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 2h 06m 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 - Mar 1926

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:0410.55:550.56:160.26:135:22Full Moon1Mon
2Tue12:2510.112:3910.46:290.56:480.36:115:23Waning Gibbous2Tue
3Wed12:5810.21:1510.27:040.57:220.46:095:24Waning Gibbous3Wed
4Thu1:3310.21:549.97:430.57:590.76:085:26Waning Gibbous4Thu
5Fri2:1210.22:379.68:250.58:410.96:065:27Third Quarter5Fri
6Sat2:5710.23:289.39:140.69:311.16:045:28Third Quarter6Sat
7Sun3:4910.14:269.110:100.610:281.36:025:30Third Quarter7Sun
8Mon4:4810.15:319.111:140.611:321.36:015:31Third Quarter8Mon
9Tue5:5410.36:399.312:210.35:595:32Waning Crescent9Tue
10Wed7:0110.77:459.812:411.01:28-0.25:575:33Waning Crescent10Wed
11Thu8:0511.28:4410.41:470.42:29-0.85:555:35Waning Crescent11Thu
12Fri9:0411.89:3911.12:48-0.23:25-1.35:535:36New Moon12Fri
13Sat10:0012.210:3111.63:44-0.94:17-1.75:525:37New Moon13Sat
14Sun10:5212.511:2012.04:38-1.45:07-1.95:505:39New Moon14Sun
15Mon11:4312.45:29-1.65:56-1.75:485:40New Moon15Mon
16Tue12:0912.112:3412.16:20-1.66:44-1.35:465:41Waxing Crescent16Tue
17Wed12:5712.01:2511.57:12-1.47:34-0.75:445:42Waxing Crescent17Wed
18Thu1:4611.62:1810.88:04-0.98:240.05:425:44Waxing Crescent18Thu
19Fri2:3711.03:1310.18:58-0.39:180.75:415:45First Quarter19Fri
20Sat3:3210.54:129.49:550.310:151.35:395:46First Quarter20Sat
21Sun4:309.95:149.010:560.811:161.75:375:47First Quarter21Sun
22Mon5:329.66:178.711:581.05:355:49First Quarter22Mon
23Tue6:349.47:168.812:181.912:581.15:335:50Waxing Gibbous23Tue
24Wed7:329.58:099.01:171.81:531.05:315:51Waxing Gibbous24Wed
25Thu8:249.78:559.32:101.52:410.85:295:52Waxing Gibbous25Thu
26Fri9:0910.09:369.62:571.23:240.55:285:54Waxing Gibbous26Fri
27Sat9:5010.210:1310.03:390.84:020.45:265:55Full Moon27Sat
28Sun10:2810.410:4710.24:170.54:380.35:245:56Full Moon28Sun
29Mon11:0310.511:2010.44:530.35:110.25:225:57Full Moon29Mon
30Tue11:3810.511:5210.65:280.25:430.35:205:58Full Moon30Tue
31Wed12:1310.46:020.06:170.45:186:00Waning Gibbous31Wed
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