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 10m 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 - Dec 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue11:2111.311:5410.25:110.45:42-0.56:503:57Full Moon1Tue
2Wed12:0111.15:520.86:23-0.26:523:57Waning Gibbous2Wed
3Thu12:3510.012:4110.86:321.17:040.16:533:56Waning Gibbous3Thu
4Fri1:179.71:2210.47:131.47:450.46:543:56Waning Gibbous4Fri
5Sat1:599.42:0510.07:561.78:280.86:553:56Waning Gibbous5Sat
6Sun2:439.22:519.78:421.99:131.06:563:56Third Quarter6Sun
7Mon3:309.13:409.49:312.110:011.26:573:56Third Quarter7Mon
8Tue4:209.04:339.210:232.110:511.36:583:55Third Quarter8Tue
9Wed5:119.15:289.111:181.911:411.36:593:55Third Quarter9Wed
10Thu6:029.46:239.212:131.67:003:55Waning Crescent10Thu
11Fri6:529.87:179.412:321.11:061.17:013:55Waning Crescent11Fri
12Sat7:4010.38:089.81:210.91:560.57:013:56Waning Crescent12Sat
13Sun8:2610.98:5710.22:090.62:45-0.27:023:56Waning Crescent13Sun
14Mon9:1211.59:4510.52:560.33:32-0.87:033:56New Moon14Mon
15Tue9:5812.010:3310.83:430.04:20-1.37:043:56New Moon15Tue
16Wed10:4512.311:2211.04:31-0.25:08-1.67:043:56New Moon16Wed
17Thu11:3512.55:20-0.45:58-1.77:053:57Waxing Crescent17Thu
18Fri12:1311.112:2612.46:12-0.36:50-1.67:063:57Waxing Crescent18Fri
19Sat1:0611.01:2112.17:07-0.27:45-1.37:063:57Waxing Crescent19Sat
20Sun2:0210.92:1911.78:050.08:42-1.07:073:58Waxing Crescent20Sun
21Mon3:0010.73:2011.19:070.29:42-0.57:083:58First Quarter21Mon
22Tue4:0210.64:2510.610:120.410:44-0.27:083:59First Quarter22Tue
23Wed5:0510.55:3310.211:190.411:460.17:093:59First Quarter23Wed
24Thu6:0810.66:3810.012:250.37:094:00Waxing Gibbous24Thu
25Fri7:0810.77:409.912:470.31:270.17:094:00Waxing Gibbous25Fri
26Sat8:0310.98:3610.01:440.42:23-0.27:104:01Waxing Gibbous26Sat
27Sun8:5311.09:2710.02:370.53:14-0.47:104:02Waxing Gibbous27Sun
28Mon9:3911.110:1310.03:260.54:01-0.57:104:02Full Moon28Mon
29Tue10:2111.110:5510.04:100.64:43-0.57:104:03Full Moon29Tue
30Wed11:0111.011:349.94:510.75:23-0.37:114:04Full Moon30Wed
31Thu11:4010.95:310.96:01-0.27:114:05Full Moon31Thu
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