Tides Today & Tomorrow in Port Mahon, DE

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Port Mahon, DE.
Next low tide : in 4h 34m at 10:52 am (1.1 ft)
Next high tide : 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 - Jan 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu2:205.12:415.38:480.19:210.07:214:49First Quarter1Thu
2Fri3:185.03:405.09:460.310:130.17:214:50First Quarter2Fri
3Sat4:175.04:404.810:460.411:050.27:214:51First Quarter3Sat
4Sun5:135.15:374.811:440.411:560.27:214:51Waxing Gibbous4Sun
5Mon6:045.36:294.812:380.37:214:52Waxing Gibbous5Mon
6Tue6:515.57:174.812:430.21:280.17:214:53Waxing Gibbous6Tue
7Wed7:345.68:014.91:280.12:140.07:214:54Waxing Gibbous7Wed
8Thu8:155.78:434.92:110.02:57-0.17:214:55Full Moon8Thu
9Fri8:545.89:234.92:52-0.13:38-0.17:214:56Full Moon9Fri
10Sat9:335.910:014.83:32-0.14:16-0.17:214:57Full Moon10Sat
11Sun10:105.910:384.84:11-0.24:54-0.17:204:58Full Moon11Sun
12Mon10:465.811:144.84:50-0.15:310.07:204:59Waning Gibbous12Mon
13Tue11:235.711:514.85:29-0.16:090.07:205:00Waning Gibbous13Tue
14Wed12:015.66:110.06:490.17:195:01Waning Gibbous14Wed
15Thu12:314.912:445.46:560.17:310.17:195:02Waning Gibbous15Thu
16Fri1:165.01:325.27:470.28:180.27:195:03Third Quarter16Fri
17Sat2:075.12:275.08:440.39:100.27:185:04Third Quarter17Sat
18Sun3:045.23:294.99:470.310:080.17:185:05Third Quarter18Sun
19Mon4:065.44:374.810:540.211:100.07:175:07Third Quarter19Mon
20Tue5:115.75:444.812:010.07:175:08Waning Crescent20Tue
21Wed6:136.06:465.012:12-0.21:04-0.37:165:09Waning Crescent21Wed
22Thu7:126.37:445.21:12-0.42:04-0.67:165:10Waning Crescent22Thu
23Fri8:076.68:395.42:09-0.72:59-0.87:155:11New Moon23Fri
24Sat9:016.79:325.63:05-0.93:52-1.07:145:12New Moon24Sat
25Sun9:536.710:235.63:58-1.04:41-1.07:145:13New Moon25Sun
26Mon10:446.511:135.64:49-1.05:29-0.97:135:15Waxing Crescent26Mon
27Tue11:336.25:40-0.86:16-0.77:125:16Waxing Crescent27Tue
28Wed12:025.612:235.96:31-0.57:03-0.47:125:17Waxing Crescent28Wed
29Thu12:525.41:135.57:23-0.27:50-0.27:115:18Waxing Crescent29Thu
30Fri1:435.32:065.18:160.18:380.17:105:19First Quarter30Fri
31Sat2:365.13:014.79:110.49:270.37:095:20First Quarter31Sat
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 2:02 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