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 1h 28m 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 - Aug 1927

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:276.012:595.27:100.37:120.56:018:14Waxing Crescent1Mon
2Tue1:075.81:405.27:470.47:540.76:018:13Waxing Crescent2Tue
3Wed1:485.52:215.28:240.68:400.86:028:12Waxing Crescent3Wed
4Thu2:315.23:045.29:020.79:291.06:038:11First Quarter4Thu
5Fri3:184.93:515.29:440.810:221.16:048:10First Quarter5Fri
6Sat4:094.64:445.310:300.911:211.26:058:09First Quarter6Sat
7Sun5:074.45:405.411:230.96:068:08First Quarter7Sun
8Mon6:094.46:375.612:221.112:200.86:078:07Waxing Gibbous8Mon
9Tue7:074.57:315.91:231.01:180.76:088:05Waxing Gibbous9Tue
10Wed8:014.78:216.22:190.72:140.46:098:04Waxing Gibbous10Wed
11Thu8:515.09:106.53:120.43:080.26:108:03Full Moon11Thu
12Fri9:405.29:576.74:010.14:000.06:118:02Full Moon12Fri
13Sat10:275.510:456.84:48-0.24:50-0.26:118:00Full Moon13Sat
14Sun11:145.811:326.85:33-0.45:39-0.36:127:59Full Moon14Sun
15Mon12:016.06:18-0.56:30-0.36:137:58Waning Gibbous15Mon
16Tue12:206.712:506.17:04-0.57:23-0.26:147:57Waning Gibbous16Tue
17Wed1:096.41:406.27:51-0.48:180.06:157:55Waning Gibbous17Wed
18Thu2:026.02:336.28:41-0.29:170.26:167:54Third Quarter18Thu
19Fri2:595.63:306.19:330.110:190.46:177:53Third Quarter19Fri
20Sat4:005.24:316.010:290.311:240.66:187:51Third Quarter20Sat
21Sun5:064.95:366.011:280.56:197:50Waning Crescent21Sun
22Mon6:144.86:416.012:310.612:300.56:207:48Waning Crescent22Mon
23Tue7:184.97:396.11:350.51:300.56:217:47Waning Crescent23Tue
24Wed8:135.18:316.22:330.42:260.46:227:46Waning Crescent24Wed
25Thu9:045.29:186.33:240.23:160.36:227:44New Moon25Thu
26Fri9:495.410:016.34:090.14:030.36:237:43New Moon26Fri
27Sat10:325.510:426.34:490.14:450.36:247:41New Moon27Sat
28Sun11:115.511:206.25:250.15:250.36:257:40New Moon28Sun
29Mon11:485.511:576.05:590.26:030.46:267:38Waxing Crescent29Mon
30Tue12:245.66:320.36:420.56:277:37Waxing Crescent30Tue
31Wed12:345.71:005.67:050.57:220.76:287:35Waxing Crescent31Wed
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