Cape Elizabeth ME to Merrimack River MA Marine Forecast
| Tonight...W Winds 5 To 10 Kt. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 7 Seconds. |
| Thu...Sw Winds Around 5 Kt, Becoming S In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 8 Seconds. |
| Thu Night...S Winds 5 To 10 Kt. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 8 Seconds. A Chance Of Showers After Midnight. Patchy Fog After Midnight With Vsby 1 To 3 Nm. |
| Fri...S Winds 5 To 10 Kt, Increasing To 10 To 15 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: S 2 Ft At 7 Seconds. Patchy Fog In The Morning. Showers Likely. Vsby 1 To 3 Nm In The Morning. |
| Fri Night...Sw Winds 5 To 10 Kt, Becoming Nw After Midnight. Seas 2 To 3 Ft. Wave Detail: Se 2 Ft At 5 Seconds. |
| Sat...Ne Winds Around 5 Kt, Becoming E In The Afternoon. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 6 Seconds. |
| Sat Night...Se Winds Around 5 Kt, Becoming Nw After Midnight. Seas Around 2 Ft. |
| Sun...N Winds Around 5 Kt, Becoming Se In The Afternoon. Seas Around 2 Ft. |
| Sun Night...S Winds Around 5 Kt, Becoming W After Midnight. Seas Around 2 Ft. |
| Mon...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 2 Ft. |
| Mon Night...S Winds 5 To 10 Kt. Seas Around 2 Ft. |
| Area Forecast Discussion National Weather Service Gray ME 732pm EDT Wednesday Jun 24 2026 .WHAT HAS CHANGED... Thunderstorms have all but moved out of our forecast area and showers continue to diminish quickly as we approach sunset as well. No major changes were needed for this update other than to .KEY MESSAGES... 1. Similar temperatures expected Thursday with scattered afternoon showers and isolated storms. 2. Rain moves in Thursday night followed by a chance of thunderstorms Friday afternoon. 3. Unsettled seasonable weather with daily shower and thunderstorm chances will persist through the weekend before a potent upper-level ridge builds into the region next week, returning heat and humidity. KEY MESSAGE 1 DESCRIPTION... An upper low will move east into the far northern ME by early this evening. Broad lift from the low and daytime instability will continue the chance for scattered showers and isolated storms, mostly in and around the mountain. A storm or two may produce small hail as freezing levels remain fairly low aloft. Chances then drop off quickly toward sunset. Can't completely rule out a brief shower or two elsewhere, but in general partly sunny and pleasant conditions are expected the rest of the afternoon with temperatures in the 70s to around 80 with somewhat breezy conditions of 20-25 mph at times. Tonight remains dry with partly cloudy skies and temperatures in the 50s. Similar temperatures are expected for Thursday with mostly upper 70s to low 80s, except the coast may stay a bit cooler with the seabreeze developing and moving ashore a little quicker. Clouds begins to increase mid to late morning with scattered showers and isolated storms developing in the afternoon to early evening hours, mainly across the interior. KEY MESSAGE 2 DESCRIPTION... The better forcing arrives late Thursday night as a shortwave trough crosses the region, allowing rain to overspread northern New England overnight with some embedded rumbles of thunder possible. Models are trending faster with this round of rainfall with hints it tapers off from west to east during the mid to late morning hours on Friday. This round may bring between 0.25" and 0.75" on a larger scale, but the HRRR (High-Resolution Rapid Refresh) and NAMnest are suggesting a stripe of locally higher amounts of 1-2" may occur. The faster trend will bring a longer/better opportunity for the atmosphere to destabilize going into the afternoon as the surface low and cold front approach from the west. Deep layer sheer of 40-45 kt will be supportive of strong to severe thunderstorms, but there remains uncertainty in how much instability will be achieved via any clearing with varying solutions among model guidance. It certainly bears watching trends as the latest NAM, RAP, and RRFS suggest SBCAPE may reach 1000-1500 J/Kg across parts of NH and far western ME. If storms do materialize, the primary hard will be damaging winds and also hail. There may also be enough directional shear to support a brief tornado or two. KEY MESSAGE 3 DESCRIPTION... Our system on Friday starts wrapping up towards the evening hours and begins exiting into the Canadian Maritimes, although some lingering showers will be expected into the early evening hours on Friday. Looking ahead toward the weekend, temperatures should be mostly confined to the mid-to-upper 70s, with some places in Southern New Hampshire reaching the low 80s. Weak waves of low pressure riding on the eastern periphery of the ridge will dip into the region this weekend, and when combined with diurnal heating will trigger scattered showers and storms. Most Hi- Res models keep a majority of Saturday clear due to uncertainty in the timing of the shortwave, therefore probability of precipitation are slightly lower than Sunday. Moving into early next week, the temperatures slowly start to build into the low to mid 80s, with our pattern supporting daily chances for diurnal showers and storms, especially inland and away from the coast. Furthermore, upcoming trends indicate a hotter pattern towards the lead up of the July 4th weekend, with increasing dewpoints in the 60s towards 70, making things feel a bit more muggy than it has been as of late. This heat is supported by the eastward progress of the upper level ridge, driving H850 temps into the upper teens. We should see temperatures getting back well into the 80s, and even near 90 in typically warmer spots within the Merrimack Valley later next week. Marine Through Friday...Conditions are expected to remain below SCA (Small Craft Advisory) levels through Friday. West will be out of the west to southwest through tonight before becoming more southerly Thursday through Friday as a cold front and low pressure approach. There waters will see increasing chances for rain showers Thursday night and Friday along with the possibility of fog. Winds and seas are subsiding as front moves further offshore Friday night into Saturday. S-SW winds return Sunday into next week, though looks to remain below SCA (Small Craft Advisory) conditions. Isolated showers possible Sat/Sunday with the shortwave, but best chances are inland. No sign of concerning swells. NOAA Gray/Portland ME Office - Watches - Warnings - Advisories ME...None. NH...None. Marine None. |
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