Penobscot Bay Marine Forecast
| Today...W Winds 25 To 30 Kt With Gusts Up To 40 Kt. Seas 3 To 5 Ft. Wave Detail: S 4 Ft At 9 Seconds. Light Freezing Spray This Morning. |
| Tonight...W Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt After Midnight. Gusts Up To 30 Kt. Seas 2 To 4 Ft. Wave Detail: W 2 Ft At 3 Seconds. |
| Sat...Sw Winds 10 To 15 Kt. Seas Around 2 Ft. |
| Sat Night...W Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas Around 2 Ft. Wave Detail: S 2 Ft At 5 Seconds. A Chance Of Snow After Midnight. |
| Sun...Nw Winds 5 To 10 Kt, Becoming N 10 To 15 Kt With Gusts Up To 20 Kt In The Afternoon. Seas Around 2 Ft. A Chance Of Snow. Vsby 1 Nm Or Less In The Afternoon. |
| Sun Night...N Winds 15 To 20 Kt With Gusts Up To 30 Kt. Seas 2 To 3 Ft. A Chance Of Snow In The Evening. Vsby 1 Nm Or Less. |
| Mon...Nw Winds 15 To 20 Kt With Gusts Up To 30 Kt. Seas 2 To 3 Ft. |
| Mon Night...Nw Winds 15 To 20 Kt With Gusts Up To 25 Kt, Becoming W 5 To 10 Kt After Midnight. Seas 2 To 3 Ft. |
| Tue...Nw Winds 5 To 10 Kt. Seas Around 2 Ft. |
| Tue Night...W Winds Around 5 Kt, Becoming Sw 10 To 15 Kt With Gusts Up To 20 Kt After Midnight. Seas Around 2 Ft. |
| Area Forecast Discussion National Weather Service Gray ME 1227am EST Fri Dec 12 2025 Synopsis Today will be another chilly day with gusty winds and mountain snow showers. That will come to an end as a coastal storm passes well out to sea Saturday night into Sunday. This system may come close enough for a little light snow along the coast, but will most likely stay well enough away. That will be followed up by another very cold and gusty Monday. Expect the wind chills to remain in the teens and single digits. Near Term - Through Today High pressure continues to gradually build in through the day today, but gusty winds and seasonably cold conditions continue through the day. Gusts of 30 to 40 MPH continue. Upslope snow showers continue across the higher terrain, with partly sunny skies downwind of the mountains. Highs range from around 20 across the north, to the 20s to lower 30s most places elsewhere. .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY/... Winds ease tonight as the ridge axis moves across northern New England. Upslope snow showers dissipate through the evening across the higher terrain, with mainly clear skies expected in most spots through the overnight hours. Temps cool into the single digits and teens again tomorrow night, but wind chills won't be much cooler than temps through the overnight. A few showers will be possible later Saturday afternoon as a weak frontal system approaches. Long Term - Saturday Night Through Thursday By Saturday night, the region transitions back into southwest flow aloft as a closed low approaches, riding down the Ontario/CONUS border overnight and through the day on Sunday. While the upper low will likely lead to some light snow across the forecast area, most of the shortwave forcing will mainly track south and east out to sea. A few ensemble solutions continue bringing the bulk of light snow farther north, but generally under 20 percent of them. Thus, there is still a low probability for some impactful weather but trends continue to diminish. The best chance for some light snow accumulations will likely be over southern New Hampshire and maybe a little bit of coastal Maine. Some low probability snow chances may hang around into Monday morning near the coast and through the day across the mountains in the upslope regime. A reinforcing cold front will also cross the area on Sunday which will lead to frigid conditions Monday morning and blustery conditions through the day. Lows are forecast to mainly range from around zero across portions of the north, to the upper single digits and lower teens south. Strengthening westerly winds will lead to widespread below zero wind chills Monday morning with some double digit readings below zero across the north. It should stay cold and windy through the day with highs only rising into the upper single digits across portions of the north, to the lower 20s south. With winds remaining breezy through the day, wind chill values will likely remain below zero north and only rise into the single digits above most elsewhere. Tuesday morning lows will be very similar to Monday but with less wind. The warmup then begins in earnest on Tuesday afternoon as highs rise into upper teens and lower 20s north, to the upper 20s and lower 30s south. By Thursday, the NBM has forecast highs ranging from the low to mid 30 north, to the low to mid 40s south. There are also some signals in the long term ensembles that these warmer temperatures could extend into Friday and the weekend. A weak shortwave trough will approach Wednesday night into Thursday which will lead to some low precipitation chances in the form of light rain and snow. Marine Short Term Westerly gales continue into late this afternoon and early evening as low pressure deepens across the Canadian Maritimes, and high pressure builds in from the west. SCA (Small Craft Advisory) conditions linger through this evening, and then continue to slow ease into Saturday. Long Term For Saturday night into Sunday, some light snow may reduce visibility but winds and seas will remain below SCA (Small Craft Advisory) thresholds. On Monday, westerly winds become gusty again as a period of gale force gusts is possible, potentially including the bays as well. Winds and seas will remain elevated at times through midweek as high pressure builds eastward. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...None. NH...None. Marine Gale Warning until 9pm EST Friday for ANZ150-152-154. Gale Warning until 5pm EST Friday for ANZ151-153. |
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