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Marine Weather and Tide Forecast for Southwest Harbor, ME

April 21, 2026 1:35 PM EDT (17:35 UTC)
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Sunrise 5:39 AM   Sunset 7:27 PM
Moonrise 8:17 AM   Moonset 12:05 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
   
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NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
ANZ052 Intra Coastal Waters From Schoodic Point, Me To Stonington, Me- 1213 Pm Edt Tue Apr 21 2026

Today - NE winds 5 to 10 kt, becoming S this afternoon. Seas 1 to 2 ft. Wave detail: W 1 foot at 3 seconds and ne 1 foot at 3 seconds.

Tonight - SW winds 5 to 10 kt. Seas 1 foot or less. Wave detail: sw 1 foot at 3 seconds and E 1 foot at 4 seconds.

Wed - S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 to 2 ft. Wave detail: S 2 ft at 4 seconds and E 1 foot at 4 seconds.

Wed night - SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 1 to 2 ft. Wave detail: S 2 ft at 5 seconds. A chance of showers after midnight.

Thu - W winds 5 to 10 kt. Seas 1 to 2 ft. Wave detail: S 2 ft at 6 seconds. A chance of showers.

Thu night - NW winds 5 to 10 kt. Seas 1 to 2 ft in the evening, then 1 foot or less. Wave detail: nw 1 foot at 2 seconds and S 1 foot at 5 seconds, becoming nw 1 foot at 2 seconds and S 1 foot at 6 seconds.

Fri - NW winds 5 to 10 kt. Seas 1 to 2 ft.

Fri night - N winds 5 to 10 kt. Seas 1 to 2 ft.

Sat - N winds 5 to 10 kt, becoming W in the afternoon. Seas 1 foot or less.

Sat night - NW winds around 5 kt. Seas 1 foot or less.
ANZ005 1213 Pm Edt Tue Apr 21 2026

Synopsis for eastport me to stonington me out 25 nm - Canadian high pressure builds in through Tuesday, then slowly exits to the east Tuesday night. A weak storm system passes well to the south Wednesday. Another weak storm system passes to the north Wednesday night, then exits in to the maritimes Thursday. High pressure then builds down from eastern canada into Saturday.
7 Day Forecast for Marine Location Near Southwest Harbor, ME
   
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Tide / Current for Bass Harbor, Mount Desert Island, Maine
  
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Bass Harbor
Click for Map
Tue -- 12:05 AM EDT     Moonset
Tue -- 01:58 AM EDT     11.71 feet High Tide
Tue -- 05:39 AM EDT     Sunrise
Tue -- 07:58 AM EDT     -1.05 feet Low Tide
Tue -- 08:17 AM EDT     Moonrise
Tue -- 02:41 PM EDT     10.20 feet High Tide
Tue -- 07:25 PM EDT     Sunset
Tue -- 08:13 PM EDT     0.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION		        
  Sorry, Bass Harbor, Mount Desert Island, Maine does not exist in database. Press Edit above and select a valid nearby location.

Bass Harbor, Mount Desert Island, Maine, Tide feet
12
am
9.4
1
am
11.1
2
am
11.7
3
am
10.8
4
am
8.4
5
am
5.2
6
am
2
7
am
-0.3
8
am
-1
9
am
-0.4
10
am
1.3
11
am
3.8
12
pm
6.5
1
pm
8.7
2
pm
9.9
3
pm
10.1
4
pm
8.9
5
pm
6.5
6
pm
3.8
7
pm
1.6
8
pm
0.5
9
pm
0.8
10
pm
2.2
11
pm
4.4
Tide / Current for Casco Passage, east end, Blue Hill Bay, Maine Current
  
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Casco Passage
Click for Map Flood direction 86 true
Ebb direction 284 true

Tue -- 12:05 AM EDT     Moonset
Tue -- 01:40 AM EDT     -0.00 knots Slack
Tue -- 04:30 AM EDT     -0.79 knots Max Ebb
Tue -- 05:40 AM EDT     Sunrise
Tue -- 07:32 AM EDT     0.00 knots Slack
Tue -- 08:18 AM EDT     Moonrise
Tue -- 10:52 AM EDT     0.78 knots Max Flood
Tue -- 02:36 PM EDT     -0.00 knots Slack
Tue -- 04:59 PM EDT     -0.68 knots Max Ebb
Tue -- 07:25 PM EDT     Sunset
Tue -- 07:44 PM EDT     0.00 knots Slack
Tue -- 11:07 PM EDT     0.76 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION		        
  Sorry, Casco Passage, east end, Blue Hill Bay, Maine Current does not exist in database. Press Edit above and select a valid nearby location.

Casco Passage, east end, Blue Hill Bay, Maine Current, knots
12
am
0.5
1
am
0.2
2
am
-0.1
3
am
-0.4
4
am
-0.7
5
am
-0.7
6
am
-0.5
7
am
-0.2
8
am
0.2
9
am
0.5
10
am
0.7
11
am
0.8
12
pm
0.7
1
pm
0.4
2
pm
0.2
3
pm
-0.1
4
pm
-0.5
5
pm
-0.7
6
pm
-0.5
7
pm
-0.2
8
pm
0.1
9
pm
0.4
10
pm
0.6
11
pm
0.8
Area Discussion for Caribou, ME
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FXUS61 KCAR 210620 AFDCAR

Area Forecast Discussion National Weather Service Caribou ME 220 AM EDT Tue Apr 21 2026

WHAT HAS CHANGED
No significant changes from last forecast.

KEY MESSAGES
1) Below normal temperatures expected through the end of the week before warming for the weekend.

DISCUSSION
KEY MESSAGE 1...Below normal temperatures expected through the end of the week before warming for the weekend.

KEY MESSAGE 1 DESCRIPTION...
Below normal temperatures continue through Wednesday. High temps will be hard- pressed to climb into the 50s Thursday and Friday with temps likely to remain in the 40s with upper low remaining over the Maritimes. Upper low will begin to head east into the North Atlantic over the weekend as upr ridge builds closer to the area. As a result temps will begin to moderate through the weekend with highs reaching into the 50s this weekend, possibly into the 60s early next week. Most of the storm system will pass to our south thru the end of the period.

AVIATION /06Z TUESDAY THROUGH SATURDAY/
VFR conditions expected through Wednesday. W wind 5 to 10 kt today, becoming light S this afternoon. Light and variable wind tonight, then S wind 5 to 10 kt on Wednesday.

Wednesday night-Thursday.. MVFR or lower in showers. Light S becoming NW and increasing to 5-10kts Thursday morning.

Thursday night...VFR/MVFR possible north, VFR Downeast. NW 5-15kts.

Friday-Saturday...VFR. NNW 5-15kts.

MARINE
High pressure will keep winds and seas below SCA criteria through the weekend.

CAR WATCHES/WARNINGS/ADVISORIES
ME...None.
MARINE...None.

Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
ATGM1 - 8413320 - Bar Harbor, ME 13 mi47 minSSE 7G9.9 41°F
MDRM1 - Mt Desert Rock, ME 22 mi35 minENE 2.9G5.1 35°F 30.35
MISM1 - Matinicus Rock, ME 41 mi35 minSSE 5.1G7 35°F 30.3719°F


Wind History for Bar Harbor, ME
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KBHB HANCOCK COUNTYBAR HARBOR,ME 15 sm39 minvar 0310 smOvercast39°F16°F38%30.32

Link to 1 hour of 5 minute data for KBHB
   
Terminal Aerodrome Forecast (TAF) for KBHB

Wind History Graph: BHB
(wind in knots)
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Weather Map
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Full Color Weather Map

wmap_A
GEOS Local Image of north east  
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Ground Weather Radar Station
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Portland, ME,



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