Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Castine, ME.
Next low tide (tomorrow) : 1:11 am (1.6 ft)
Next high tide : in 5h 48m at 6:42 pm (9.5 ft)
Sunset today : 7:31 pm
Sunrise tomorrow : 5:45 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8414672
Common Questions About Tides

Castine, ME Tides - Sep 1930

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:359.06:5210.012:180.812:341.85:577:13First Quarter1Mon
2Tue7:388.87:539.91:201.01:362.05:587:11Waxing Gibbous2Tue
3Wed8:378.88:5010.02:201.02:341.95:597:09Waxing Gibbous3Wed
4Thu9:309.09:4010.13:140.93:261.76:007:07Waxing Gibbous4Thu
5Fri10:159.210:2510.34:020.74:121.46:017:06Waxing Gibbous5Fri
6Sat10:569.511:0510.54:440.64:541.26:037:04Full Moon6Sat
7Sun11:329.811:4210.55:220.55:321.06:047:02Full Moon7Sun
8Mon12:0610.05:560.46:080.96:057:00Full Moon8Mon
9Tue12:1710.512:3810.26:280.56:420.86:066:58Full Moon9Tue
10Wed12:5110.41:1010.37:000.67:170.76:076:56Waning Gibbous10Wed
11Thu1:2610.21:4210.47:310.77:520.76:086:55Waning Gibbous11Thu
12Fri2:0210.02:1710.48:050.98:310.76:096:53Waning Gibbous12Fri
13Sat2:419.72:5610.48:421.29:140.86:116:51Waning Gibbous13Sat
14Sun3:269.43:4110.39:251.410:030.86:126:49Third Quarter14Sun
15Mon4:179.14:3410.210:151.611:000.96:136:47Third Quarter15Mon
16Tue5:168.95:3410.211:131.86:146:45Third Quarter16Tue
17Wed6:228.96:4110.312:050.912:191.86:156:43Waning Crescent17Wed
18Thu7:309.17:5010.71:130.61:291.46:166:41Waning Crescent18Thu
19Fri8:359.78:5411.22:190.22:350.96:186:40Waning Crescent19Fri
20Sat9:3410.39:5311.73:19-0.43:360.26:196:38Waning Crescent20Sat
21Sun10:2811.010:4912.14:14-0.94:33-0.56:206:36New Moon21Sun
22Mon11:1811.611:4112.25:05-1.25:26-1.06:216:34New Moon22Mon
23Tue12:0712.05:54-1.36:18-1.36:226:32New Moon23Tue
24Wed12:3212.112:5412.16:41-1.17:09-1.36:236:30Waxing Crescent24Wed
25Thu1:2211.71:4212.07:29-0.68:00-1.06:256:28Waxing Crescent25Thu
26Fri2:1411.12:3111.68:180.08:52-0.66:266:26Waxing Crescent26Fri
27Sat3:0610.43:2211.09:090.79:460.06:276:25Waxing Crescent27Sat
28Sun3:029.83:1610.49:031.39:440.65:285:23First Quarter28Sun
29Mon4:019.24:169.910:011.910:451.15:295:21First Quarter29Mon
30Tue5:048.85:199.611:032.211:471.35:315:19First Quarter30Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8414672)

Common Questions About Castine, ME Tides

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What time does the tide turn (slack tide) in Castine, ME today?

Slack tide in Castine, ME is approximately 9:56 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 Castine, ME?

Castine, ME is currently in a transitional phase. Tonight's moon is 65% 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 Castine, ME 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 Castine, ME?

Tide predictions for Castine, ME 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 Castine, ME?

Tide data for Castine, ME is sourced from NOAA Station #8414672. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8414672.

What is the moon phase in Castine, ME tonight?

Tonight the moon over Castine, ME is First Quarter (65% illuminated). This places Castine, ME 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