Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Castine, ME.
Next low tide (tomorrow) : 1:11 am (1.6 ft)
Next high tide : in 1h 50m at 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 - May 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri5:389.26:218.812:011.45:267:38First Quarter1Fri
2Sat6:359.27:159.012:232.212:551.45:247:39First Quarter2Sat
3Sun7:319.38:069.31:192.01:471.25:237:40Waxing Gibbous3Sun
4Mon8:249.68:539.82:131.52:360.95:217:42Waxing Gibbous4Mon
5Tue9:1410.09:3710.43:021.03:220.65:207:43Waxing Gibbous5Tue
6Wed10:0110.410:2011.03:490.34:060.35:197:44Waxing Gibbous6Wed
7Thu10:4610.711:0211.64:34-0.34:490.05:177:45Full Moon7Thu
8Fri11:3211.011:4612.05:18-0.85:33-0.25:167:46Full Moon8Fri
9Sat12:1811.26:04-1.26:18-0.35:157:47Full Moon9Sat
10Sun12:3112.21:0611.26:52-1.47:06-0.25:137:49Waning Gibbous10Sun
11Mon1:1912.31:5711.17:42-1.47:570.05:127:50Waning Gibbous11Mon
12Tue2:1112.12:5210.88:35-1.28:530.35:117:51Waning Gibbous12Tue
13Wed3:0611.83:5110.69:32-0.99:530.65:107:52Third Quarter13Wed
14Thu4:0711.34:5310.410:33-0.510:580.85:097:53Third Quarter14Thu
15Fri5:1210.95:5810.311:37-0.25:077:54Third Quarter15Fri
16Sat6:2010.67:0310.412:060.812:410.05:067:55Third Quarter16Sat
17Sun7:2710.58:0410.61:140.71:440.15:057:57Waning Crescent17Sun
18Mon8:3010.59:0010.92:170.42:420.15:047:58Waning Crescent18Mon
19Tue9:2710.59:5111.13:150.03:350.15:037:59Waning Crescent19Tue
20Wed10:1910.610:3711.34:07-0.34:230.25:028:00Waning Crescent20Wed
21Thu11:0710.511:2011.34:55-0.45:080.35:018:01New Moon21Thu
22Fri11:5110.45:39-0.55:500.65:008:02New Moon22Fri
23Sat12:0011.212:3210.36:20-0.46:300.95:008:03New Moon23Sat
24Sun12:3911.11:1310.17:00-0.27:091.24:598:04New Moon24Sun
25Mon1:1710.81:529.87:390.17:481.44:588:05Waxing Crescent25Mon
26Tue1:5610.62:339.68:190.48:291.74:578:06Waxing Crescent26Tue
27Wed2:3610.33:159.48:590.69:111.94:568:07Waxing Crescent27Wed
28Thu3:1910.03:599.39:420.99:562.14:568:08Waxing Crescent28Thu
29Fri4:059.74:459.210:271.110:452.14:558:09First Quarter29Fri
30Sat4:549.55:349.211:141.211:372.04:548:10First Quarter30Sat
31Sun5:479.46:259.412:041.24:548:10First Quarter31Sun
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 9:56 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