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 4h 03m 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 - Aug 1925

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat8:2710.08:4711.62:12-0.12:270.55:218:01Waxing Gibbous1Sat
2Sun9:2810.49:4612.13:13-0.63:270.25:227:59Waxing Gibbous2Sun
3Mon10:2610.810:4312.54:11-1.14:25-0.25:237:58Full Moon3Mon
4Tue11:2111.211:3812.75:07-1.55:22-0.55:257:57Full Moon4Tue
5Wed12:1511.56:01-1.86:18-0.75:267:55Full Moon5Wed
6Thu12:3212.71:0811.76:54-1.87:13-0.85:277:54Waning Gibbous6Thu
7Fri1:2612.52:0111.77:46-1.58:08-0.65:287:53Waning Gibbous7Fri
8Sat2:2112.12:5411.58:38-1.19:04-0.45:297:51Waning Gibbous8Sat
9Sun3:1611.53:4811.29:31-0.610:010.05:307:50Third Quarter9Sun
10Mon4:1310.84:4310.910:250.011:000.35:317:48Third Quarter10Mon
11Tue5:1210.25:3910.611:210.611:590.65:337:47Third Quarter11Tue
12Wed6:139.66:3710.312:181.15:347:46Third Quarter12Wed
13Thu7:149.37:3410.212:590.81:161.55:357:44Waning Crescent13Thu
14Fri8:129.18:2910.11:580.92:121.65:367:43Waning Crescent14Fri
15Sat9:079.29:1910.22:520.83:041.65:377:41Waning Crescent15Sat
16Sun9:559.310:0610.43:420.73:521.45:387:39Waning Crescent16Sun
17Mon10:399.510:4810.64:270.54:361.35:407:38New Moon17Mon
18Tue11:199.711:2710.75:080.45:161.15:417:36New Moon18Tue
19Wed11:569.95:450.35:541.05:427:35New Moon19Wed
20Thu12:0410.712:3110.06:210.26:300.95:437:33New Moon20Thu
21Fri12:4010.81:0510.26:550.27:060.95:447:31Waxing Crescent21Fri
22Sat1:1510.71:4010.37:290.37:430.85:457:30Waxing Crescent22Sat
23Sun1:5210.62:1610.48:040.38:220.75:467:28Waxing Crescent23Sun
24Mon2:3110.42:5510.58:410.49:040.75:487:26Waxing Crescent24Mon
25Tue3:1510.23:3810.69:220.69:520.65:497:25First Quarter25Tue
26Wed4:0310.04:2710.610:090.710:450.65:507:23First Quarter26Wed
27Thu4:589.75:2210.711:020.911:440.55:517:21First Quarter27Thu
28Fri5:599.66:2310.812:011.05:527:19First Quarter28Fri
29Sat7:049.67:2711.012:480.31:060.95:537:18Waxing Gibbous29Sat
30Sun8:109.98:3111.41:54-0.12:110.65:557:16Waxing Gibbous30Sun
31Mon9:1210.49:3211.92:57-0.53:140.15:567:14Waxing Gibbous31Mon
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