Delaware Bay north of East Point NJ to Slaughter Beach DE Marine Forecast
| Tonight...E Winds 15 To 20 Kt With Gusts Up To 25 Kt, Becoming Se 5 To 10 Kt Late This Evening And Early Morning, Then Becoming N 10 To 15 Kt Late. Seas 3 To 5 Ft, Subsiding To 2 To 3 Ft After Midnight. Wave Detail: Se 4 Ft At 8 Seconds, Becoming Se 3 Ft At 9 Seconds. A Chance Of Showers And Tstms Until Early Morning, Then Showers Likely With A Slight Chance Of Tstms Late. |
| Mon...N Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Ne 3 Ft At 9 Seconds And N 2 Ft At 3 Seconds. Showers Likely In The Morning. |
| Mon Night...Nw Winds 5 To 10 Kt. Seas Around 2 Ft. Wave Detail: Se 2 Ft At 8 Seconds And Nw 1 Foot At 3 Seconds. |
| Tue...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas 1 Foot Or Less. Wave Detail: Se 1 Foot At 8 Seconds. |
| Tue Night...Sw Winds 10 To 15 Kt. Seas 1 Foot Or Less. Wave Detail: S 1 Foot At 3 Seconds. |
| Wed...W Winds 5 To 10 Kt. Seas 1 Foot Or Less. Wave Detail: Sw 1 Foot At 3 Seconds. |
| Wed Night...W Winds 5 To 10 Kt, Becoming N After Midnight. Seas 1 Foot Or Less. |
| Thu...N Winds 10 To 15 Kt, Becoming Ne 5 To 10 Kt In The Afternoon. Seas 1 Foot Or Less. |
| Thu Night...E Winds 5 To 10 Kt. Seas 1 Foot Or Less. A Chance Of Showers After Midnight. |
| Fri...Se Winds 10 To 15 Kt, Becoming Sw 15 To 20 Kt In The Afternoon. Seas 1 Foot Or Less In The Morning. A Chance Of Showers. |
| Fri Night...W Winds 25 To 30 Kt. A Chance Of Showers. Winds And Seas Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Mount Holly NJ 529pm EDT Sunday Oct 11 2026 .WHAT HAS CHANGED... A Coastal Flood Advisory for Monday morning's high tide has been issued for much of the Atlantic coast of New Jersey and Delaware as well as a portion of the Delaware Bay coast. .KEY MESSAGES... 1. The remnants of Isaias will continue to bring rains and a few thunderstorms to the region overnight. 2. Widespread minor tidal flooding expected Monday morning for much of the Atlantic Ocean coasts in New Jersey and Delaware. 3. Increasing temperatures and humid conditions through midweek with some shower chances. The pattern becomes more active towards the end of the week and into the start of the weekend. By the weekend, temperatures get much cooler. KEY MESSAGE 1...The remnants of Isaias will continue to bring rains and a few thunderstorms to the region overnight. A low pressure system which was formerly Isaias is slowly weakening while moving NE across the western NC/VA areas this afternoon and it will continue NE across the Middle Atlantic areas overnight. The first large area of rains ahead of the system is moving NE across the PA/NJ areas while a back edge of steady rains is trailing across eastern MD/DE. Scattered showers in this area will fill in after sunset as more dynamics arrive and limited instability develops too. While there is a chance for a few TSTMs across the area this evening, most spots will not have one. Delmarva and south NJ are the areas most likely to have some thunder. Winds will continue to be East or Northeast for most areas today and tonight. As the low moves by late tonight winds could turn South across SE Delaware near where the low passes by. A soaking rain has already occurred, but more overnight will bring storm total rains up into the 1 to 2 inch range for most areas. The rains (so far) have occurred at a rate which has limited any significant flooding and we expect that this will be the case overnight too. Limited ponding on roads and other minor flooding can be expected however. WPC has maintained most of the region in a Marginal Risk (level 1 out of 4) for excessive rainfall into tonight, which means isolated instances of flash flooding will be possible. After the rains end tonight, we can expect a continuation of low clouds and fog thru dawn. Lower VSBYS in fog may cause some travel concerns for the morning commute. KEY MESSAGE 2...Widespread minor tidal flooding expected Monday morning for much of the Atlantic Ocean coasts in New Jersey and Delaware. While we will be moving away from the New Moon, and winds will begin to turn with the passage of the remnant low, tidal levels will remain elevated Monday morning as winds will remain shore parallel in many locations. This will trap water along the coast, and particularly in the back bays, resulting in a round of widespread minor tidal flooding across most of the Atlantic Ocean coast in New Jersey and Delaware as well as along the Delaware Bay shore in Kent County, Delaware. Spotty minor tidal flooding is also possible Monday morning along the remainder of the Delaware Bay coasts, the tidal Delaware River, the Raritan Bay coast, and the Atlantic Ocean coast in Monmouth County. No tidal flooding concerns expected along the Chesapeake Bay. KEY MESSAGE 3...Increasing temperatures and humid conditions through midweek with some shower chances. The pattern becomes more active towards the end of the week and into the start of the weekend. By the weekend, temperatures get much cooler. An expansive mid and upper-level ridge well to our south will keep the flow more zonal through much of this coming week. There will be multiple pieces of upper-level energy moving through the region along with a cold front leading to some shower chances this week. A cold front sinks south into the area Tuesday night and into Wednesday as a mid-level shortwave also moves through the region. This may lead to some isolated showers Tuesday evening into Tuesday night. However, any precipitation currently looks limited. The cold front may not fully clear our area until later in the day Wednesday. Additional isolated showers are possible Wednesday evening into Wednesday night as more upper-level energy moves through the region. By Thursday, it is drier as high pressure builds in. In terms of temperatures, on Tuesday highs reach the 70s for many with humid conditions. On Wednesday, highs mainly reach the mid 70s to mid 80s with humid conditions continuing. Behind the cold front, highs on Thursday are in the 60s for most with lower humidity values. By Thursday night, the upper-level pattern begins to become more amplified. An upper-level trough approaches the region from the west for the end of the week and moves into the Northeast this weekend. There is a large amount of variation among model guidance given this being towards the end of the long term period. As of right now, at the surface, a deepening low pressure system in Canada will continue to move eastward as it strengthens. This low pressure system currently looks to bring rain to the area during the time period of Thursday night through Friday night. A strong cold front looks to move through sometime Friday leading to much cooler conditions this weekend. Right now, highs on Friday are mainly in the low 60s to low 70s. Over the weekend, forecast highs are mainly in the 50s. It will also be a windy period due to the deepening low to the north and an expansive high building in from the west leading to a tight pressure gradient across the region. Marine Poor conditions continue into early Monday with widespread rains and a small chance for a TSTM. Areas of fog will be common too. SCA (Small Craft Advisory) conditions predominate thru the period but a couple low-end Gale gusts could occur too. Winds across Delaware Bay will probably become sub-SCA (Small Craft Advisory) later this evening but we'll leave the current expiration time (10PM) alone for now and monitor. Outlook... Tuesday through Thursday...No marine hazards expected. Friday...SCA (Small Craft Advisory) conditions probable with increasing SouthWest winds of 25-30 kts and seas building to 5-7 feet. NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...None. NJ...Coastal Flood Advisory from 8am to 2pm EDT Monday for NJZ020- 022>027. DE...Coastal Flood Advisory from 8am to 2pm EDT Monday for DEZ002>004. MD...None. Marine Small Craft Advisory until 10pm EDT this evening for ANZ430- 431. Small Craft Advisory until 4am EDT Tuesday for ANZ450>452. Small Craft Advisory until 2am EDT Tuesday for ANZ453>455. |
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