Delaware Bay south of East Point NJ to Slaughter Beach DE Marine Forecast
| Today...Ne Winds 10 To 15 Kt. Seas 2 To 3 Ft. Wave Detail: Ne 3 Ft At 5 Seconds And Se 2 Ft At 15 Seconds. |
| Tonight...Ne Winds 15 To 20 Kt, Increasing To 20 To 25 Kt After Midnight. Seas 3 To 5 Ft. Wave Detail: Ne 5 Ft At 5 Seconds And Se 2 Ft At 15 Seconds. |
| Wed...Ne Winds 20 To 25 Kt, Diminishing To 15 To 20 Kt In The Afternoon. Seas 3 To 5 Ft. Wave Detail: Ne 5 Ft At 5 Seconds And Se 3 Ft At 14 Seconds. |
| Wed Night...Ne Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 3 To 5 Ft. Wave Detail: Ne 4 Ft At 5 Seconds And Se 4 Ft At 13 Seconds. |
| Thu...Ne Winds Around 15 Kt With Gusts Up To 25 Kt. Seas 3 To 5 Ft. Wave Detail: Ne 3 Ft At 4 Seconds And Se 3 Ft At 11 Seconds. |
| Thu Night...E Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas 2 To 4 Ft. Wave Detail: Ne 3 Ft At 4 Seconds And Se 3 Ft At 11 Seconds. |
| Fri...Ne Winds Around 5 Kt, Becoming Se In The Afternoon. Seas 2 To 4 Ft. |
| Fri Night...S Winds Around 5 Kt. Seas 2 To 3 Ft. |
| Sat...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 2 Ft. |
| Sat Night...Sw Winds 5 To 10 Kt. Seas Around 2 Ft. |
| Area Forecast Discussion National Weather Service Mount Holly NJ 217pm EDT Tuesday September 30 2025 Synopsis A cold front will move through the region tonight, with strong high pressure building south into the region and remaining in place through the weekend and into early next week. Several tropical systems over the western Atlantic ocean will remain away from the Mid- Atlantic coast. Near Term - Through Wednesday Our area is currently under fairly weak flow aloft, with Hurricanes Humberto and Imelda over the Western Atlantic basin to our southeast, a ridge axis across central portions of the country, and the polar jet dipping southward into far northern New England. With time, the ridge over the central tier of the US will expand eastward into the area, becoming the dominant feature. At the surface, a cold front to the north of the area will move through the region tonight. Strong high pressure centered over portions of Ontario will expand southward into the area thereafter. Widespread cloudiness from Imelda's cirrus shield is prevalent across the area, though there has been some thinning noted on visible imagery. With very limited moisture, the approaching cold front is not expected to trigger any showers. However, it will bring clearing skies and notably cooler temperatures with its passage. Lows tonight will generally range from near 50 across eastern PA and northern NJ to the upper 50s to near 60 across southern NJ and the Delmarva. Across the higher elevations of the Poconos and far northern NJ, temperatures should fall into the 40s. High temperatures on Wednesday will be in the upper 60s to near 70 areawide, with mostly clear skies. With high pressure building to the north and the hurricanes to our southeast, a tight pressure gradient will begin to take shape across the area tonight and during the day on Wednesday. It will be somewhat breezy across the entire area, with gusts to around 25 mph possible beginning late tonight. Near the coast, however, this pattern will favor wind gusts perhaps to near 40 mph. Winds should begin to taper off some by late afternoon or early evening. Short Term - Wednesday Night Through Friday Surface high pressure centered over southern Quebec on Wednesday night will build south over New England on Thursday, then towards New York City Thursday night and finally end up over the Atlantic east of New Jersey on Friday. Aloft, an upper level ridge centered over Indiana Wednesday night will shift southeastward towards Cincinatti Thursday, towards West Virginia Thursday night, and into Virginia Friday, weakening gradually as it does so. There will be a couple of very weak impulses passing over the ridge and into our region Thursday into Friday, bringing some high clouds, but that's all. Otherwise, the cooler Canadian surface high will promote dry weather with partly to mostly clear skies and temps just a bit below normal. Radiational cooling versus advection will determine what the coolest night is at various locales, with sites that get coldest with advection (urban areas) more likely to be coolest Wednesday night when we still have a breeze, but areas which chill best with radiational cooling (rural locales) likely to be coldest Thursday night. Patchy frost may occur in the coldest spots of our northwestern zones (Poconos/NW NJ), but otherwise, nothing to write home about as it will only be slightly cooler than our coldest night so far this side of the summer solstice, which was nearly a month ago. Highs will be on the cooler side, with 60s in most areas Thursday and creeping up a few degrees closer to 70 on Friday. Long Term - Friday Night Through Tuesday Surface high pressure likely settles just southeast of our region for Saturday, lingering Sunday and Monday before starting to be pushed eastward Tuesday as surface fronts start to approach from the west. Aloft, upper ridge will remain in overall control Saturday, actually strengthen somewhat Sunday as it relocates to near Cape Hatteras, then starts to weaken a bit Monday and losing more strength to oncoming shortwaves to the northwest on Tuesday. Sensible weather-wise, this means mostly continued dry, with the chance of rain only starting to creep back up from zero on Tuesday. It also means partly to mostly clear skies with gradually warming temps as the air mass continues moderating. Highs rise slowly towards 80 through Monday, then level off due to increasing clouds Tuesday, while lows will slowly return to the 50s for most, with 60s in the warmer spots by Monday night. Marine Confidence remains high in gale force winds in frequent gusts beginning this evening and continuing into Wednesday afternoon. Based on guidance this afternoon, have upgraded the marine zone north of Manasquan Inlet to a Gale Warning, and therefore all ocean zones now have a Gale warning from 6pm today through 6 PM Wednesday. Gusts near 40 kt are expected. For the Delaware Bay, gusts near 30 kt are anticipated a small craft advisory in place. Seas across the ocean zones around 4-6 feet initially will grow to 7- 11 feet during the day Wednesday. Outlook... Gales dwindle early Wednesday night, but SCA (Small Craft Advisory) winds linger into Thursday. For the ocean waters, SCA (Small Craft Advisory) wave heigheights likely continue through Friday. Sub-SCA (Small Craft Advisory) conditions likely over the weekend. Rip Currents... A high risk of rip currents is likely to continue through the remainder of the week. However, the surf program ends today. No further surf forecasts or rip current statements will be issued until May 2026. Tides / Coastal Flooding Strengthening northeast winds through later today into Wednesday will lead to a piling up of water along the ocean front, back bays, and the Delaware Bay. Widespread minor coastal flooding will develop for these areas with the Wednesday afternoon and evening high tide cycle. Tidal flooding is not expected along the Chesapeake Bay for the eastern MD zones. NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...None. NJ...High Risk for Rip Currents until 7pm EDT this evening for NJZ014- 024>026. DE...High Risk for Rip Currents until 7pm EDT this evening for DEZ004. MD...None. Marine Small Craft Advisory from 11pm this evening to 6pm EDT Wednesday for ANZ430. Small Craft Advisory from 6pm this evening to 6pm EDT Thursday for ANZ431. Small Craft Advisory until 6pm EDT this evening for ANZ450>455. Gale Warning from 6pm this evening to 6pm EDT Wednesday for ANZ450>455. |
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