Tides Today & Tomorrow in New Castle, DE

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in New Castle, DE.
Next low tide : in 1h 24m at 11:05 am (0.6 ft)
Next high tide : 4:47 pm (5.8 ft)
Sunset today : 7:54 pm
Sunrise tomorrow : 6:17 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8551201
Common Questions About Tides

New Castle, DE Tides - Mar 1939

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed7:025.27:464.81:270.02:270.16:365:53Waxing Gibbous1Wed
2Thu8:105.48:485.12:35-0.13:28-0.16:345:54Waxing Gibbous2Thu
3Fri9:115.69:445.43:38-0.34:24-0.36:335:55Waxing Gibbous3Fri
4Sat10:075.810:375.64:37-0.65:17-0.56:315:56Full Moon4Sat
5Sun11:005.911:275.85:33-0.76:07-0.76:305:57Full Moon5Sun
6Mon11:515.96:26-0.86:55-0.76:285:58Full Moon6Mon
7Tue12:165.912:405.87:17-0.87:41-0.66:275:59Waning Gibbous7Tue
8Wed1:055.91:305.68:07-0.78:27-0.56:256:00Waning Gibbous8Wed
9Thu1:535.82:205.48:57-0.59:12-0.36:246:02Waning Gibbous9Thu
10Fri2:425.63:115.19:47-0.29:590.06:226:03Waning Gibbous10Fri
11Sat3:335.44:054.910:390.010:480.16:206:04Third Quarter11Sat
12Sun4:275.35:014.811:330.211:400.36:196:05Third Quarter12Sun
13Mon5:235.15:594.712:270.36:176:06Third Quarter13Mon
14Tue6:225.06:574.712:340.41:220.36:166:07Third Quarter14Tue
15Wed7:205.07:524.81:290.32:150.26:146:08Waning Crescent15Wed
16Thu8:145.18:444.92:230.33:060.16:136:09Waning Crescent16Thu
17Fri9:055.29:315.03:160.13:540.06:116:10Waning Crescent17Fri
18Sat9:515.210:155.14:060.04:390.06:096:11Waning Crescent18Sat
19Sun10:335.210:545.24:54-0.15:21-0.16:086:12New Moon19Sun
20Mon11:125.211:305.35:39-0.26:01-0.16:066:13New Moon20Mon
21Tue11:485.26:22-0.26:380.06:056:14New Moon21Tue
22Wed12:025.312:235.17:04-0.17:130.06:036:15New Moon22Wed
23Thu12:325.412:585.17:450.07:480.16:016:16Waxing Crescent23Thu
24Fri1:045.51:365.08:270.18:230.26:006:17Waxing Crescent24Fri
25Sat1:405.62:195.09:110.29:040.25:586:18Waxing Crescent25Sat
26Sun2:255.63:094.910:020.39:540.35:566:19Waxing Crescent26Sun
27Mon3:175.64:084.910:590.410:560.45:556:20First Quarter27Mon
28Tue4:205.55:154.912:010.55:536:21First Quarter28Tue
29Wed5:315.46:245.012:050.41:040.45:526:22First Quarter29Wed
30Thu6:445.57:295.21:140.32:050.35:506:23Waxing Gibbous30Thu
31Fri7:525.68:305.52:200.23:040.15:486:24Waxing Gibbous31Fri
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 1:56 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 36% 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 First Quarter (36% 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