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Marine Weather and Tide Forecast for Winterport, ME


August 17, 2026 12:58 PM EDT (16:58 UTC)
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Sunrise 5:39 AM   Sunset 7:38 PM
Moonrise 11:23 AM   Moonset 9:33 PM 
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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.
ANZ151 Penobscot Bay- 802 Am Edt Mon Aug 17 2026

Today - S winds 5 to 10 kt with gusts up to 20 kt, increasing to 10 to 15 kt with gusts up to 20 kt late this morning and afternoon. Seas 2 to 3 ft. Wave detail: S 3 ft at 5 seconds. Showers likely, mainly this morning. Patchy fog this afternoon. Vsby 1 to 3 nm this morning.

Tonight - SE winds 5 to 10 kt, becoming E after midnight. Seas 2 to 3 ft. Wave detail: S 2 ft at 5 seconds. A chance of showers. Patchy fog. Vsby 1 nm or less.

Tue - NE winds around 5 kt. Seas around 2 ft. Wave detail: S 2 ft at 5 seconds. A chance of showers in the morning. Patchy dense fog in the morning with vsby 1 nm or less.

Tue night - N winds around 5 kt. Seas 2 to 4 ft. Wave detail: S 3 ft at 8 seconds.

Wed - W winds around 5 kt, becoming sw in the afternoon. Seas 2 to 4 ft. Wave detail: S 3 ft at 8 seconds.

Wed night - SW winds 5 to 10 kt, becoming W after midnight. Seas 2 to 3 ft. Wave detail: S 2 ft at 6 seconds.

Thu - NW winds around 5 kt, becoming sw in the afternoon. Seas around 2 ft.

Thu night - W winds around 5 kt, becoming nw after midnight. Seas around 2 ft.

Fri - N winds around 5 kt, becoming S in the afternoon. Seas around 2 ft.

Fri night - SW winds around 5 kt, becoming nw after midnight. Seas 1 foot or less.
ANZ100 802 Am Edt Mon Aug 17 2026

Synopsis for stonington me to merrimack river ma out to 60 nm - A passing system this morning will bring an increase in southerly winds and a few gusts to 25 knots outside of the bays. Seas will build in response, but are forecast to remain below 5 feet. High pressure slides south into midweek, with a cold front approaching the waters Wednesday evening.

7 Day Forecast for Marine Location Near Winterport, ME
   
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Tide / Current for Winterport, Penobscot River, Maine
  
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Winterport
Click for Map
Mon -- 02:33 AM EDT     12.58 feet High Tide
Mon -- 05:40 AM EDT     Sunrise
Mon -- 09:00 AM EDT     0.22 feet Low Tide
Mon -- 11:23 AM EDT     Moonrise
Mon -- 02:56 PM EDT     12.72 feet High Tide
Mon -- 07:37 PM EDT     Sunset
Mon -- 09:31 PM EDT     0.37 feet Low Tide
Mon -- 09:33 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Winterport, Penobscot River, Maine does not exist in database. Press Edit above and select a valid nearby location.

Winterport, Penobscot River, Maine, Tide feet
12
am
7.7
1
am
10.7
2
am
12.3
3
am
12.4
4
am
11.2
5
am
8.8
6
am
5.7
7
am
2.9
8
am
0.9
9
am
0.2
10
am
1
11
am
3.4
12
pm
6.7
1
pm
9.9
2
pm
12
3
pm
12.7
4
pm
12
5
pm
10
6
pm
7.2
7
pm
4.2
8
pm
1.8
9
pm
0.5
10
pm
0.5
11
pm
2.1

Tide / Current for Winterport, Penobscot River (depth 7 ft), Maine Current
  
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Winterport
Click for Map Flood direction 33 true
Ebb direction 212 true

Mon -- 12:34 AM EDT     1.82 knots Max Flood
Mon -- 02:57 AM EDT     -0.00 knots Slack
Mon -- 05:40 AM EDT     Sunrise
Mon -- 06:56 AM EDT     -2.24 knots Max Ebb
Mon -- 09:44 AM EDT     0.00 knots Slack
Mon -- 11:23 AM EDT     Moonrise
Mon -- 12:58 PM EDT     1.79 knots Max Flood
Mon -- 03:22 PM EDT     -0.00 knots Slack
Mon -- 07:22 PM EDT     -2.16 knots Max Ebb
Mon -- 07:37 PM EDT     Sunset
Mon -- 09:33 PM EDT     Moonset
Mon -- 10:12 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Winterport, Penobscot River (depth 7 ft), Maine Current does not exist in database. Press Edit above and select a valid nearby location.

Winterport, Penobscot River (depth 7 ft), Maine Current, knots
12
am
1.7
1
am
1.7
2
am
0.9
3
am
-0
4
am
-0.3
5
am
-0.8
6
am
-1.8
7
am
-2.2
8
am
-1.7
9
am
-0.7
10
am
0.2
11
am
0.8
12
pm
1.4
1
pm
1.8
2
pm
1.3
3
pm
0.3
4
pm
-0.2
5
pm
-0.5
6
pm
-1.3
7
pm
-2.1
8
pm
-1.9
9
pm
-1.1
10
pm
-0.2
11
pm
0.5

Area Discussion for Caribou, ME
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FXUS61 KCAR 171146 AFDCAR

Area Forecast Discussion National Weather Service Caribou ME 746 AM EDT Mon Aug 17 2026

WHAT HAS CHANGED
- Refine PoPs and QPF today to dry things out just a little in the far north based on current breaks moving in, and to dry things out some from Bangor south as the rain is having trouble getting this far south.

KEY MESSAGES
1) Rain moving in from the west with locally heavy rainfall possible over central and northern portions of the area early this morning. Flooding is not expected.

2) Chance for showers Wednesday afternoon into Thursday as a cold front crosses the area.

DISCUSSION
KEY MESSAGE 1...Rain moving in from the west with locally heavy rainfall possible over central and northern portions of the area early this morning. Flooding is not expected.

KEY MESSAGE 1 DESCRIPTION...
Occluded front sitting just to the east of James Bay and the Ontario/Quebec border as of 05z. Most of the heavy rain is just now entering into nw portions of the CWA This looks to be the co-located with the low-level jet and gradient of higher pwats per latest TPW satellite imagery. Guidance is now indicating this will shift east thru 12z this morning. At the same time surface boundary enhancing lift in srn Quebec, just to the north of New England and expect this to track into the Central Highlands within the next 2-3 hours. As it heads into the western Maine mountains orographic may help enhance heavy rainfall early this morning thus have kept heaviest totals thru 12z over the Central Highlands.

LLJ pushes east into NB by 15z this morning with steady rain coming to an end. However with front still lingering back to the west there will be plenty of forcing to keep showers going over most of the area this afternoon and evening.

Have continued with trend of prior shift with slgt chc to lochc pops this afternoon and evening before increasing to likely tonight as coastal low rides to the south of the waters overnight. Patchy fog expected over most of the area tonight as occluded front pretty much dies in place. Downeast likely to see areas of fog late tonight with humid airmass remaining in place.

KEY MESSAGE 2...Chance for showers Wednesday afternoon into Thursday as a cold front crosses the area.

KEY MESSAGE 2 DESCRIPTION... As the low pressure system exits over the Maritimes, the next low pressure system centered over the Hudson Bay begins to track E. The associated cold front is expected to move into the region Wednesday evening and exit Thursday afternoon. Ensemble models have been trending towards a drier solution with isolated showers. Little QPF is expected with these showers. There is a possibility for a few rumbles of thunder but nothing severe.

AVIATION /12Z MONDAY THROUGH FRIDAY/
Today.. MVFR/IFR, occasional LIFR. Rain may be heavy at times early this morning. Isolated tstm may be possible in the afternoon but confidence remains too low to include. S winds 10-20kts. LLWS at FL020 from 200 at 30-35kts at Aroostook terminals for the next 1-2 hours.

Tonight...IFR or lower with fog developing all terminals. S winds 5kts become near calm late.

Tuesday...Mainly VFR with MVFR in showers and an isolated tstm in the afternoon. ENE winds 5-10kts.

Tuesday night: VFR. Light and variable winds.

Wednesday-Wednesday night: VFR early, with increasing chance for MVFR/IFR for north terminals into the afternoon as isolated showers and thunderstorms move into the area. SW winds 5 to 10 kts.

Thursday-Thursday night: VFR. Winds W to NW at 5 to 10 kts, light and variable overnight.

Friday: VFR. W winds 5-10 kts.

MARINE
Winds remain aob 20kts over all waters thru Tuesday. Seas increase to near 4ft this afternoon before diminishing this evening. Seas remain between 1-3 feet into Tuesday afternoon before increasing above 5ft over waters from 25-60NM.

Winds and seas below SCA criteria mid to late week. Generally SW winds, gusts to 15 kt, over the waters.

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 38 mi59 minWSW 6G20 68°F 54°F29.88
44033 - Buoy F0103 - West Penobscot Bay 41 mi89 minS 9.7G12 61°F


Wind History for Bar Harbor, ME
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KBGR Bangor International Airport US12 sm65 minS 113/4 smOvercast Lt Rain Mist 66°F64°F94%29.87

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GEOS Local Image of north east  
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Portland, ME,





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