East of Ipswich Bay and the Stellwagen Bank Marine Sanctuary Marine Forecast
| Tonight...S Winds 20 To 25 Kt With Gusts Up To 30 Kt, Becoming W 25 To 30 Kt With Gusts Up To 40 Kt After Midnight. Seas 3 To 5 Ft. Wave Detail: W 5 Ft At 5 Seconds And Se 1 Foot At 4 Seconds. Rain Likely, Mainly This Evening. Patchy Fog This Evening With Vsby 1 To 3 Nm. |
| Tue...Nw Winds 25 To 30 Kt With Gusts Up To 40 Kt. Seas 5 To 7 Ft. Wave Detail: Nw 7 Ft At 6 Seconds And Se 1 Foot At 10 Seconds. |
| Tue Night...Nw Winds 20 To 25 Kt, Becoming W 15 To 20 Kt After Midnight. Gusts Up To 35 Kt. Seas 4 To 6 Ft. Wave Detail: Nw 6 Ft At 6 Seconds And Se 1 Foot At 10 Seconds. |
| Wed...W Winds 10 To 15 Kt, Becoming Sw 15 To 20 Kt In The Afternoon. Gusts Up To 25 Kt. Seas 2 To 4 Ft. Wave Detail: W 4 Ft At 5 Seconds And N 1 Foot At 3 Seconds. |
| Wed Night...Sw Winds 15 To 20 Kt With Gusts Up To 30 Kt, Becoming W 25 To 35 Kt With Gusts Up To 45 Kt After Midnight. Seas 3 To 5 Ft. Wave Detail: W 5 Ft At 5 Seconds And Se 2 Ft At 12 Seconds. Rain Likely. |
| Thu...Nw Winds 30 To 35 Kt With Gusts Up To 45 Kt, Diminishing To 25 To 30 Kt With Gusts Up To 35 Kt In The Afternoon. Seas 5 To 7 Ft. Wave Detail: Nw 7 Ft At 6 Seconds And Se 1 Foot At 11 Seconds. A Chance Of Rain In The Morning. |
| Thu Night...Nw Winds 20 To 25 Kt With Gusts Up To 30 Kt, Diminishing To 10 To 15 Kt With Gusts Up To 20 Kt After Midnight. Seas 4 To 6 Ft, Subsiding To 2 To 4 Ft After Midnight. |
| Fri...Sw Winds 15 To 20 Kt With Gusts Up To 30 Kt. Seas 2 To 4 Ft. |
| Fri Night And Sat...Sw Winds 20 To 25 Kt, Becoming W 15 To 20 Kt. Gusts Up To 30 Kt. Seas 3 To 5 Ft. Rain. |
| Sat Night...Nw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 4 Ft. Seas Are Reported As Significant Wave Height, Which Is The Average Of The Highest Third Of The Waves. Individual Wave Heights May Be More Than Twice The Significant Wave Height. |
| Area Forecast Discussion National Weather Service Boston/Norton MA 307pm EST Monday Nov 3 2025 Synopsis Rain this evening and continues into the first half of the night. A cold front passes through overnight, ending the rain and bringing a period of gusty winds through Tuesday. A series of cold fronts pass through southern New England throughout the week into the weekend, leading to more unsettled conditions. These will likely be followed by periods of dry weather between fronts as high pressure briefly creeps in between them. Near Term - Until 6am Tuesday Morning Key Messages: * Showers this evening, drying out overnight with gusty winds. Early this afternoon a mid-level southern stream shortwave moves across the waters of southern New England, leading to areas of light rain mainly across coastal Rhode Island, southeast Massachusetts, Cape cod, and the islands. Next round of showers comes as a cold front associated with a robust mid-level trough and surface low pressure moving across eastern Canada. Southwesterly flow increases PWATs (Precipitable Waters) between 0.8" to 1.0", enough moisture for periods of rainfall late this evening. Convection-Allowing Models (cams) shows a line of heavier showers moving quickly across the region from west to east, arriving to western massachusetts between 5pm/7pm and exiting the coast around midnight. Greatest rainfall, likely 0.25" to 0.50" falls along and east of the I-95 corridor, while areas west generally receive 0.10" or less. The cold front brings gusty northwest flow due to cold air advection (CAA), 925mb wind field are between 40 and 50 knots. Bufkit sounding mix down gusts of 25 to 35 mph, a tad stronger on Cape Cod and the islands with gusts of 35-45 mph. Low temperatures range between the upper 30s to middle 40s, cooler in the lower 30s across higher terrain of northwestern Massachusetts. Given the overall lighter rates and progressive nature of the system, flash flooding isn't a concern. However, leaf-clogged storm drains this time of year may factor in and keep the risk for isolated nuisance flooding/ponding possible. Short Term - 6am Tuesday Morning Through Tuesday Night Key Messages: * Strong wind gusts of 40 to 50 mph expected through Tuesday. Sunshine returns Tuesday, though it's windy, coming in the wake of a departing cold front/low pressure system and strong high pressure building to the southwest... Resulting in a robust pressure gradient Across the northeast. Full sunshine helps to deepen the boundary layer and tap into those stronger gusts aloft. Bufkit is well-mixed to 850mb+, where winds are 45 to 55 knots. With northwest flow, it's possible to tap into the stronger gusts and transfer them to the surface. Thinking that most of the area experiences gusts between 30 and 40 mph, with the strongest gusts across eastern-half of southern New England; such as the islands, Cape Cod where gusts are between 40-50 mph. * Wind Advisory 10pm Monday to 7pm Tue: Nantucket, Martha's Vineyard, Cape Cod, and Block Island for gusts up to 50 mph. * Wind Advisory 4am to 7pm Tue: All of eastern Massachusetts and Rhode Island for gusts up to 45 mph. Jet diminishes Tuesday evening, winds at the surface slacken into Tuesday night. Strongest winds exit the region by midnight, leaving wind gusts around 15 to 20 mph the rest of the night. Temperaturewise, highs are middle 50s and nighttime lows in the middle to upper 30s. Long Term - Wednesday Through Monday Key Messages... * Unsettled pattern with a series of cold fronts passing through during the week into the weekend with periods of dry weather between them during the day * Gusty winds post-front Wednesday night into Thursday * Mostly seasonable temperatures through the week with highs mostly in the 50s, occasionally dipping into the 40s A generally unsettled pattern is expected through the week into the weekend interspersed with periods of dry weather. The first of the frontal systems is expected to pass through Wednesday night into Thursday morning as a low passes over New England. Ahead of the front, S to SW flow will help advect in slightly warmer, more moist air. This with the lift from the front will produce some showers for a short period. Showers may be out of the region heading into the later morning hours Thursday. In the front's wake, gusty NW winds are expected to dominate much of Thursday, especially with clearing skies and good mixing. Winds diminish going into Thursday night as high pressure begins to creep in from the SW. Another frontal system pushes through Friday night, bringing another chance for some showers heading into the weekend. NAEFS guidance is indicating IVT reaching the 90th percentile of climatology over southern New England Friday night, lining up with elevated S flow with WAA (Warm Air Advection - the movement of warm air) (925 mb temperatures approach 10C in this period once again). Ensemble mean PWAT (Precipitable Water) values range between 0.8" and 0.95" pre- frontal passage; so with this elevated moisture and the approaching front, more showers are expected. High pressure returns once again to dry things out briefly heading into Sunday before another system pushes through heading into Monday. Through the whole week into the weekend, high temperatures are expected to remain primarily in the 40s and 50s behind the fronts, with some spots reaching the low 60s towards the southern coastlines and even up into SE MA ahead of the cold fronts amidst WAA. Marine Forecaster Confidence Levels... Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Key Messages: * Gale Warning brings strong NNW wind tonight through Tuesday. Monday through Tuesday Night... High confidence. Robust cold front brings WNW Gale Force winds of 30 and 40 knots to all waters surrounding southern New England tonight and continuing though Tuesday evening. The passage of the cold front brings showers this evening, but will quickly dry out overnight. Seas build overnight into Tuesday with seas nearshore 3 to 6 feet and offshore 6 to 9 feet. Seas will begin to decrease Tuesday night. Outlook /Wednesday through Saturday/... Wednesday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Local rough seas. Wednesday Night: gale force winds with gusts up to 45 kt. Areas of rough seas. Chance of rain. Thursday: Moderate risk for gale force winds with gusts up to 45 kt. Rough seas up to 13 ft. Slight chance of rain. Thursday Night: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Local rough seas. Friday: Moderate risk for Small Craft Advisory winds with local gusts up to 30 kt. Seas locally approaching 5 ft. Friday Night: Strong winds with gusts up to 35 kt. Areas of rough seas. Rain likely. Saturday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas. Rain likely. NOAA Boston MA Office: Watches - Warnings - Advisories CT...None. MA...Wind Advisory from 4am to 7pm EST Tuesday for MAZ004>007- 012>021-026. Wind Advisory from 10pm this evening to 7pm EST Tuesday for MAZ022>024. RI...Wind Advisory from 4am to 7pm EST Tuesday for RIZ001>007. Wind Advisory from 10pm this evening to 7pm EST Tuesday for RIZ008. Marine Gale Warning from 7pm this evening to 7pm EST Tuesday for ANZ230>237-250-251-254>256. |
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