Marine Weather and Tide Forecast for Thomaston, ME
 | Sunrise 6:50 AM Sunset 6:00 PM Moonrise 9:05 AM Moonset 6:30 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
ANZ150 Coastal Waters From Stonington, Me To Port Clyde, Me Out 25 Nm- 502 Pm Edt Mon Oct 12 2026
.small craft advisory in effect through Wednesday afternoon - .
Tonight - N winds 10 to 15 kt with gusts up to 20 kt, becoming ne 15 to 20 kt with gusts up to 30 kt late this evening and overnight. Seas 3 to 5 ft, building to 5 to 7 ft after midnight. Wave detail: S 5 ft at 10 seconds, becoming ne 5 ft at 5 seconds and S 5 ft at 9 seconds.
Tue - E winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Wave detail: E 5 ft at 7 seconds and S 4 ft at 9 seconds. A chance of rain in the morning, then rain in the afternoon with vsby 1 to 3 nm.
Tue night - SE winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 7 ft. Wave detail: se 7 ft at 7 seconds. Rain. Vsby 1 to 3 nm.
Wed - W winds 10 to 15 kt with gusts up to 20 kt, becoming nw 5 to 10 kt in the afternoon. Seas 5 to 7 ft. Wave detail: se 7 ft at 7 seconds.
Wed night - NW winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt after midnight. Seas 3 to 5 ft. Wave detail: se 4 ft at 7 seconds.
Thu - NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft. Wave detail: nw 3 ft at 3 seconds and S 3 ft at 7 seconds.
Thu night - N winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft.
Fri - SE winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Seas 2 to 4 ft. Showers.
Fri night - SW winds around 20 kt with gusts up to 30 kt, becoming W 25 to 30 kt with gusts up to 40 kt after midnight. Seas 5 to 7 ft. Showers.
Sat - NW winds 25 to 30 kt with gusts up to 45 kt. Seas 5 to 8 ft. A chance of showers in the morning.
Sat night - NW winds 25 to 30 kt with gusts up to 45 kt. Seas 5 to 7 ft.
ANZ100 502 Pm Edt Mon Oct 12 2026
Synopsis for stonington me to merrimack river ma out to 60 nm - Another area of rain will move across the gulf of maine through Tuesday. Winds turn northwesterly Wednesday and may be gusty from casco bay north. A coastal storm is possible for the weekend which could bring another round of rain and gusty winds.
7 Day Forecast for Marine Location Near Thomaston, ME
NEW! Add second zone forecast
| Tenants Harbor Click for Map Mon -- 12:27 AM EDT 9.84 feet High Tide Mon -- 06:24 AM EDT 0.45 feet Low Tide Mon -- 06:47 AM EDT Sunrise Mon -- 09:04 AM EDT Moonrise Mon -- 12:35 PM EDT 10.43 feet High Tide Mon -- 05:58 PM EDT Sunset Mon -- 06:30 PM EDT Moonset Mon -- 06:55 PM EDT -0.32 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Tenants Harbor, Maine, Tide feet
| 12 am |
| 9.7 |
| 1 am |
| 9.7 |
| 2 am |
| 8.4 |
| 3 am |
| 6.2 |
| 4 am |
| 3.7 |
| 5 am |
| 1.6 |
| 6 am |
| 0.5 |
| 7 am |
| 0.7 |
| 8 am |
| 2 |
| 9 am |
| 4.3 |
| 10 am |
| 6.9 |
| 11 am |
| 9 |
| 12 pm |
| 10.2 |
| 1 pm |
| 10.3 |
| 2 pm |
| 9.2 |
| 3 pm |
| 7 |
| 4 pm |
| 4.4 |
| 5 pm |
| 1.9 |
| 6 pm |
| 0.2 |
| 7 pm |
| -0.3 |
| 8 pm |
| 0.4 |
| 9 pm |
| 2.2 |
| 10 pm |
| 4.7 |
| 11 pm |
| 7.1 |
| Andrews Island Click for Map Flood direction 11 true Ebb direction 155 true Mon -- 12:40 AM EDT -0.00 knots Slack Mon -- 03:18 AM EDT -0.64 knots Max Ebb Mon -- 06:47 AM EDT Sunrise Mon -- 07:07 AM EDT 0.00 knots Slack Mon -- 09:03 AM EDT Moonrise Mon -- 09:33 AM EDT 0.37 knots Max Flood Mon -- 12:41 PM EDT -0.00 knots Slack Mon -- 03:39 PM EDT -0.69 knots Max Ebb Mon -- 05:57 PM EDT Sunset Mon -- 06:29 PM EDT Moonset Mon -- 07:34 PM EDT 0.00 knots Slack Mon -- 10:05 PM EDT 0.40 knots Max Flood Tide / Current data from XTide NOT FOR NAVIGATION |
Andrews Island, ESE of (depth 15 ft), West Penobscot Bay, Maine Current, knots
| 12 am |
| 0.2 |
| 1 am |
| -0.1 |
| 2 am |
| -0.4 |
| 3 am |
| -0.6 |
| 4 am |
| -0.6 |
| 5 am |
| -0.5 |
| 6 am |
| -0.3 |
| 7 am |
| -0 |
| 8 am |
| 0.2 |
| 9 am |
| 0.3 |
| 10 am |
| 0.4 |
| 11 am |
| 0.3 |
| 12 pm |
| 0.1 |
| 1 pm |
| -0.1 |
| 2 pm |
| -0.4 |
| 3 pm |
| -0.6 |
| 4 pm |
| -0.7 |
| 5 pm |
| -0.6 |
| 6 pm |
| -0.4 |
| 7 pm |
| -0.1 |
| 8 pm |
| 0.1 |
| 9 pm |
| 0.3 |
| 10 pm |
| 0.4 |
| 11 pm |
| 0.3 |
Area Discussion for Gray/Portland, ME
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FXUS61 KGYX 121845 AFDGYX
Area Forecast Discussion National Weather Service Gray ME 245 PM EDT Mon Oct 12 2026
WHAT HAS CHANGED
Most recent model guidance has trended the forecast colder. The colder trend allowed for the possibility of more snow and ice across Franklin and Somerset counties. Opted to move the forecast in this direction as well due to a historical warm bias in the models during cold air dam setups like this one.
KEY MESSAGES
1. A back door cold front brings colder air tonight with low pressure crossing on Tuesday. Mainly a cold, beneficial rain is expected Tuesday while the mountains and parts of central Somerset County see at least the first snow flakes of the season. Secondary roads branching off from ME-27 or US-201 north of Skowhegan/Farmington may become slick Tuesday afternoon.
2. Drier and breezy conditions return late Wednesday and Thursday with high pressure.
3. Low pressure passes through on Friday, with cold and windy conditions behind the system for the weekend..
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
This evening, a dry backdoor cold front will move south from Canada.
A stray shower can not be ruled out north of the mountains.
Temperatures look to cool drastically after the frontal passage. For instance, in Kennebec county, temperatures should be in the upper 60s currently. By tomorrow morning, temperatures will be in the upper 30s, with below freezing temperatures likely north of the mountains, and temperatures in the 40s along the coast and southern New Hampshire.
High pressure over New Brunswick will allow for light northeasterly winds through the day Tuesday, and should largely prevent temperatures from warming up through the day. This is meteorological phenomena called a cold air dam. For the population corridor, this likely will not pose any issues, as the cold temperatures will likely stay above freezing. Perhaps more concerning is how temperatures pan out across north-central Maine and how long the cold air dam hangs on to below-freezing or near freezing temperatures across northwestern Maine.
Low pressure will move in Tuesday morning, with rain across most locations and freezing rain expected in elevations above 3000ft. For the frozen side of the storm, model guidance today has had a desire to bring more wintry precipitation into North-central Maine.
From pattern recognition this makes sense given the guidance is almost always too warm during cold air damming. However, I don't quite see this as translating to more snow, rather longer durations of mixed- precipitation: snow, sleet and freezing rain. If it does snow, A thick isothermic layer in the low- levels should keep SLRs very low, and generally make it very difficult for any periods of all-snow.
By Tuesday night, high pressure over New Brunswick will continue to drift eastward. This will in turn, disrupt the consistent northeasterly winds that form and maintain the cold air dam. Without these northeasterly winds, warm air aloft is much more likely to mix down to the surface and will result in all locations in western Maine changing over to rain late in the evening. By this time most of the storm is over, and will depart the region overnight. Skies may even clear out a little by Wednesday morning.
For wintry accumulations, we're not expecting much. The low SLRs and an eventual changeover to ice and then plain rain should prevent snow from accumulating in this area, but just enough snow and sleet to form a coating to an inch is certainly possible up by Jackman or Moosehead Lake. However, even a trace of icing can make roads slippery so drivers in this part of the state should heed caution.
For rainfall amounts, the bulk of the precipitation is likely to fall across northern NH and Maine, with at over an inch likely in the northern half of NH and locations north of Portland. Southern NH and York county are most likely looking at less, likely closer to a half an inch.
KEY MESSAGE 2 DESCRIPTION...
The low gradually moves away during the daytime on Wednesday.
Scattered showers likely linger across the higher terrain much of the day, while areas downwind of the mountains gradually dry out through the day. Temperatures warm once winds shift to westerly behind the system, which will take until late in the day for areas further east. Southern New Hampshire stands the best chance to see temperatures jump into the low to mid 70s in the afternoon, but areas further north and east will be pressed for time before the sunset to actually realize the warmer temperatures forecast by the NBM.
Relatively cooler and drier air settles in for Thursday as high pressure builds across New England. Conditions look seasonable, with highs ranging from the upper 40s across the north, to low 60s along the coast.
KEY MESSAGE 3 DESCRIPTION...
By Friday, low pressure rides eastward into New England. The low deepens as it passes through, and becomes a pretty strong coastal storm as it moves through the Canadian Maritimes.
Another round of beneficial rain looks likely during the Friday to Friday Night timeframe, with generally a half inch to an inch of QPF.
As the low deepens while moving through the Canadian Maritimes, a strong northwesterly flow develops across New England.
Currently, a small area of modified Arctic air looks to be directed into New England this weekend. There remains the chance that this airmass misses us to the east. However, at this time a cold airmass for mid October looks likely for the weekend, along with gusty winds. Highs in the 30s and 40s look likely for Saturday, along with mountain snow showers. Lows likely dip below freezing all the way to the coastline in most areas, with widespread lows in the 20s. Temperatures look similarly chilly with less wind on Sunday, before temps begin to rebound early next week.
AVIATION /18Z MONDAY THROUGH SATURDAY/
VFR and MVFR CIGs will lower overnight as a low moves in from the west. IFR is expected on Tuesday as a system brings rain and low stratus into the area. While some winter weather is expected, all routine TAF sites should stay plain rain through the entirety of the event. However, a light glaze of ice could occur at Rangeley and Carrabassett Valley Muni Airports, with snow and ice likely in Jackman. Conditions improve Tuesday night as the aforementioned low exits the region.
OUTLOOK:
Wednesday...VFR Expected, MVFR possible in the mountains due to upslope showers.
Thursday...VFR Expected.
Friday.. MVFR Expected, with widespread rainfall. Lower CIGs and Visibilities may be possible in rain and snow showers in the mountains.
Saturday...VFR Expected south of the mountains, with IFR in the mountains, with KLEB and KHIE. IFR CIGs are possible here due to the potential for rain and snow showers.
MARINE
Light winds and seas this evening. Overnight winds shift to northeasterlies and strengthen to SCA levels. Seas of 4-6ft expected tonight. Easterly SCA winds continue through the day tomorrow and seas holding steady at 4-6ft through Tuesday night.
Low pressure departs on Wednesday. SCA conditions are possible in westerly winds behind this system into Thursday. High pressure then crosses on Thursday with fair conditions. Low pressure crosses the waters on Friday, with northwesterly gales possible behind this system late Friday and Saturday.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None.
NH...None.
MARINE...Small Craft Advisory from 8 PM this evening to 2 PM EDT Wednesday for ANZ150-152-154.
Gale Warning from 8 PM this evening to 5 AM EDT Tuesday for ANZ180.
Area Forecast Discussion National Weather Service Gray ME 245 PM EDT Mon Oct 12 2026
WHAT HAS CHANGED
Most recent model guidance has trended the forecast colder. The colder trend allowed for the possibility of more snow and ice across Franklin and Somerset counties. Opted to move the forecast in this direction as well due to a historical warm bias in the models during cold air dam setups like this one.
KEY MESSAGES
1. A back door cold front brings colder air tonight with low pressure crossing on Tuesday. Mainly a cold, beneficial rain is expected Tuesday while the mountains and parts of central Somerset County see at least the first snow flakes of the season. Secondary roads branching off from ME-27 or US-201 north of Skowhegan/Farmington may become slick Tuesday afternoon.
2. Drier and breezy conditions return late Wednesday and Thursday with high pressure.
3. Low pressure passes through on Friday, with cold and windy conditions behind the system for the weekend..
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
This evening, a dry backdoor cold front will move south from Canada.
A stray shower can not be ruled out north of the mountains.
Temperatures look to cool drastically after the frontal passage. For instance, in Kennebec county, temperatures should be in the upper 60s currently. By tomorrow morning, temperatures will be in the upper 30s, with below freezing temperatures likely north of the mountains, and temperatures in the 40s along the coast and southern New Hampshire.
High pressure over New Brunswick will allow for light northeasterly winds through the day Tuesday, and should largely prevent temperatures from warming up through the day. This is meteorological phenomena called a cold air dam. For the population corridor, this likely will not pose any issues, as the cold temperatures will likely stay above freezing. Perhaps more concerning is how temperatures pan out across north-central Maine and how long the cold air dam hangs on to below-freezing or near freezing temperatures across northwestern Maine.
Low pressure will move in Tuesday morning, with rain across most locations and freezing rain expected in elevations above 3000ft. For the frozen side of the storm, model guidance today has had a desire to bring more wintry precipitation into North-central Maine.
From pattern recognition this makes sense given the guidance is almost always too warm during cold air damming. However, I don't quite see this as translating to more snow, rather longer durations of mixed- precipitation: snow, sleet and freezing rain. If it does snow, A thick isothermic layer in the low- levels should keep SLRs very low, and generally make it very difficult for any periods of all-snow.
By Tuesday night, high pressure over New Brunswick will continue to drift eastward. This will in turn, disrupt the consistent northeasterly winds that form and maintain the cold air dam. Without these northeasterly winds, warm air aloft is much more likely to mix down to the surface and will result in all locations in western Maine changing over to rain late in the evening. By this time most of the storm is over, and will depart the region overnight. Skies may even clear out a little by Wednesday morning.
For wintry accumulations, we're not expecting much. The low SLRs and an eventual changeover to ice and then plain rain should prevent snow from accumulating in this area, but just enough snow and sleet to form a coating to an inch is certainly possible up by Jackman or Moosehead Lake. However, even a trace of icing can make roads slippery so drivers in this part of the state should heed caution.
For rainfall amounts, the bulk of the precipitation is likely to fall across northern NH and Maine, with at over an inch likely in the northern half of NH and locations north of Portland. Southern NH and York county are most likely looking at less, likely closer to a half an inch.
KEY MESSAGE 2 DESCRIPTION...
The low gradually moves away during the daytime on Wednesday.
Scattered showers likely linger across the higher terrain much of the day, while areas downwind of the mountains gradually dry out through the day. Temperatures warm once winds shift to westerly behind the system, which will take until late in the day for areas further east. Southern New Hampshire stands the best chance to see temperatures jump into the low to mid 70s in the afternoon, but areas further north and east will be pressed for time before the sunset to actually realize the warmer temperatures forecast by the NBM.
Relatively cooler and drier air settles in for Thursday as high pressure builds across New England. Conditions look seasonable, with highs ranging from the upper 40s across the north, to low 60s along the coast.
KEY MESSAGE 3 DESCRIPTION...
By Friday, low pressure rides eastward into New England. The low deepens as it passes through, and becomes a pretty strong coastal storm as it moves through the Canadian Maritimes.
Another round of beneficial rain looks likely during the Friday to Friday Night timeframe, with generally a half inch to an inch of QPF.
As the low deepens while moving through the Canadian Maritimes, a strong northwesterly flow develops across New England.
Currently, a small area of modified Arctic air looks to be directed into New England this weekend. There remains the chance that this airmass misses us to the east. However, at this time a cold airmass for mid October looks likely for the weekend, along with gusty winds. Highs in the 30s and 40s look likely for Saturday, along with mountain snow showers. Lows likely dip below freezing all the way to the coastline in most areas, with widespread lows in the 20s. Temperatures look similarly chilly with less wind on Sunday, before temps begin to rebound early next week.
AVIATION /18Z MONDAY THROUGH SATURDAY/
VFR and MVFR CIGs will lower overnight as a low moves in from the west. IFR is expected on Tuesday as a system brings rain and low stratus into the area. While some winter weather is expected, all routine TAF sites should stay plain rain through the entirety of the event. However, a light glaze of ice could occur at Rangeley and Carrabassett Valley Muni Airports, with snow and ice likely in Jackman. Conditions improve Tuesday night as the aforementioned low exits the region.
OUTLOOK:
Wednesday...VFR Expected, MVFR possible in the mountains due to upslope showers.
Thursday...VFR Expected.
Friday.. MVFR Expected, with widespread rainfall. Lower CIGs and Visibilities may be possible in rain and snow showers in the mountains.
Saturday...VFR Expected south of the mountains, with IFR in the mountains, with KLEB and KHIE. IFR CIGs are possible here due to the potential for rain and snow showers.
MARINE
Light winds and seas this evening. Overnight winds shift to northeasterlies and strengthen to SCA levels. Seas of 4-6ft expected tonight. Easterly SCA winds continue through the day tomorrow and seas holding steady at 4-6ft through Tuesday night.
Low pressure departs on Wednesday. SCA conditions are possible in westerly winds behind this system into Thursday. High pressure then crosses on Thursday with fair conditions. Low pressure crosses the waters on Friday, with northwesterly gales possible behind this system late Friday and Saturday.
GYX WATCHES/WARNINGS/ADVISORIES
ME...None.
NH...None.
MARINE...Small Craft Advisory from 8 PM this evening to 2 PM EDT Wednesday for ANZ150-152-154.
Gale Warning from 8 PM this evening to 5 AM EDT Tuesday for ANZ180.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| 44033 - Buoy F0103 - West Penobscot Bay | 13 mi | 67 min | 56°F | |||||
| 44032 - Buoy E0104 - Central Maine Shelf | 19 mi | 67 min | 56°F | |||||
| MISM1 - Matinicus Rock, ME | 23 mi | 27 min | W 12G | 56°F | 29.68 | 55°F |
Wind History for Portland, ME
toggle option: (graph/table)
Link to 5 hour of 5 minute data for KRKD
Terminal Aerodrome Forecast (TAF) for KRKD
Wind History Graph: RKD
(wind in knots)
GEOS Local Image of north east
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Portland, ME,
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