Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Castine, ME.
Next low tide : in 1h 34m at 12:24 pm (2.3 ft)
Next high tide : 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 - Feb 1926

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:569.71:0510.36:561.07:200.36:544:43Waning Gibbous1Mon
2Tue1:319.71:4210.07:331.17:550.56:524:45Waning Gibbous2Tue
3Wed2:089.72:229.78:121.18:330.76:514:46Waning Gibbous3Wed
4Thu2:489.73:079.48:561.19:150.96:504:47Third Quarter4Thu
5Fri3:339.73:579.29:461.110:041.16:494:49Third Quarter5Fri
6Sat4:239.84:559.010:421.010:581.26:484:50Third Quarter6Sat
7Sun5:2010.05:589.011:430.811:591.26:464:52Third Quarter7Sun
8Mon6:2110.37:039.212:470.46:454:53Waning Crescent8Mon
9Tue7:2310.88:059.71:020.91:49-0.26:444:54Waning Crescent9Tue
10Wed8:2311.49:0310.32:040.52:48-0.96:424:56Waning Crescent10Wed
11Thu9:2012.09:5710.83:02-0.13:43-1.56:414:57New Moon11Thu
12Fri10:1412.410:5011.33:58-0.74:36-1.96:404:59New Moon12Fri
13Sat11:0712.711:4111.74:52-1.15:27-2.16:385:00New Moon13Sat
14Sun12:0012.75:45-1.36:18-2.06:375:01Waxing Crescent14Sun
15Mon12:3111.812:5212.36:38-1.37:08-1.76:355:03Waxing Crescent15Mon
16Tue1:2311.71:4611.87:33-1.18:00-1.26:345:04Waxing Crescent16Tue
17Wed2:1511.52:4111.18:28-0.78:53-0.56:325:06First Quarter17Wed
18Thu3:0911.03:4010.39:26-0.39:490.26:315:07First Quarter18Thu
19Fri4:0610.64:429.610:270.210:480.96:295:08First Quarter19Fri
20Sat5:0610.25:479.211:310.511:501.36:285:10First Quarter20Sat
21Sun6:089.96:518.912:340.76:265:11Waxing Gibbous21Sun
22Mon7:099.87:508.912:511.51:340.76:245:12Waxing Gibbous22Mon
23Tue8:059.98:429.11:491.52:280.56:235:14Waxing Gibbous23Tue
24Wed8:5510.19:289.32:411.33:150.46:215:15Waxing Gibbous24Wed
25Thu9:3910.310:099.53:261.03:570.26:195:16Full Moon25Thu
26Fri10:1910.510:459.84:080.84:360.16:185:18Full Moon26Fri
27Sat10:5610.611:209.94:450.75:110.06:165:19Full Moon27Sat
28Sun11:3010.611:5310.05:210.65:440.16:145:20Full Moon28Sun
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 3:33 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