Tides Today & Tomorrow in Islesboro, ME

TIDE TIMES for Tuesday, July 21, 2026
The tide is currently falling in Islesboro, ME.
Next low tide (tomorrow) : in 42m at 12:00 am (1.0 ft)
Next high tide (tomorrow) : 6:12 am (9.0 ft)
Sunset today : 8:12 pm
Sunrise tomorrow : 5:11 am
Moon phase : First Quarter (52% illuminated)
Tide Station Location : Station #8414888
Common Questions About Tides

Islesboro, ME Tides - Dec 1983

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu8:0411.38:3510.61:44-0.12:22-0.56:503:58Waning Crescent1Thu
2Fri8:5611.69:2910.62:38-0.13:15-0.86:523:58New Moon2Fri
3Sat9:4411.810:1910.63:28-0.14:05-1.06:533:57New Moon3Sat
4Sun10:3011.811:0610.54:150.14:52-1.16:543:57New Moon4Sun
5Mon11:1411.611:5210.25:010.35:38-0.96:553:57New Moon5Mon
6Tue11:5711.35:450.66:23-0.66:563:57Waxing Crescent6Tue
7Wed12:379.912:3910.86:291.07:07-0.26:573:56Waxing Crescent7Wed
8Thu1:229.51:2210.37:131.47:500.36:583:56Waxing Crescent8Thu
9Fri2:079.12:059.97:571.88:340.76:593:56Waxing Crescent9Fri
10Sat2:538.92:509.48:432.19:201.17:003:56First Quarter10Sat
11Sun3:418.73:399.19:332.310:081.47:013:56First Quarter11Sun
12Mon4:308.64:338.810:282.410:571.67:013:56First Quarter12Mon
13Tue5:198.75:288.711:242.211:451.77:023:56First Quarter13Tue
14Wed6:069.06:228.712:181.97:033:57Waxing Gibbous14Wed
15Thu6:509.47:148.912:321.61:091.57:043:57Waxing Gibbous15Thu
16Fri7:349.88:049.11:181.51:571.07:043:57Waxing Gibbous16Fri
17Sat8:1710.38:529.42:031.22:430.47:053:57Waxing Gibbous17Sat
18Sun9:0010.99:389.82:471.03:28-0.27:063:58Full Moon18Sun
19Mon9:4411.410:2310.13:320.74:14-0.77:063:58Full Moon19Mon
20Tue10:2911.811:1010.34:180.45:00-1.07:073:58Full Moon20Tue
21Wed11:1612.011:5910.55:060.25:49-1.27:083:59Full Moon21Wed
22Thu12:0612.05:560.16:39-1.37:083:59Waning Gibbous22Thu
23Fri12:5010.512:5911.96:490.17:31-1.27:094:00Waning Gibbous23Fri
24Sat1:4410.51:5611.67:450.28:25-0.97:094:00Waning Gibbous24Sat
25Sun2:4210.52:5611.18:450.49:22-0.67:094:01Third Quarter25Sun
26Mon3:4310.54:0210.79:500.510:23-0.27:104:02Third Quarter26Mon
27Tue4:4610.65:1110.310:580.411:250.17:104:02Third Quarter27Tue
28Wed5:4810.76:1810.012:050.37:104:03Waning Crescent28Wed
29Thu6:4710.97:219.912:250.31:090.07:114:04Waning Crescent29Thu
30Fri7:4411.18:219.91:240.52:07-0.27:114:05Waning Crescent30Fri
31Sat8:3811.29:139.82:190.53:01-0.47:114:06Waning Crescent31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8414888)

Common Questions About Islesboro, ME Tides

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What time does the tide turn (slack tide) in Islesboro, ME today?

Slack tide in Islesboro, ME is approximately 3:06 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 Islesboro, ME?

Islesboro, ME is currently in a neap phase. Tonight's moon is 52% 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 near their weekly minimum.

What datum are Islesboro, 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 Islesboro, ME?

Tide predictions for Islesboro, 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 Islesboro, ME?

Tide data for Islesboro, ME is sourced from NOAA Station #8414888. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8414888.

What is the moon phase in Islesboro, ME tonight?

Tonight the moon over Islesboro, ME is First Quarter (52% illuminated). This places Islesboro, ME in a neap tide cycle, so tidal ranges are near their weekly minimum 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