Cape Elizabeth ME to Merrimack River MA Marine Forecast
| Today...S Winds 5 To 10 Kt, Increasing To 10 To 15 Kt With Gusts Up To 20 Kt Late. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 6 Seconds. |
| Tonight...S Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 4 Ft. Wave Detail: S 3 Ft At 5 Seconds. A Chance Of Showers. Patchy Fog In The Evening. Patchy Fog After Midnight. Vsby 1 To 3 Nm, Decreasing To 1 Nm Or Less After Midnight. |
| Thu...Sw Winds 5 To 10 Kt, Becoming Se In The Afternoon. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 6 Seconds. Patchy Fog. A Chance Of Showers In The Afternoon. Vsby 1 Nm Or Less, Increasing To 1 To 3 Nm In The Afternoon. |
| Thu Night...E Winds Around 5 Kt. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 8 Seconds. Patchy Fog. Vsby 1 To 3 Nm. |
| Fri...E Winds Around 5 Kt, Increasing To 5 To 10 Kt In The Afternoon. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 8 Seconds. Patchy Fog In The Morning With Vsby 1 To 3 Nm. |
| Fri Night...Se Winds 5 To 10 Kt. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 8 Seconds. A Chance Of Showers After Midnight. |
| Sat...Se Winds 5 To 10 Kt. Seas Around 2 Ft. A Chance Of Showers In The Morning. |
| Sat Night...S Winds 5 To 10 Kt, Becoming Sw After Midnight. Seas Around 2 Ft. |
| Sun...Sw Winds 5 To 10 Kt, Becoming S 10 To 15 Kt With Gusts Up To 20 Kt In The Afternoon. Seas Around 2 Ft. |
| Sun Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft. A Chance Of Showers. |
| Area Forecast Discussion National Weather Service Gray ME 634am EDT Wednesday Jun 10 2026 .WHAT HAS CHANGED... changes needed to the rest of the forecast. .KEY MESSAGES... 1. Increasing humidity is going to pose at least a moderate heat risk in most locations through Friday. 2. Afternoon showers and thunderstorms may pose an excessive rainfall risk due to the elevated moisture and weak upper level flow today and Thursday. 3. Other than a mostly dry Sunday, daily chances of showers return into early next week, but confidence is low. Temperatures trend closer to normal, perhaps a few degrees above. KEY MESSAGE 1 DESCRIPTION... The increase in humidity will be noticble today as a moist air mass advects into the region. It will only begin to gradually dry out from north to south on Thursday but much of the forecast area will see heat indices in the 85 to 95 degree range with the hottest readings being in the Merrimack Valley of NH. That would be the best candidate for a heat advisory on Thursday, but at this time it looks to be marginal. KEY MESSAGE 2 DESCRIPTION... Increasing heat and humidity is going to lead to daily chances for afternoon showers and thunderstorms through Thursday. The risk for strong to severe storms is fairly low despite the hot weather. This is due to the paltry deep layer wind shear and weak mid level lapse rates. However, a strong to marginally severe pulse storm can't be ruled out this afternoon and evening as well as Thursday afternoon with a 25-30 K theta-E differential between the SFC and mid levels at many locations, especially Thursday across southern zones. The thunderstorm threat may continue through this evening due to continued height falls in association with a weak short wave trough moving eastward just to our north. The activity should quickly wane late in the evening. One thing we will have is very high precipitable water values today and Thursday (nearing 2 inches in some spots) with fairly light mid and upper level winds. This could lead to a few slow moving or training storms which could pose a threat for localized flash flooding with such high atmospheric moisture content. KEY MESSAGE 3 DESCRIPTION... By Friday night, a 500mb ridge flattens as an upper-level low moves eastward across northern Canada. This will allow for a more zonal pattern across the northeastern US this weekend, with a cold front moving through on Friday. The frontal passage will being thunderstorm chances to the area Friday evening. Wraparound showers are likely to persist through the weekend as the attached surface low slowly moves into the Canadian Maritimes. Ensembles show a large spread of solutions for what happens beyond Saturday, though unsettled weather could potentially remain in the forecast for Sunday and early next week. Marine Generally quiet weather is expected on the waters through Friday with afternoon seabreezes as high pressure remains in the vicinity of the Gulf of Maine. Increasing moisture will likely lead to fog development tonight into Friday. A cold front will cross the waters Saturday afternoon, but current forecasts call for winds and seas remaining below SCA criteria into early next week. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...None. NH...None. Marine None. |
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