Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Castine, ME.
Next low tide : in 30m at 10:21 pm (0.8 ft)
Next high tide (tomorrow) : 4:32 am (9.4 ft)
Sunset today : 7:35 pm
Sunrise tomorrow : 5:42 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8414672
Common Questions About Tides

Castine, ME Tides - Mar 1937

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon1:1310.51:3710.07:260.27:410.76:125:22Waning Gibbous1Mon
2Tue1:5210.22:189.58:070.68:211.26:105:23Waning Gibbous2Tue
3Wed2:339.93:039.08:511.09:041.66:095:25Third Quarter3Wed
4Thu3:189.63:528.69:391.39:522.06:075:26Third Quarter4Thu
5Fri4:099.34:478.310:331.510:472.26:055:27Third Quarter5Fri
6Sat5:059.15:478.211:311.611:462.26:035:29Third Quarter6Sat
7Sun6:049.26:468.412:301.46:025:30Waning Crescent7Sun
8Mon7:029.57:408.812:451.91:251.16:005:31Waning Crescent8Mon
9Tue7:559.98:299.41:401.52:150.65:585:33Waning Crescent9Tue
10Wed8:4510.59:1310.12:300.93:010.05:565:34Waning Crescent10Wed
11Thu9:3111.09:5610.83:170.23:44-0.55:555:35New Moon11Thu
12Fri10:1611.410:3811.44:02-0.54:26-0.95:535:36New Moon12Fri
13Sat11:0111.711:2111.94:47-1.05:09-1.15:515:38New Moon13Sat
14Sun11:4711.75:33-1.45:53-1.15:495:39Waxing Crescent14Sun
15Mon12:0612.112:3511.66:21-1.56:40-0.95:475:40Waxing Crescent15Mon
16Tue12:5412.11:2611.27:12-1.47:30-0.55:455:41Waxing Crescent16Tue
17Wed1:4411.92:2110.78:06-1.18:240.05:445:43Waxing Crescent17Wed
18Thu2:4011.53:2110.19:05-0.69:240.55:425:44First Quarter18Thu
19Fri3:4211.04:279.710:10-0.210:310.95:405:45First Quarter19Fri
20Sat4:5010.55:379.411:190.211:421.05:385:47First Quarter20Sat
21Sun6:0110.36:469.512:270.25:365:48Waxing Gibbous21Sun
22Mon7:0910.37:489.812:510.91:310.15:345:49Waxing Gibbous22Mon
23Tue8:1010.58:4310.21:540.62:280.05:335:50Waxing Gibbous23Tue
24Wed9:0410.79:3110.52:500.23:18-0.25:315:51Waxing Gibbous24Wed
25Thu9:5210.810:1410.73:39-0.14:02-0.25:295:53Full Moon25Thu
26Fri10:3510.810:5310.94:24-0.34:43-0.15:275:54Full Moon26Fri
27Sat11:1510.611:2910.95:04-0.35:200.15:255:55Full Moon27Sat
28Sun11:5310.45:43-0.35:560.45:235:56Full Moon28Sun
29Mon12:0510.712:3110.16:20-0.16:310.75:215:58Waning Gibbous29Mon
30Tue12:4010.61:089.86:570.27:071.15:205:59Waning Gibbous30Tue
31Wed1:1610.31:479.57:350.57:451.45:186:00Waning Gibbous31Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8414672)

Common Questions About Castine, ME Tides

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

Slack tide in Castine, ME is approximately 1:26 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 Castine, ME?

Castine, ME 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 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 (36% 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