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 1h 02m 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 - Mar 1941

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat1:255.11:455.18:17-0.28:33-0.16:355:54Waxing Crescent1Sat
2Sun2:035.02:254.98:560.09:070.06:335:55Waxing Crescent2Sun
3Mon2:405.03:074.89:380.19:420.06:325:56Waxing Crescent3Mon
4Tue3:185.03:534.610:220.210:220.16:305:57First Quarter4Tue
5Wed4:014.94:444.511:130.311:100.26:295:58First Quarter5Wed
6Thu4:524.95:404.412:090.36:275:59First Quarter6Thu
7Fri5:494.96:384.512:060.21:080.36:266:00First Quarter7Fri
8Sat6:515.07:364.61:070.22:060.36:246:01Waxing Gibbous8Sat
9Sun7:515.18:304.82:090.13:030.16:236:02Waxing Gibbous9Sun
10Mon8:475.39:205.03:09-0.13:570.06:216:03Waxing Gibbous10Mon
11Tue9:385.510:085.34:06-0.34:48-0.26:206:04Waxing Gibbous11Tue
12Wed10:285.710:545.55:01-0.45:37-0.46:186:05Full Moon12Wed
13Thu11:165.811:405.85:53-0.66:24-0.46:166:06Full Moon13Thu
14Fri12:045.86:45-0.77:11-0.56:156:07Full Moon14Fri
15Sat12:275.912:535.77:36-0.67:58-0.46:136:08Waning Gibbous15Sat
16Sun1:165.91:455.68:29-0.58:47-0.36:126:09Waning Gibbous16Sun
17Mon2:075.92:395.49:23-0.49:38-0.16:106:10Waning Gibbous17Mon
18Tue3:025.83:385.210:19-0.210:320.06:096:11Third Quarter18Tue
19Wed4:015.64:395.011:180.011:300.26:076:12Third Quarter19Wed
20Thu5:045.55:435.012:180.16:056:13Third Quarter20Thu
21Fri6:105.46:475.012:310.31:180.26:046:14Third Quarter21Fri
22Sat7:145.47:485.11:310.22:160.16:026:15Waning Crescent22Sat
23Sun8:135.48:435.32:290.23:110.06:006:16Waning Crescent23Sun
24Mon9:075.59:335.43:250.14:02-0.15:596:17Waning Crescent24Mon
25Tue9:555.510:195.54:17-0.14:48-0.15:576:18Waning Crescent25Tue
26Wed10:395.511:025.65:05-0.15:32-0.25:566:19New Moon26Wed
27Thu11:215.511:425.65:50-0.26:12-0.15:546:20New Moon27Thu
28Fri12:015.46:33-0.16:490.05:526:21New Moon28Fri
29Sat12:195.512:395.37:13-0.17:240.15:516:22New Moon29Sat
30Sun12:545.51:175.17:520.07:570.25:496:23Waxing Crescent30Sun
31Mon1:265.41:555.08:310.28:280.35:486:24Waxing Crescent31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8551201)

Common Questions About New Castle, DE Tides

Show All
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