Marine Weather Net

Cape May NJ to Cape Henlopen DE out 20 nm Marine Forecast


10 - 15


10 - 15


5 - 10



The Marine Weather Forecast In Detail:
ANZ454 Forecast Issued: 103 AM EDT Thu Aug 05 2021

Rest Of Tonight...N Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 3 To 5 Ft. A Slight Chance Of Showers. Swell Mainly From The Se With A Dominant Period Of 8 Seconds.
Thu...N Winds 10 To 15 Kt With Gusts Up To 20 Kt, Becoming Ne 5 To 10 Kt In The Afternoon. Seas 4 To 6 Ft. Swell Mainly From The Se With A Dominant Period Of 7 Seconds.
Thu Night...S Winds 5 To 10 Kt, Becoming Sw After Midnight. Seas 3 To 5 Ft. Patchy Fog Late With Vsby 1 To 3 Nm. Swell Mainly From The Se With A Dominant Period Of 8 Seconds.
Fri...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas 3 To 4 Ft. Swell Mainly From The Se With A Dominant Period Of 7 Seconds.
Fri Night...S Winds 5 To 10 Kt. Seas Around 3 Ft.
Sat...S Winds 5 To 10 Kt. Seas Around 3 Ft. A Chance Of Tstms In The Afternoon. Light Swell In The Morning.
Sat Night...Sw Winds 5 To 10 Kt. Seas Around 3 Ft. A Chance Of Tstms.
Sun...W Winds Around 5 Kt, Becoming S In The Afternoon. Seas Around 3 Ft.
Sun Night...S Winds 5 To 10 Kt. Seas Around 3 Ft.
Mon...S Winds Around 5 Kt, Increasing To Around 10 Kt In The Afternoon. Seas 2 Ft Or Less, Then Around 3 Ft In The Afternoon.
Mon Night...S Winds Around 10 Kt With Gusts Up To 20 Kt. Seas Around 3 Ft. Winds And Seas Higher In And Near Tstms.
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Area Forecast Discussion
National Weather Service Mount Holly NJ
933pm EDT Wednesday August 4 2021

The front which has been nearly stationary off our coast the last two days will drift northwest as it dissipates. High pressure will build over our region through the end of the week. A weak cold front may approach the region Sunday night. A trough may move over the region mid week next week.

Near Term - Through Thursday
Showers have thus far stayed mostly off shore. Although the front should drift northwest overnight, it should also be weakening at the same time, so the window of potential for showers along the coast is shrinking. Given current trends, have decreased Probability of Precipitation for most locations, except the immediate coast.

By tomorrow, expect the front to be mostly dissipated, and along with it, any showers near our region. Additionally, the upper level jet which has been responsible for persistent high clouds since yesterday will shift east, resulting in clearing skies. The clearing skies will allow for a modest warming trend into tomorrow, with highs mostly in the 80s across the region (70s forecast for the southern Poconos and immediate coast).

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/... A weak warm front may lift through the region late in the week as low level southerly return flow develops. Consequently, the main story through this period will be warmer and humid conditions returning to the region. An approaching mid level short wave trough could result in some showers and thunderstorms during the day on Saturday, but otherwise, don't expect any precipitation chances through this period.

Highs both Friday and Saturday should be in the upper 80s to near 90 for much of the region (with the exception of the immediate coast and the southern Poconos which may see highs in the lower 80s). Although temperatures may be a degree or two lower on Saturday as compared to Friday thanks to the increasing cloud cover with the approaching trough, it won't feel much better as by Saturday dew points could be nudging into the upper 60s and lower 70s.

Long Term - Saturday Night Through Wednesday
If you are a fan of summer, then have no fear. Summer makes a return to our area over the weekend and into early next week.

The upper trough swings offshore by late Saturday night which should lead to some ridging across the Mid-Atlantic. At the surface, Bermuda high pressure sets up shop and puts us into a more summer- like regime. With southwest flow at the surface and up through the lower levels of the atmosphere, we will see both an increase in temperatures and dew points, leading to a bit more steamy airmass across the region. 850mb temps will rise into the upper teens to around 20 C through the first half of the week. This will translate into high temperatures back into lower 90s with some spots near or into the mid 90s by midweek. The kicker will be that the dew points will rise back into the lower to mid 70s as we progress through the week and this may allow for heat index values in the upper 90s to lower 100s for Monday through Wednesday. Heat headlines may be needed so this time frame will need to be closely monitored.

With any good potential heat wave, we will also will see the typically occurrence of diurnally driven showers and thunderstorms each day, but moreso towards midweek as a trough sets up across the region and instability increases.

SCA (Small Craft Advisory) conditions, primarily for elevated seas are expected to continue through most, if not all, of Thursday. Winds are expected to become light and shift to southeasterly during the day on Thursday.

On the Delaware Bay, winds and waves should stay below SCA (Small Craft Advisory) criteria.

Outlook... Thursday night through Monday...Once seas drop below 5 ft (if they haven't already by Thursday evening) winds and seas should stay below SCA (Small Craft Advisory) criteria.

Rip Currents... A moderate risk for the formation of dangerous rip currents is expected to continue through Thursday due to elevated wave heigheights and some onshore flow. By Friday, winds should shift to S/SE which will continue to bring an onshore component to the NJ coast but not as much for DE. As a result, we'll carry a moderate risk for rip currents for the NJ shore for Friday with a low risk for the DE shore.

NOAA Mount Holly NJ Office: Watches - Warnings - Advisories
PA...None. NJ...None. DE...None. MD...None.
Small Craft Advisory until 6pm EDT Thursday for ANZ450>455.