East of Ipswich Bay and the Stellwagen Bank Marine Sanctuary Marine Forecast
| Today...N Winds 5 To 10 Kt, Becoming Nw This Afternoon. Seas 3 To 5 Ft. Wave Detail: Ne 5 Ft At 10 Seconds And N 1 Foot At 3 Seconds. |
| Tonight...Sw Winds 5 To 10 Kt. Seas 3 To 4 Ft. Wave Detail: E 4 Ft At 12 Seconds And Nw 2 Ft At 4 Seconds. |
| Sun...Sw Winds 5 To 10 Kt. Seas 2 To 3 Ft. Wave Detail: E 3 Ft At 13 Seconds. |
| Sun Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft. Wave Detail: S 2 Ft At 3 Seconds And E 2 Ft At 12 Seconds. |
| Mon...W Winds 10 To 15 Kt. Gusts Up To 20 Kt In The Morning. Seas 2 To 3 Ft. Wave Detail: Sw 2 Ft At 3 Seconds And E 2 Ft At 10 Seconds. |
| Mon Night...Nw Winds 10 To 15 Kt, Becoming N 15 To 20 Kt After Midnight. Gusts Up To 25 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 3 Ft At 4 Seconds And E 3 Ft At 9 Seconds. |
| Tue Through Wed...Ne Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 3 To 5 Ft. |
| Wed Night...S Winds 5 To 10 Kt. Seas 2 To 3 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 649am EDT Sat Oct 24 2026 .WHAT HAS CHANGED... No meaningful changes to the forecast, with an extended stretch of quiet and dry weather ahead. .KEY MESSAGES... - Prolonged stretch of dry weather across southern New England. Moderating afternoon temperatures this weekend, though chilly mornings will bring widespread frost away from the immediate coast. KEY MESSAGE 1...Prolonged stretch of dry weather across southern New England. Moderating afternoon temperatures this weekend, though chilly mornings will bring widespread frost away from the immediate coast. If the forecast discussion starts sounding like a broken record over the next several days, you can thank strong high pressure for that! An extended stretch of dry weather is expected, with some day-to-day variability in temperatures, but otherwise not much excitement on the horizon. In fact, global ensembles paint a rather parched picture for southern New England, with cumulative probabilities of measurable precipitation (0.01 inches or greater) generally less than 10 percent through much of next week. An expansive area of surface high pressure, around 1035 mb, remains anchored across the region this weekend, with some guidance suggesting pressures could approach 1040 mb Saturday night. This will promote plenty of sunshine, light winds, and generally quiet conditions. Temperatures at 925 mb warm to +6C to +9C this afternoon, supporting highs in the upper 50s to lower 60s. If this were a few weeks earlier, with a higher sun angle, we'd likely be talking about highs in the middle to upper 60s. But here we are, nearing the end of October! Temperatures aloft continue to moderate Sunday and Monday, with 925 mb temperatures approaching +10C Sunday and +13C Monday. This should support highs in the lower to middle 60s Sunday, with some locations potentially reaching 70F Monday. Overnight temperatures, however, are a different story. Clear skies and light to calm winds beneath strong high pressure will promote efficient radiational cooling. Opted to trend overnight lows below NBM guidance, which typically runs too warm in these setups. Saturday and Sunday mornings, and to some extent Monday morning, will be quite cold, with lows in the 20s to lower 30s and widespread frost away from the immediate coast and urban heat islands. Be sure to protect those mums and Halloween pumpkins! One interesting feature of this setup will be the potential for significant temperature differences between sheltered valleys and higher elevations. With clear skies and light winds promoting strong radiational cooling, colder air will settle into the valleys, while some elevated locations may remain several degrees warmer within the nocturnal temperature inversion. Looking ahead, a moisture-starved cold front approaches from the north-northwest late Monday night into early Tuesday. However, persistent high pressure and dry air will likely limit the front to little more than some additional cloud cover and a cooler air mass. Highs return to the 50s Tuesday and Wednesday before potentially rebounding into the 60s Thursday and Friday. Overnight temperatures should trend closer to seasonable levels, although confidence is lower given uncertainty surrounding cloud cover and winds, both of which could limit radiational cooling. Fingers crossed this dry pattern holds just a little longer and gives us a dry All Hallows' Eve! Marine Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Through Sunday...High confidence. High pressure remains in control, bringing dry weather and generally favorable marine conditions for the next several days. Today, winds will be light and generally from the northwest, with gusts at most 8 to 12 kt, becoming light WSW on Sunday. Despite the lighter winds, seas across the outer waters remain elevated at 4 to 6 ft, warranting a continuation of Small Craft Advisories through this evening for seas rather than winds. Seas subside below 4 ft by Sunday. Outlook /Monday through Wednesday/... Monday: Winds less than 25 kt. Monday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Tuesday: Low risk for Small Craft Advisory winds with gusts up to 20 kt. Seas up to 5 ft. Tuesday Night: Winds less than 25 kt. Seas up to 5 ft. Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. NOAA Boston MA Office: Watches - Warnings - Advisories CT...None. MA...None. RI...None. Marine Small Craft Advisory until 8pm EDT this evening for ANZ250. Small Craft Advisory until 6am EDT Sunday for ANZ254-255. |
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