Tides Today & Tomorrow in New Castle, DE

TIDE TIMES for Monday, August 17, 2026
The tide is currently rising in New Castle, DE.
Next low tide : 10:52 pm (0.8 ft)
Next high tide : in 3h 56m at 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 - Dec 1940

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:235.312:416.07:16-0.37:58-0.47:044:38Waxing Crescent1Sun
2Mon1:115.11:355.88:04-0.28:46-0.27:054:38Waxing Crescent2Mon
3Tue2:055.02:235.68:520.09:34-0.17:064:38Waxing Crescent3Tue
4Wed2:594.93:175.49:400.110:220.07:074:38First Quarter4Wed
5Thu3:534.84:115.210:340.311:100.07:074:38First Quarter5Thu
6Fri4:474.85:055.011:220.311:580.07:084:38First Quarter6Fri
7Sat5:414.85:594.912:160.37:094:38First Quarter7Sat
8Sun6:354.96:534.912:520.01:160.37:104:38First Quarter8Sun
9Mon7:295.07:474.81:40-0.12:100.27:114:38Waxing Gibbous9Mon
10Tue8:175.18:354.82:28-0.13:040.17:124:38Waxing Gibbous10Tue
11Wed9:055.29:234.83:10-0.23:52-0.17:134:38Waxing Gibbous11Wed
12Thu9:475.310:114.73:58-0.24:40-0.27:134:38Waxing Gibbous12Thu
13Fri10:295.310:534.74:46-0.25:28-0.27:144:38Full Moon13Fri
14Sat11:055.311:294.65:28-0.26:16-0.27:154:38Full Moon14Sat
15Sun11:415.36:10-0.26:58-0.27:164:39Full Moon15Sun
16Mon12:114.612:175.46:52-0.27:40-0.27:164:39Full Moon16Mon
17Tue12:474.612:535.47:34-0.28:22-0.27:174:39Waning Gibbous17Tue
18Wed1:294.61:355.48:16-0.29:10-0.17:184:40Waning Gibbous18Wed
19Thu2:114.72:235.49:04-0.19:52-0.17:184:40Waning Gibbous19Thu
20Fri3:054.83:175.39:58-0.110:46-0.27:194:40Third Quarter20Fri
21Sat3:594.94:175.210:580.011:40-0.27:194:41Third Quarter21Sat
22Sun4:595.05:235.112:040.07:204:41Third Quarter22Sun
23Mon6:055.26:295.012:34-0.31:10-0.17:204:42Third Quarter23Mon
24Tue7:055.37:355.01:34-0.32:10-0.27:214:43Waning Crescent24Tue
25Wed8:055.58:355.02:28-0.43:16-0.37:214:43Waning Crescent25Wed
26Thu9:055.79:295.03:28-0.54:10-0.57:214:44Waning Crescent26Thu
27Fri9:595.810:235.04:22-0.65:10-0.67:224:44New Moon27Fri
28Sat10:475.811:175.05:16-0.65:58-0.67:224:45New Moon28Sat
29Sun11:355.76:04-0.66:46-0.67:224:46New Moon29Sun
30Mon12:055.012:235.66:52-0.57:34-0.67:224:47Waxing Crescent30Mon
31Tue12:534.91:115.57:40-0.48:22-0.57:234:47Waxing Crescent31Tue
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 7:26 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