Tides Today & Tomorrow in New Castle, DE

TIDE TIMES for Monday, August 17, 2026
The tide is currently falling in New Castle, DE.
Next low tide : in 3m at 10:23 am (0.4 ft)
Next high tide : 4:00 pm (5.8 ft)
Sunset today : 7:55 pm
Sunrise tomorrow : 6:16 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8551201
Common Questions About Tides

New Castle, DE Tides - Feb 1941

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat2:414.72:584.99:27-0.19:50-0.27:105:21Waxing Crescent1Sat
2Sun3:244.73:454.710:120.010:30-0.27:095:22First Quarter2Sun
3Mon4:104.64:354.511:000.111:14-0.17:085:24First Quarter3Mon
4Tue4:594.65:294.411:530.17:075:25First Quarter4Tue
5Wed5:514.66:254.312:02-0.112:500.17:065:26First Quarter5Wed
6Thu6:464.77:214.312:54-0.11:470.17:055:27Waxing Gibbous6Thu
7Fri7:414.88:154.41:49-0.12:440.07:045:28Waxing Gibbous7Fri
8Sat8:334.99:064.52:45-0.23:39-0.17:035:30Waxing Gibbous8Sat
9Sun9:225.19:534.63:39-0.34:30-0.37:015:31Waxing Gibbous9Sun
10Mon10:085.310:374.84:32-0.55:20-0.47:005:32Full Moon10Mon
11Tue10:535.411:215.05:23-0.66:06-0.56:595:33Full Moon11Tue
12Wed11:375.56:13-0.76:52-0.66:585:34Full Moon12Wed
13Thu12:045.112:225.67:02-0.87:37-0.66:575:35Full Moon13Thu
14Fri12:495.31:095.57:51-0.78:22-0.66:555:37Waning Gibbous14Fri
15Sat1:365.41:595.48:42-0.69:10-0.56:545:38Waning Gibbous15Sat
16Sun2:265.42:535.39:37-0.510:00-0.46:535:39Waning Gibbous16Sun
17Mon3:205.43:515.110:34-0.310:54-0.36:525:40Third Quarter17Mon
18Tue4:205.34:544.911:35-0.111:51-0.26:505:41Third Quarter18Tue
19Wed5:235.25:594.712:37-0.16:495:42Third Quarter19Wed
20Thu6:295.27:044.712:51-0.11:39-0.16:485:44Waning Crescent20Thu
21Fri7:345.28:054.81:51-0.12:39-0.16:465:45Waning Crescent21Fri
22Sat8:345.39:024.92:50-0.23:36-0.26:455:46Waning Crescent22Sat
23Sun9:285.49:545.03:46-0.34:29-0.46:445:47Waning Crescent23Sun
24Mon10:175.510:415.14:39-0.45:18-0.46:425:48New Moon24Mon
25Tue11:025.511:265.25:28-0.46:02-0.46:415:49New Moon25Tue
26Wed11:455.46:13-0.46:43-0.46:395:50New Moon26Wed
27Thu12:085.212:265.36:56-0.47:22-0.36:385:51New Moon27Thu
28Fri12:475.11:055.27:37-0.37:58-0.26:365:52Waxing Crescent28Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8551201)

Common Questions About New Castle, DE Tides

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What time does the tide turn (slack tide) in New Castle, DE today?

Slack tide in New Castle, DE is approximately 1:11 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 New Castle, DE?

New Castle, DE is currently in a transitional phase. Tonight's moon is 27% 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 New Castle, 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 New Castle, DE?

Tide predictions for New Castle, 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 New Castle, DE?

Tide data for New Castle, DE is sourced from NOAA Station #8551201. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8551201.

What is the moon phase in New Castle, DE tonight?

Tonight the moon over New Castle, DE is Waxing Crescent (27% illuminated). This places New Castle, 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