Tides Today & Tomorrow in Southwest Harbor, ME

TIDE TIMES for Monday, August 17, 2026
The tide is currently rising in Southwest Harbor, ME.

Next low tide : 8:51 pm (0.4 ft)
Next high tide : in 5h 21m at 2:58 pm (10.9 ft)
Sunset today : 7:35 pm
Sunrise tomorrow : 5:39 am
Moon phase : Waxing Crescent (27% illuminated)
Tide Station Location : Station #8413564
Common Questions About Tides

Featured Local Businesses

Hamilton Marine - Southwest Harbor

Clark Point Gallery

A red hull lobster yacht cruising in calm water

John Williams Boat Company

Bowden Marine

Billings Diesel & Marine

Southwest Harbor, ME Tides - Oct 1962

< Sep 1962

Print this Tide Chart

Nov 1962 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Mon	12:50	10.4	1:03	10.6	6:31	0.7	6:52	0.5	6:30	6:15		1	Mon
2	Tue	1:25	10.1	1:37	10.5	7:04	1.0	7:28	0.7	6:31	6:13		2	Tue
3	Wed	2:02	9.9	2:14	10.4	7:40	1.2	8:07	0.8	6:33	6:11		3	Wed
4	Thu	2:42	9.6	2:54	10.2	8:19	1.4	8:50	0.9	6:34	6:09		4	Thu
5	Fri	3:26	9.4	3:40	10.1	9:03	1.6	9:39	1.0	6:35	6:08		5	Fri
6	Sat	4:17	9.2	4:33	10.1	9:54	1.7	10:34	0.9	6:36	6:06		6	Sat
7	Sun	5:14	9.2	5:32	10.1	10:52	1.7	11:35	0.8	6:37	6:04		7	Sun
8	Mon	6:16	9.3	6:36	10.4	11:55	1.4			6:39	6:02		8	Mon
9	Tue	7:18	9.8	7:39	10.8	12:37	0.5	12:59	1.0	6:40	6:00		9	Tue
10	Wed	8:17	10.4	8:39	11.4	1:37	0.0	2:00	0.3	6:41	5:59		10	Wed
11	Thu	9:12	11.2	9:35	11.9	2:33	-0.6	2:57	-0.4	6:42	5:57		11	Thu
12	Fri	10:04	11.9	10:29	12.3	3:26	-1.0	3:52	-1.1	6:44	5:55		12	Fri
13	Sat	10:55	12.5	11:22	12.5	4:17	-1.4	4:44	-1.6	6:45	5:53		13	Sat
14	Sun	11:44	12.8			5:07	-1.5	5:37	-1.8	6:46	5:52		14	Sun
15	Mon	12:14	12.4	12:34	12.9	5:57	-1.3	6:29	-1.8	6:47	5:50		15	Mon
16	Tue	1:06	12.1	1:25	12.7	6:49	-0.9	7:22	-1.5	6:49	5:48		16	Tue
17	Wed	2:00	11.6	2:18	12.2	7:42	-0.4	8:18	-1.0	6:50	5:47		17	Wed
18	Thu	2:57	11.0	3:14	11.6	8:37	0.2	9:16	-0.5	6:51	5:45		18	Thu
19	Fri	3:56	10.4	4:14	11.0	9:37	0.8	10:17	0.0	6:52	5:43		19	Fri
20	Sat	4:59	9.9	5:17	10.5	10:40	1.2	11:20	0.5	6:54	5:42		20	Sat
21	Sun	6:03	9.6	6:22	10.1	11:44	1.4			6:55	5:40		21	Sun
22	Mon	7:05	9.6	7:24	10.0	12:22	0.7	12:46	1.4	6:56	5:38		22	Mon
23	Tue	8:01	9.7	8:20	10.0	1:20	0.7	1:43	1.2	6:58	5:37		23	Tue
24	Wed	8:51	9.9	9:10	10.2	2:12	0.7	2:35	1.0	6:59	5:35		24	Wed
25	Thu	9:35	10.2	9:54	10.3	2:58	0.6	3:20	0.7	7:00	5:34		25	Thu
26	Fri	10:15	10.4	10:35	10.3	3:39	0.5	4:01	0.4	7:02	5:32		26	Fri
27	Sat	10:51	10.6	11:12	10.4	4:17	0.5	4:39	0.3	7:03	5:31		27	Sat
28	Sun	10:25	10.8	10:48	10.3	3:52	0.6	4:15	0.2	6:04	4:29		28	Sun
29	Mon	10:58	10.8	11:23	10.2	4:26	0.7	4:50	0.2	6:05	4:28		29	Mon
30	Tue	11:31	10.8	11:59	10.0	4:59	0.9	5:25	0.2	6:07	4:26		30	Tue
31	Wed			12:06	10.8	5:33	1.0	6:01	0.3	6:08	4:25		31	Wed
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (8413564)

www.USHarbors.com

The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
Any commercial use, modification, redistribution, or repackaging without written permission is strictly prohibited.

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

Slack tide in Southwest Harbor, ME is approximately 5:54 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 Southwest Harbor, ME?

Southwest Harbor, ME is currently in a transitional phase. Tonight's moon is 27% 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 Southwest Harbor, 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 Southwest Harbor, ME?

Tide predictions for Southwest Harbor, 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 Southwest Harbor, ME?

Tide data for Southwest Harbor, ME is sourced from NOAA Station #8413564. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8413564.

What is the moon phase in Southwest Harbor, ME tonight?

Tonight the moon over Southwest Harbor, ME is Waxing Crescent (27% illuminated). This places Southwest Harbor, 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

In The Zone: The Sabre 51 Salon Express

By US Harbors When Sabre Yachts completed construction of hull number 200 of its 48 Salon Express model, more than half the crew who built it had also worked on hull number one. The average tenure on that line was 12 years, and they produced a yacht that proved to… Learn More

Coastal News Updates See All

Prairie Creek project partners gather at the restoration site before construction begins. Credit: Michael Weir/CalTrout

Restoring California’s Prairie Creek Supports Salmon Recovery and Local Community

By fisheries.noaa.gov, fisheries.noaa.gov. For more than a decade, NOAA Fisheries and a broad coalition of partners worked… More

Coastal News Environment

A researcher in a U.S. Coast Guard helicopter first spotted the entangled humpback anchored to the bottom about 20 miles off the Oregon Coast. The whale’s white pectoral flipper extends underwater to the lower left, while white baleen outlines its open lower jaw at bottom right. The entanglement left the whale’s mouth stretched permanently open, making it unable to feed. Photo collected in partnership with Oregon Coast Aquarium, Oregon State University Marine Mammal Institute and Cascadia Research Collective.

Fishing Vessel Joins Trained Team to Free Injured Humpback Whale 20 Miles off Oregon Coast

By fisheries.noaa.gov, fisheries.noaa.gov. An Oregon team joined by experts from Washington and a local fisherman… More

Coastal News Ocean Awareness

NOAA's GOES West satellite captured this image of three tropical cyclones — Hurricanes Fausto and Genevieve and Typhoon Dolphin — swirling simultaneously in the Pacific Ocean. The image was taken on Tuesday, July 27, at 3:30 PM PDT/ 22:30 UTC. None of the three tropical cyclones made landfall in the United States. Fausto contributed to high surf conditions in Hawaii, and Genevieve also brought high surf to southern California. Typhoon Dolphin continued its track west toward Asia. (Image credit: NOAA Satellites)

Pacific Hurricanes Fausto and Genevieve actually had origins near Africa

By noaa.gov, noaa.gov. It may be surprising, but two of the hurricanes that swirled in… More

Extreme Weather Hurricanes Weather & Tides

Pacific capelin with unknown maturity. Scientists make microscopic observations to determine if capelin spawn only once or if they are capable of spawning over multiple years. Credit: NOAA Fisheries

NOAA Scientists Discover Repeat Spawning in Pacific Capelin

By fisheries.noaa.gov, fisheries.noaa.gov. For certain fish species, like Pacific salmon, reproduction is a once-in-a-lifetime event, known… More

Ocean Awareness Ocean Science

Enforcement officer inventories shark fins. Credit: NOAA Fisheries

NOAA Fisheries Enforcement Officers Deploy for High Seas Patrols Combatting Illegal, Unreported, and Unregulated Fishing

By fisheries.noaa.gov, fisheries.noaa.gov. Enforcement officers from NOAA Fisheries’ Office of Law Enforcement have successfully wrapped up deployments… More

Fishing