Massachusetts Bay and Ipswich Bay Marine Forecast
| This Afternoon...Nw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 2 Ft At 3 Seconds And E 1 Foot At 10 Seconds. A Slight Chance Of Rain. |
| Tonight...Nw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 3 Ft At 4 Seconds And E 1 Foot At 9 Seconds. |
| Fri...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Nw 3 Ft At 4 Seconds And Ne 2 Ft At 7 Seconds. |
| Fri Night...Nw Winds 15 To 20 Kt. Seas 2 To 3 Ft. Wave Detail: N 2 Ft At 5 Seconds. |
| Sat...W Winds 10 To 15 Kt. Gusts Up To 20 Kt In The Morning. Seas 2 To 3 Ft. Wave Detail: Nw 2 Ft At 3 Seconds And Ne 2 Ft At 6 Seconds. |
| Sat Night...Sw Winds 10 To 15 Kt. Gusts Up To 20 Kt After Midnight. Seas Around 2 Ft. Wave Detail: W 2 Ft At 3 Seconds And Ne 1 Foot At 7 Seconds. Rain. |
| Sun...W Winds 20 To 25 Kt With Gusts Up To 30 Kt. Seas 2 To 3 Ft. Rain. |
| Sun Night...W Winds 20 To 25 Kt With Gusts Up To 30 Kt. Seas 3 To 4 Ft. A Chance Of Rain. |
| Mon And Mon Night...W Winds 20 To 25 Kt With Gusts Up To 30 Kt. Seas 3 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 207pm EST Thu Nov 13 2025 Synopsis Cool and windy conditions continue tonight through Friday with partly to mostly cloudy skies. A frontal system will bring mainly rain Saturday night into early Sunday, drying out Sunday afternoon. Windy and cool conditions follow Sunday night and Monday then diminishing wind and continued dry weather into midweek as high pressure builds in from the west. Near Term - Through Tonight Key Point * Cool and windy with wind chill values in the low 20s Upper-level trough and cold pool(a region of relatively cold air) remain parked to the east, sending several rounds of weak shortwave energy into the region. The first of those rounds moved through today, bringing some spotty showers and sprinkles along with increased cloud cover. Shower activity will begin to wane overnight as mid-level dry air works. Cool and breezy conditions continue overnight as the shortwave reinforces CAA. Overnight lows drop into the mid-to-upper 20s, but it will feel like the upper teens to low 20s with 10-20mph winds. Short Term - Friday Through Friday Night Key Point * Continued cool and windy conditions for Friday There is little change in the weather pattern for Friday, with the cold pool(a region of relatively cold air) still located just offshore to the east. Dry mid-level air should keep skies at least partly sunny, but diurnal cumulus will still form in the afternoon, despite the cold temperatures aloft. High temperatures will once again struggle to top the mid- 40s with gusty NW winds at 15-20mph. One more piece of shortwave energy moves through Friday night, but the loss of diurnal heating and continued mid-level dry air will keep any light rain offshore. Winds begin to weaken inland overnight, allowing overnight temperatures to drop to the low to mid- 20s away from urban areas and coasts. Long Term - Saturday Through Thursday Key Messages: * Dry and cool Sat * A frontal system will bring a period of rain Sat night into early Sunday which may begin as a brief period of freezing rain at the onset across higher elevations in northern MA * Drying out by Sunday afternoon and becoming blustery * Mainly dry Monday through Wed. Windy Monday with diminishing wind Tuesday & Wed Last of the shortwaves will eventually move east of New England Fri night with ridging moving in for Sat which will bring sunshine and lighter winds but below normal temps. Progressive pattern with next northern stream system moving in Sat night into Sun. Warm frontal overrunning precipitation is expected to overspread SNE Sat night. Ptype mainly rain as the column is warming, but surface temps may be near freezing at the precipitation onset over the Berkshires and Worcester Hills where brief freezing rain possible. But impacts should be minimal as any icing should be localized and brief. Cold front will be moving through SNE Sunday morning and high confidence in improving trend after the frontal passage but exact timing is uncertain. Gusty post-frontal winds develop, most likely in the afternoon, and highs should reach the 50s in the coastal plain. Windy and turning colder Sunday night and Mon. Winds will diminish Tuesday and especially Wednesday as high pressure builds in from the west. Below normal temps through midweek. Marine Forecaster Confidence Levels... Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Through Friday night Light showers will continue through about midnight tonight before slowing and waning Friday morning. Winds remain gusty out of the NW at 20-30 knots tonight through Friday, before subsiding slightly for Friday night into the 10-20 knot range. Seas in the southern waters remain around 4-8 feet, while only 2-5 feet in the eastern waters. Outlook /Saturday through Tuesday/... Saturday: Winds less than 25 kt. Seas locally approaching 5 ft. Saturday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Rain. Sunday: Strong winds with gusts up to 40 kt. Areas of rough seas. Rain likely. Sunday Night: Strong winds with gusts up to 40 kt. Rough seas up to 15 ft. Chance of rain. Monday: Strong winds with gusts up to 35 kt. Rough seas up to 14 ft. Slight chance of rain. Monday Night: Strong winds with gusts up to 35 kt. Rough seas up to 13 ft. Tuesday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. NOAA Boston MA Office: Watches - Warnings - Advisories CT...None. MA...None. RI...None. Marine Small Craft Advisory until 7am EST Friday for ANZ231-251. Small Craft Advisory until 10am EST Friday for ANZ232>235-237. Small Craft Advisory until 7am EST Friday for ANZ250. Small Craft Advisory until 4pm EST Friday for ANZ254>256. |
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