Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Castine, ME.
Next low tide : 12:24 pm (2.3 ft)
Next high tide : in 1h 46m at 6:27 am (8.5 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 - Oct 1926

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri6:569.27:139.912:380.912:581.75:325:17Waning Crescent1Fri
2Sat7:509.38:0610.01:340.91:521.55:335:15Waning Crescent2Sat
3Sun8:389.68:5210.22:230.72:401.25:345:14Waning Crescent3Sun
4Mon9:199.99:3410.43:070.63:230.95:355:12Waning Crescent4Mon
5Tue9:5710.110:1310.53:460.54:020.65:375:10New Moon5Tue
6Wed10:3210.410:4910.54:220.44:390.55:385:08New Moon6Wed
7Thu11:0510.511:2310.44:550.55:140.45:395:06New Moon7Thu
8Fri11:3710.611:5810.35:280.65:480.35:405:04New Moon8Fri
9Sat12:1010.76:000.76:230.35:425:03Waxing Crescent9Sat
10Sun12:3410.112:4510.66:350.97:010.45:435:01Waxing Crescent10Sun
11Mon1:139.91:2410.67:121.17:430.55:444:59Waxing Crescent11Mon
12Tue1:569.72:0810.57:551.38:300.55:454:57Waxing Crescent12Tue
13Wed2:459.42:5910.48:441.59:240.65:474:56First Quarter13Wed
14Thu3:419.33:5810.39:401.610:250.65:484:54First Quarter14Thu
15Fri4:439.35:0310.310:441.511:300.55:494:52First Quarter15Fri
16Sat5:499.56:1010.611:521.25:504:50Waxing Gibbous16Sat
17Sun6:5310.07:1511.012:340.112:590.75:524:49Waxing Gibbous17Sun
18Mon7:5310.78:1611.41:35-0.42:00-0.15:534:47Waxing Gibbous18Mon
19Tue8:4711.49:1211.82:31-0.82:58-0.85:544:45Full Moon19Tue
20Wed9:3912.010:0512.03:24-1.23:51-1.35:554:44Full Moon20Wed
21Thu10:2812.410:5712.04:14-1.34:43-1.75:574:42Full Moon21Thu
22Fri11:1612.511:4711.85:03-1.15:34-1.75:584:41Full Moon22Fri
23Sat12:0412.35:52-0.86:24-1.55:594:39Waning Gibbous23Sat
24Sun12:3811.412:5312.06:41-0.37:16-1.06:014:37Waning Gibbous24Sun
25Mon1:3010.81:4411.47:320.48:09-0.46:024:36Waning Gibbous25Mon
26Tue2:2410.22:3810.88:261.09:040.26:034:34Third Quarter26Tue
27Wed3:219.73:3510.29:221.510:020.76:054:33Third Quarter27Wed
28Thu4:219.34:359.810:221.911:011.06:064:31Third Quarter28Thu
29Fri5:219.15:379.511:242.06:074:30Third Quarter29Fri
30Sat6:199.16:369.512:001.212:231.96:094:28Waning Crescent30Sat
31Sun7:129.37:299.612:541.21:171.66:104:27Waning Crescent31Sun
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 9:25 am — 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