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 34m at 10:52 pm (0.8 ft)
Next high tide (tomorrow) : 4:16 am (5.5 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 - Apr 1940

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:385.37:135.112:530.51:370.35:466:26Waning Crescent1Mon
2Tue7:355.38:085.21:490.52:290.25:446:27Waning Crescent2Tue
3Wed8:295.38:585.32:440.33:190.15:426:28Waning Crescent3Wed
4Thu9:185.49:445.53:350.24:050.15:416:29Waning Crescent4Thu
5Fri10:035.410:265.54:240.14:490.05:396:30Waning Crescent5Fri
6Sat10:455.411:055.65:110.05:300.05:386:31New Moon6Sat
7Sun11:255.311:415.65:540.06:080.15:366:32New Moon7Sun
8Mon12:025.26:360.06:440.25:356:33New Moon8Mon
9Tue12:135.612:375.17:160.17:180.35:336:34New Moon9Tue
10Wed12:425.61:125.07:560.27:500.35:326:35Waxing Crescent10Wed
11Thu1:115.61:485.08:360.38:240.45:306:36Waxing Crescent11Thu
12Fri1:445.72:285.09:180.49:030.45:286:37Waxing Crescent12Fri
13Sat2:265.73:155.010:040.59:510.55:276:38Waxing Crescent13Sat
14Sun3:165.74:115.010:580.510:520.65:256:39First Quarter14Sun
15Mon4:165.65:145.111:560.55:246:40First Quarter15Mon
16Tue5:255.66:205.212:010.612:570.55:236:41First Quarter16Tue
17Wed6:375.67:235.51:100.51:570.45:216:42Waxing Gibbous17Wed
18Thu7:445.78:235.82:160.32:550.25:206:43Waxing Gibbous18Thu
19Fri8:465.89:186.13:190.13:510.05:186:44Waxing Gibbous19Fri
20Sat9:425.910:106.44:19-0.14:44-0.15:176:45Full Moon20Sat
21Sun10:366.011:006.55:16-0.35:35-0.25:156:46Full Moon21Sun
22Mon11:275.911:496.56:10-0.46:24-0.25:146:47Full Moon22Mon
23Tue12:195.87:02-0.47:13-0.15:136:48Full Moon23Tue
24Wed12:386.51:105.77:53-0.38:010.15:116:49Waning Gibbous24Wed
25Thu1:276.32:025.58:43-0.18:490.35:106:49Waning Gibbous25Thu
26Fri2:186.12:555.39:330.19:380.55:086:50Waning Gibbous26Fri
27Sat3:105.93:505.210:240.310:300.75:076:51Third Quarter27Sat
28Sun5:055.75:475.212:160.46:067:52Third Quarter28Sun
29Mon6:025.56:445.212:240.81:080.56:057:53Third Quarter29Mon
30Tue7:005.47:405.21:190.81:590.56:037:54Third Quarter30Tue
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 1:34 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 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