Montauk NY to Marthas Vineyard out 20 NM South of Block Island Marine Forecast
| Tonight...Nw Winds 25 To 30 Kt, Diminishing To 20 To 25 Kt After Midnight. Seas 5 To 7 Ft. Wave Detail: Sw 6 Ft At 8 Seconds And Nw 5 Ft At 5 Seconds. A Slight Chance Of Rain. |
| Fri...Nw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 4 To 6 Ft. Wave Detail: W 4 Ft At 6 Seconds And Se 1 Foot At 9 Seconds. |
| Fri Night...Nw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 3 To 4 Ft. Wave Detail: N 4 Ft At 5 Seconds And Sw 1 Foot At 7 Seconds. |
| Sat...Nw Winds 15 To 20 Kt, Becoming W 10 To 15 Kt In The Afternoon. Seas 2 To 4 Ft. Wave Detail: N 3 Ft At 4 Seconds And Sw 1 Foot At 6 Seconds. |
| Sat Night...Sw Winds 15 To 20 Kt, Increasing To 20 To 25 Kt With Gusts Up To 30 Kt After Midnight. Seas 2 To 4 Ft, Building To 4 To 6 Ft After Midnight. Wave Detail: Sw 3 Ft At 4 Seconds, Becoming Sw 6 Ft At 5 Seconds And E 1 Foot At 15 Seconds. Rain. |
| Sun...W Winds 25 To 35 Kt. Seas 6 To 9 Ft. Wave Detail: W 8 Ft At 6 Seconds And E 1 Foot At 14 Seconds. Rain, Mainly In The Morning. |
| Sun Night...W Winds 30 To 40 Kt With Gusts Up To 45 Kt. Seas 9 To 13 Ft. A Chance Of Rain. |
| Mon...W Winds 25 To 35 Kt With Gusts Up To 40 Kt. Seas 9 To 13 Ft. |
| Mon Night...Nw Winds 25 To 30 Kt With Gusts Up To 35 Kt. Seas 7 To 10 Ft. |
| Tue...W Winds 20 To 25 Kt. Seas 4 To 6 Ft. |
| Tue Night...Nw Winds 10 To 15 Kt With Gusts Up To 20 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 300pm 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 - Until 6am Friday Morning 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 - 6am Friday Morning 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 start to Saturday, rain returns late Saturday evening with a few pockets of freezing rain possible at the onset. * Breezy, showers, and seasonable Sunday. * No significant weather on the horizon, daily chance for a light rain shower or flurry Monday through Wednesday, with below normal temperatures through the period. Dry conditions Saturday (during the daylight hours) as transient high pressure slides through New England. Our next system arrives late Saturday afternoon or early evening as the weak mid-level ridge flattens out with the approach of a 500mb closed low. There is still uncertainty with exact arrival time of the mid-level shortwave and developing low pressure system, though there is confidence we get through the daylight hours dry. Arrival of the system coincides with a modest low-level jet from the south and WAA, non-diurnal trend in temperatures overnight and gusty southwest wind from the 925mb jet of 30 to 40 knots. But, at the onset there is cold air at the ground level and antecedent surface temperatures might lead to pockets of freezing rain, mainly areas at or above 1,500 feet in the northern Berkshires. DESI probabilities show less than 10% chance of 0.01" of freezing rain. Otherwise, steady rain overnight. By Sunday morning temperatures reach the upper 40s to 50F, exception are the higher elevations where temperatures start off in the upper 30s. Rain wraps up late Sunday morning to early afternoon, warm sector brings seasonable temperatures despite cloud cover and periodic afternoon showers. Early to middle part of next week is dominated by a mid-level closed low over northern New England and cyclonic flow. Weak shortwaves and areas of low pressure pivot about, leading to daily hit-and-miss showers (sprinkles or flurries) and diurnal cloud cover. As for temperatures, trend calls for below normal daytime highs and overnight lows during this time frame. 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. |
Boston MA Radar
Northeast Radar
East Coast Satellite