26:226:02Waxing Crescent9Sun
10Mon12:155.612:395.16:490.36:570.46:206:03Waxing Crescent10Mon
11Tue12:555.41:244.77:340.57:390.66:196:04First Quarter11Tue
12Wed1:395.32:134.58:230.88:250.76:176:05First Quarter12Wed
13Thu2:295.13:094.39:170.99:190.86:166:06First Quarter13Thu
14Fri3:255.14:114.210:171.010:180.86:146:07First Quarter14Fri
15Sat4:285.15:144.311:180.911:200.76:126:08First Quarter15Sat
16Sun5:295.36:104.612:150.76:116:09Waxing Gibbous16Sun
17Mon6:245.57:005.012:180.51:070.36:096:10Waxing Gibbous17Mon
18Tue7:135.87:455.41:130.11:550.06:086:11Waxing Gibbous18Tue
19Wed7:596.18:295.82:04-0.22:40-0.36:066:12Full Moon19Wed
20Thu8:446.39:126.12:54-0.53:24-0.66:046:13Full Moon20Thu
21Fri9:286.39:546.43:41-0.74:07-0.76:036:14Full Moon21Fri
22Sat10:136.310:386.54:29-0.84:50-0.76:016:15Full Moon22Sat
23Sun11:006.111:246.65:17-0.75:35-0.66:006:16Waning Gibbous23Sun
24Mon11:495.96:08-0.66:23-0.45:586:17Waning Gibbous24Mon
25Tue12:136.512:425.57:03-0.37:16-0.15:576:18Waning Gibbous25Tue
26Wed1:076.31:415.18:02-0.18:130.15:556:19Third Quarter26Wed
27Thu2:076.02:464.99:050.29:150.45:536:20Third Quarter27Thu
28Fri3:125.83:574.710:110.310:220.55:526:21Third Quarter28Fri
29Sat4:235.65:094.811:170.311:280.45:506:22Waning Crescent29Sat
30Sun5:325.76:135.112:190.15:496:23Waning Crescent30Sun
31Mon6:325.87:065.412:310.21:140.05:476:24Waning Crescent31Mon
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 8:35 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 transitional phase. Tonight's moon is 65% 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 First Quarter (65% 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