Narragansett Bay Marine Forecast
| Tonight...W Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt After Midnight. Gusts Up To 30 Kt. Waves Around 3 Ft. |
| Tue...W Winds 10 To 15 Kt With Gusts Up To 30 Kt. Waves 2 To 3 Ft. |
| Tue Night...W Winds 5 To 10 Kt. Gusts Up To 20 Kt In The Evening. Waves Around 2 Ft. |
| Wed...Nw Winds Around 5 Kt. Waves 1 Foot Or Less. |
| Wed Night And Thu...Ne Winds Around 5 Kt. Waves 1 Foot Or Less. |
| Thu Night...E Winds Around 5 Kt, Becoming S Around 5 Kt After Midnight. Waves 1 Foot Or Less. |
| Fri Through Sat Night...Nw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Waves 2 To 3 Ft. A Chance Of Rain. 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 1252pm EST Monday Nov 17 2025 Synopsis The windy conditions this afternoon dissipate some tonight and Tuesday, but it still will be blustery and chilly. High pressure builds overhead for Wednesday and Thursday bringing relatively light winds and continued seasonable temperatures. A cold front will bring a period of unsettled weather Friday which may linger into Saturday, then high pressure returns next Sunday. Near Term - Through Tonight Key Messages... * Dry but blustery & chilly tonight * Low temps tonight in the middle 20s to the lower 30s Details... Closed upper level low will continue to lift further north across the Canadian Maritimes. This coupled with the loss of daytime heating will result in wind gusts diminishing some this evening. However...it will remain blustery overnight with NW wind gusts of 15 to 25 mph at times. While winds will not decouple...still expect a chilly night with low temps bottoming out in the middle 20s to the lower 30s across the region. Short Term - Tuesday Through Tuesday Night Key Messages... * Sunny, breezy & seasonable Tuesday but with less wind/tad milder than today...Highs near 40 high terrain with middle-upper 40s elsewhere * Chilly Tuesday night...lows in the 20s to near 30 for most with any precipitation from a fast moving system staying to our south Details... Tuesday... Closed low continues to lift further northwest well into northern Quebec on Tue. As this happens upper level trough will start to lift north and away from the region as well. This should result in sunny skies Tuesday with little if any diurnal CU unlike today. Still some westerly wind gusts of 20-25 mph with a few gusts near 30 mph...but not nearly as windy as the past two days. High temps will also be a tad higher than today. Highs should top out near 40 in the highest terrain...to mainly the middle to upper 40s elsewhere. Tuesday night... Shortwave across the southern Great Lakes will move east towards the mid-Atlantic coast. Upper level confluent flow should keep this system to our south with just a period of some clouds overnight mainly across CT/RI/SE MA. The 12z HRRR (High-Resolution Rapid Refresh) is an outlier which brings some very light precipitation in our far southern areas late Tuesday night. Given the other guidance is south and the atmosphere is quite dry will not include any precipitation in the forecast at this time. Low temperatures should drop into the 20s to near 30 across the region. Long Term - Wednesday Through Sunday Key Messages: * Dry with less wind Wednesday and Thursday. Cooler than normal. * Scattered showers Friday into early Saturday. Cooler for weekend. Details... By Wednesday the upper level pattern transitions to more quasi-zonal flow. A southerly wave will exit offshore early in the morning, more likely staying well enough south to keep it dry. There is good agreement across model guidance for a surface high to slide across the region Wednesday which will owe to dry conditions and lighter winds on Wednesday. It will still lean on the cooler side with highs a little below normal in the low to mid 40s with a some upper 40s possible in CT Valley and south coast. Similar conditions are expected on Thursday. A weak shortwave trough moves through the zonal flow; however, both deterministic and ensemble guidance shows this wave to be fairly moisture-starved. This will likely keep things dry, but perhaps bring some additional cloud cover for the day. Ensemble guidance continues to agree on a northern stream shortwave trough tracking to the north of the region Fri-Sat. Although the stronger synoptic forcing is further north, there is a consensus that there will be broad weak ascent for SNE. Coupled with a plume of above normal moisture, this will support showers across the region mainly Fri into early Sat. Global models and ensemble solutions begin to diverge when it comes to the details, particularly with respect to the evolution of a secondary low and track. This may bring more widespread rainfall if the low tracks closeby. Can't rule out some flakes mixing in briefly for the high terrain very early Sat AM. Otherwise, this is appearing to likely be a low Quantitative Precipitation Forecast rain. Weak WAA (Warm Air Advection - the movement of warm air) ahead of the wave will bring temperatures to around normal on Friday in the low 50s. A cold front should move across Saturday, but speed is less certain and may depend on how the southerly wave tracks. Overall this should trend highs cooler Saturday with conditions clearing into the afternoon. Cool and dry conditions for Sunday. Looking even further ahead into the following (holiday) week, pattern looks overall benign with no strong signal for an impactful system to impact southern New England. It's still plenty far away, so continue to monitor the forecast for updates. Marine Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. This afternoon through Tuesday night... Strong pressure gradient with good mixing over the waters were yield W wind gusts of 30 to 40 knots this afternoon. As upper level low continues to lift northward across the the Maritimes wind gusts will diminish some tonight. We should be able to gradually transition Gales to small craft headlines this evening into the overnight hours. Still enough of a gradient to result in W wind gusts of 20 to 30 knots on Tuesday and will need small craft advisories for all waters. A weak ridge of high pressure builds in for Tuesday night allowing winds/seas to finally diminish below small craft advisory thresholds. Outlook /Wednesday through Friday/... Tuesday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Wednesday through Thursday: Winds less than 25 kt. Thursday Night: Winds less than 25 kt. Slight chance of rain. Friday: Winds less than 25 kt. Chance of rain. NOAA Boston MA Office: Watches - Warnings - Advisories CT...None. MA...None. RI...None. Marine Gale Warning until 7pm EST this evening for ANZ230>237-251. Gale Warning until 1am EST Tuesday for ANZ250-254>256. |
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