Marine Weather Net

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


5 - 10


15 - 20


10 - 15



The Marine Weather Forecast In Detail:
ANZ454 Forecast Issued: 402 AM EST Thu Feb 09 2023

Today...Se Winds 5 To 10 Kt, Becoming S 10 To 15 Kt With Gusts Up To 20 Kt Late This Morning And Afternoon. Seas 3 To 5 Ft. E Swell 2 To 3 Ft At 7 Seconds, Becoming S At 3 Seconds This Afternoon. A Slight Chance Of Showers Late.
Tonight...S Winds 15 To 20 Kt With Gusts Up To 30 Kt. Seas 4 To 5 Ft. S Swell 2 To 4 Ft At 5 Seconds.
Fri...W Winds 10 To 15 Kt, Becoming Nw 5 To 10 Kt In The Afternoon. Seas 3 To 5 Ft. S Swell 2 To 4 Ft At 5 Seconds.
Fri Night...Nw Winds Around 5 Kt, Increasing To 10 To 15 Kt After Midnight. Seas 2 To 3 Ft. S Swell Around 2 Ft At 7 Seconds. A Chance Of Rain.
Sat...Nw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 2 To 3 Ft. N Swell 2 To 3 Ft At 3 Seconds.
Sat Night...Ne Winds 5 To 10 Kt. Seas 2 To 4 Ft. E Swell Around 2 Ft At 7 Seconds, Becoming Ne At 3 Seconds After Midnight. A Chance Of Rain After Midnight.
Sun...Ne Winds 15 To 20 Kt, Increasing To 20 To 25 Kt. Seas 3 To 4 Ft, Building To 5 To 8 Ft. Rain Likely .
Mon...N Winds 20 To 25 Kt, Becoming Nw 15 To 20 Kt In The Afternoon, Then Becoming W Around 10 Kt. Seas 6 To 9 Ft, Subsiding To 5 To 7 Ft.
SHARE THIS PAGE:           
Area Forecast Discussion
National Weather Service Mount Holly NJ
336am EST Thu Feb 9 2023

High pressure offshore will continue to move east today. Meanwhile, low pressure will move across the Great Lakes and then down the St. Lawrence Valley later today through Friday. Its associated fronts will affect our weather through Friday. More high pressure arrives for Saturday, but this will be followed by another low for Sunday. High pressure returns for the first part of next week.

Near Term - Through Tonight
A mid level ridge was continuing to influence much of the eastern United States early this morning. The axis of the ridge is forecast to pass overhead late this morning.

A surface warm front is expected to lift northward through our region this afternoon, with a cold front following from the west toward daybreak on Friday.

A area of mid level clouds was approaching from the west and southwest around 3:00 AM. Areas of radiation fog had developed from southern Ocean County down to northern Cape May County. The fog may persist until after daybreak in that vicinity. However, we do not expect it to expand much more as the high and mid level clouds continue to increase and thicken, causing temperatures to begin creeping upward.

An area of light rain showers passing to our northwest is anticipated to swipe across Berks County, the Lehigh Valley, the Poconos and northwestern New Jersey during the morning and early afternoon hours. Temperatures may be cold enough at the onset to create some localized freezing rain. The extent and duration of any freezing rain should be limited, so its impact does not appear to warrant an advisory.

The sky is forecast to be mostly cloudy for today. A light east wind is expected to veer toward the southeast and south as the warm front approaches and passes. The strongest of the warm advection will likely be this afternoon. Maximum temperatures during the afternoon hours should range from the middle and upper 40s in the elevated terrain of the Poconos and northern New Jersey to the middle 60s in southern Delaware.

Variable cloud cover is anticipated for tonight as the cold front moves toward and into our region. A south to southwest wind around 10 to 15 MPH is expected to become west after the boundary passes. Wind gusts of 20 to 30 MPH are likely.

Short Term - Friday Through Saturday Night
The low pressure system will have moved north of the area and its associated cold front will cross the area early Friday. Rains will end from W to E thru the pre-dawn as drier air deepens across the area. Colder air arrives later Friday, so high temps will still be mostly in the 50s, but temperatures will drop into the 20s for the NW areas Friday night while other regions have lows in the 30s.

Saturday looks fair at this time, but the front that crossed the area Friday will be just south of the area and some clouds and rains may affect the Delmarva areas Sat night as a weak wave moves along the front. probability of precipitation are in the chance range for Sat night as this weak low moves by. Highs Sat will range from the low 40s N/W to the mid 40s for the Philly metro area and Delmarva.

Long Term - Sunday Through Wednesday
For Sunday and Sunday night, a coastal low pressure system will affect much of the region with clouds and rain for most areas. Some snow is possible at the onset for the NW most areas but as temperatures warm to near 40, the precipitation should change to rain. The low pressure will be slowly strengthening, as it moves offshore to our S/E, but the effects of the winds will develop once the low passes by with the gusts developing later Sunday and lasting into Monday. As we closer to the event, we'll determine with Coastal Flooding or winds warrant any flags being issues. Highs Sunday will mostly be in the 40s. This will probably be the coldest day of the long term.

For next week, the coastal system will pull away Monday and it will be replaced by high pressure which will linger into Tuesday. A continuation of above normal temperatures with highs in the 50s both Mon/Tuesday and lows for the most part in the 30s. Later Tuesday and into Wed, another low pressure area will affect the region with a shield of rain and mild temperatures.

A southeast wind is forecast to increase to around 15 knots today, before veering to the south. A southerly wind around 20 knots this evening should become southwest late tonight. Wind gusts are expected to increase into the 25 to 30 knot range. As a result, a Small Craft Advisory begins on our ocean waters and on Delaware Bay at 5:00 PM.

Wave heigheights are anticipated to build to 4 to 6 feet on our ocean waters, and to 2 to 3 feet on Delaware Bay.

Outlook... Fri...SCA (Small Craft Advisory) conditions diminish thru the day. Fair.

Fri night thru Sat... sub-SCA (Small Craft Advisory) expected. Fair.

Sat night/Sunday morning...sub-SCA (Small Craft Advisory) with rain developing.

Sunday afternoon thru Sunday night...Rain. Gales probable.

Monday...Gales diminishing back to SCA. Sct morning showers possible.

NOAA Mount Holly NJ Office: Watches - Warnings - Advisories
PA...None. NJ...None. DE...None. MD...None.

Small Craft Advisory from 5pm this afternoon to 4am EST Friday for ANZ430-431. Small Craft Advisory from 5pm this afternoon to 11am EST Friday for ANZ450>452. Small Craft Advisory from 5pm this afternoon to 7am EST Friday for ANZ453>455.