East of Ipswich Bay and the Stellwagen Bank Marine Sanctuary Marine Forecast
| Tonight...S Winds 5 To 10 Kt. Seas Around 2 Ft. Wave Detail: E 2 Ft At 7 Seconds And S 1 Foot At 3 Seconds. |
| Tue...Ne Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: E 3 Ft At 7 Seconds And S 1 Foot At 3 Seconds. |
| Tue Night...Ne Winds 5 To 10 Kt. Seas 2 To 3 Ft. Wave Detail: Ne 3 Ft At 7 Seconds. Patchy Fog. Vsby 1 Nm Or Less. |
| Wed...Ne Winds Around 10 Kt. Seas 2 To 4 Ft. Wave Detail: E 3 Ft At 9 Seconds. |
| Wed Night And Thu...Se Winds 5 To 10 Kt. Seas 3 To 4 Ft. Wave Detail: E 3 Ft At 8 Seconds. |
| Thu Night...S Winds Around 10 Kt, Becoming Sw After Midnight. Seas Around 3 Ft. Wave Detail: E 3 Ft At 8 Seconds. |
| Fri Through Sat Night...Sw 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. |
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Area Forecast Discussion National Weather Service Boston/Norton MA 235pm EDT Monday August 4 2025 Synopsis Dry weather, seasonable temperatures, and moderate relative humidity expected to continue through the week. Wildfire smoke lingers into Tuesday, but may not be as noticeable. Our next chance for rain may not materialize until next Sunday. Near Term - Through Tonight Key Messages: * Haze from Canadian wildfire smoke. * Another dry and cool night with increasing cloudiness towards sunrise. A large high pressure system continues to sit over Ontario and New England bringing continued dry conditions. Smoke from the Canadian wildfires will continue to affect southern New England's air quality at least through tonight. Expecting relative humidity to rise overnight and increase the cloud cover as we move closer to daybreak. Overnight temperatures in the low to mid 60s. Short Term - Tuesday Through Tuesday Night Key Messages: * Slightly cooler for eastern MA, RI, and Cape. A cold front pushing south into southern New England from Canada will lead to northeast flow Tuesday. Given the prolonged onshore flow, expecting daytime temperatures to be a bit cooler across the eastern half of our region... upper 70s to low 80s. Interior southern New England will likely remain slightly above normal... in the mid 80s or so. There is a chance some of the wildfire smoke lingers through Tuesday, but it may not be as noticeable with the cloudier skies. Long Term - Wednesday Through Monday Key Messages: * Dry conditions expected in most places with the exception of an isolated shower or thunderstorm in western MA Wed/Thu. * Highs in 80s with local sea breezes each day. Trending closer to 90 by end of weekend. Weak ridging with zonal flow aloft with surface high pressure will owe to a mainly dry extended period. Model guidance shows a weak disturbance or two moving through the flow Wednesday and Thursday; however, marginal moisture and a weakly forced environment will keep precipitation chances limited. Ensemble guidance shows a weak signal for precipitation later Wednesday and Thursday mainly across western MA. The environment will favor more isolated showers, perhaps a storm given some marginal instability around as well. High temperatures stay about seasonable with highs in the low to mid 80s through Saturday. Weak winds will lead to localized sea breezes each day which will keep the coastal areas cooler. Temperature trend warmer toward the end of the weekend as an upper ridge builds over the region. Ensemble guidance shows highs leaning closer to mid 80s to around 90. Uncertainty increases into early next week as the ridge aloft weakens. Flow transitions to more southwesterly, advecting in higher amounts of moisture into the region. The main uncertainty will be with respect to development of a tropical system southeast of the Carolina coast. NHC currently shows a 30% chance of cyclone formation with this disturbance. Not much agreement or run to run consistency among deterministic guidance, but some solutions have the system recurving NE later in the weekend toward southern New England. This is VERY far out in these discussed model runs. A lot can change. Take this as little nudge to be aware that this is a possibility further out in the extended forecast and stay tuned for future updates. For the latest on the tropics, refer to the latest Tropical Weather Outlooks issued by the NHC. If nothing else, it serves as a reminder that we are in the midst of tropical cyclone season. Marine Forecaster Confidence Levels... Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Through Tuesday...High confidence. High pressure remains over the waters. A period of relatively light winds and seas with good visibility continues. Outlook /Wednesday through Saturday/... Wednesday through Friday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Saturday: Winds less than 25 kt. Seas locally approaching 5 ft. NOAA Boston MA Office: Watches - Warnings - Advisories CT... Air Quality Alert until 11pm EDT this evening for CTZ002>004. MA... Air Quality Alert until midnight EDT tonight for MAZ002>024- 026. RI... Air Quality Alert until midnight EDT tonight for RIZ001>008. Marine None. |
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