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 3h 32m at 9:46 am (0.9 ft)
Next high tide : 4:01 pm (10.4 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 - Feb 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed3:179.93:449.19:341.09:491.46:534:44First Quarter1Wed
2Thu4:069.64:408.610:281.310:401.96:524:45First Quarter2Thu
3Fri4:599.35:398.211:251.511:362.26:514:46First Quarter3Fri
4Sat5:569.26:398.112:251.66:504:48Waxing Gibbous4Sat
5Sun6:539.27:378.212:342.31:221.46:484:49Waxing Gibbous5Sun
6Mon7:479.48:288.41:302.22:151.16:474:51Waxing Gibbous6Mon
7Tue8:379.89:148.82:211.93:020.76:464:52Waxing Gibbous7Tue
8Wed9:2110.29:559.23:071.53:440.36:454:53Full Moon8Wed
9Thu10:0210.610:339.63:491.14:220.06:434:55Full Moon9Thu
10Fri10:4110.911:0910.04:280.74:59-0.36:424:56Full Moon10Fri
11Sat11:1911.111:4610.45:070.45:35-0.56:414:58Full Moon11Sat
12Sun11:5811.25:470.06:12-0.66:394:59Waning Gibbous12Sun
13Mon12:2310.812:4011.16:28-0.26:50-0.66:385:00Waning Gibbous13Mon
14Tue1:0311.01:2410.87:12-0.37:32-0.36:365:02Waning Gibbous14Tue
15Wed1:4711.12:1210.48:00-0.38:180.06:355:03Waning Gibbous15Wed
16Thu2:3411.03:069.98:53-0.19:090.56:335:05Third Quarter16Thu
17Fri3:2810.84:079.49:530.110:080.96:325:06Third Quarter17Fri
18Sat4:3010.55:169.011:000.311:161.36:305:07Third Quarter18Sat
19Sun5:3810.46:298.912:110.46:295:09Waning Crescent19Sun
20Mon6:5010.47:399.212:281.31:220.16:275:10Waning Crescent20Mon
21Tue7:5710.78:419.61:381.02:26-0.26:265:11Waning Crescent21Tue
22Wed8:5811.19:3610.12:410.63:22-0.66:245:13Waning Crescent22Wed
23Thu9:5211.410:2510.53:370.14:12-0.86:225:14New Moon23Thu
24Fri10:4111.511:1010.84:28-0.24:58-0.96:215:15New Moon24Fri
25Sat11:2711.411:5210.95:15-0.45:41-0.86:195:17New Moon25Sat
26Sun12:1011.15:59-0.46:21-0.46:175:18Waxing Crescent26Sun
27Mon12:3210.812:5210.76:42-0.27:000.06:165:19Waxing Crescent27Mon
28Tue1:1110.61:3410.17:240.17:390.66:145:21Waxing Crescent28Tue
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 12:53 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 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