Tides Today & Tomorrow in Castine, ME

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Castine, ME.
Next low tide : 9:46 am (0.9 ft)
Next high tide : in 2h 51m at 3:40 am (10.1 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 - Aug 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue6:589.47:2011.012:450.412:561.15:218:00Waxing Gibbous1Tue
2Wed8:069.48:2511.31:510.12:021.15:227:59Waxing Gibbous2Wed
3Thu9:119.79:2811.62:56-0.23:080.85:247:58Waxing Gibbous3Thu
4Fri10:1210.110:2711.93:57-0.64:090.45:257:57Full Moon4Fri
5Sat11:0810.511:2312.14:54-0.95:070.15:267:55Full Moon5Sat
6Sun12:0010.95:47-1.16:02-0.15:277:54Full Moon6Sun
7Mon12:1612.112:5011.16:37-1.16:54-0.25:287:53Waning Gibbous7Mon
8Tue1:0711.91:3911.17:25-0.97:45-0.15:297:51Waning Gibbous8Tue
9Wed1:5711.52:2611.08:12-0.58:360.15:307:50Waning Gibbous9Wed
10Thu2:4710.93:1310.88:580.19:270.45:327:48Waning Gibbous10Thu
11Fri3:3710.24:0110.59:450.710:190.85:337:47Third Quarter11Fri
12Sat4:309.64:5110.110:341.311:131.25:347:45Third Quarter12Sat
13Sun5:259.05:449.811:251.85:357:44Third Quarter13Sun
14Mon6:238.66:409.612:101.412:212.25:367:42Third Quarter14Mon
15Tue7:238.47:369.51:081.51:182.45:377:41Waning Crescent15Tue
16Wed8:208.48:319.72:051.52:142.35:387:39Waning Crescent16Wed
17Thu9:138.69:229.92:591.33:062.15:407:38Waning Crescent17Thu
18Fri9:598.910:0710.23:471.03:531.85:417:36Waning Crescent18Fri
19Sat10:419.210:4810.54:300.74:351.55:427:35New Moon19Sat
20Sun11:199.611:2710.85:080.45:151.25:437:33New Moon20Sun
21Mon11:5510.05:450.25:530.95:447:31New Moon21Mon
22Tue12:0410.912:3010.36:190.06:310.65:457:30New Moon22Tue
23Wed12:4211.01:0610.76:540.07:100.35:477:28Waxing Crescent23Wed
24Thu1:2110.91:4310.97:310.07:520.25:487:26Waxing Crescent24Thu
25Fri2:0210.72:2411.18:100.18:370.15:497:25Waxing Crescent25Fri
26Sat2:4810.43:0911.18:530.49:260.15:507:23Waxing Crescent26Sat
27Sun3:3810.13:5911.09:410.710:220.35:517:21First Quarter27Sun
28Mon4:359.64:5610.910:351.011:240.45:527:19First Quarter28Mon
29Tue5:389.36:0010.711:381.35:547:18First Quarter29Tue
30Wed6:489.27:0910.712:320.512:471.45:557:16Waxing Gibbous30Wed
31Thu7:589.38:1811.01:410.31:571.25:567:14Waxing Gibbous31Thu
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 6:43 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 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