Little Egg Inlet to Great Egg Inlet NJ out 20 NM Marine Forecast
| Tonight...S Winds 5 To 10 Kt, Becoming Sw Late. Seas 2 To 3 Ft. Wave Detail: Se 3 Ft At 7 Seconds. |
| Tue...Sw Winds 5 To 10 Kt, Increasing To 15 To 20 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: Sw 3 Ft At 4 Seconds And E 2 Ft At 7 Seconds. |
| Tue Night...Sw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 3 To 4 Ft. Wave Detail: S 4 Ft At 5 Seconds And Se 2 Ft At 9 Seconds. |
| Wed...W Winds 15 To 20 Kt, Becoming Sw 10 To 15 Kt In The Afternoon. Seas 3 To 4 Ft. Wave Detail: Sw 3 Ft At 5 Seconds And Se 1 Foot At 9 Seconds. |
| Wed Night...Sw Winds 15 To 20 Kt, Becoming Nw 10 To 15 Kt After Midnight. Seas 2 To 3 Ft. Wave Detail: S 3 Ft At 5 Seconds And Se 1 Foot At 9 Seconds. |
| Thu...Nw Winds Around 5 Kt, Becoming Sw 10 To 15 Kt With Gusts Up To 20 Kt In The Afternoon. Seas 2 To 3 Ft. Wave Detail: S 2 Ft At 5 Seconds And Se 1 Foot At 9 Seconds. |
| Thu Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt, Becoming Nw 5 To 10 Kt After Midnight. Seas 2 To 3 Ft. |
| Fri...N Winds 5 To 10 Kt, Becoming S 10 To 15 Kt In The Afternoon. Seas Around 2 Ft. |
| Fri Night...Sw Winds 10 To 15 Kt. Seas 2 To 3 Ft. |
| Sat...S Winds 10 To 15 Kt. Seas Around 2 Ft. A Chance Of Showers In The Afternoon. |
| Sat Night...S Winds 15 To 20 Kt, Becoming Sw 10 To 15 Kt After Midnight. Seas 3 To 5 Ft. A Chance Of Showers And Tstms. Winds And Seas Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Mount Holly NJ 704pm EDT Monday July 13 2026 .WHAT HAS CHANGED... The Extreme Heat Watch for Wednesday was expanded to include the MD eastern shore as well as Somerset, Middlesex, western Monmouth, Ocean, and southeast Burlington Counties in NJ. All remaining forecast zones except for the Delaware Beaches are now under a Heat Advisory for Wednesday. .KEY MESSAGES... 1. Above normal temperatures take over by Tuesday, likely continuing through the end of the week. Wednesday will be the hottest day of the stretch with Extreme Heat Watches and Heat Advisories in effect for most of our forecast area. 2. Next weekend could be active and unsettled with chances for showers and thunderstorms each day. Some storms could be severe and also may produce heavy rainfall leading to flash flooding. 3. Spotty minor coastal flooding will be possible with tonight's high tide. KEY MESSAGE 1..Above normal temperatures take over by Tuesday, likely continuing through the end of the week. Wednesday will be the hottest day of the stretch with Extreme Heat Watches and Heat Advisories in effect for most of our forecast area. Heat starts to build over the area Tuesday as an upper level area of high pressure over the central part of the country expands eastward towards the east coast. This will occur as a low pressure system moves through eastern Canada pushing a warm front through the area. Highs Tuesday will generally range from the upper 80s to the mid 90s but the dew points and humidity will only be in the moderate range so conditions are expected to stay below heat advisory or warning levels. However Wednesday will be a different story as the heat continues to build over the area. temperatures should get well into the 90s with increasing humidity. Its not out of the question PHL and a few other sites tag the century mark again, but nothing like we saw to start July. Humidity will be less as well. However, heat index values are still projected to get near 105F or even higher, potentially to around 110 over portions of the MD eastern shore near the Chesapeake Bay. A dry cold front looks to pass sometime late Wednesday which will knock down temperatures a bit, but medium range guidance and ensembles indicate above normal temperatures with highs ranging from the upper 80s into the low/mid 90s could remain through the end of the week and potentially into the weekend. KEY MESSAGE 2...Next weekend could be active and unsettled with chances for showers and thunderstorms each day. Some storms could be severe and also may produce heavy rainfall leading to flash flooding. We are still several days out but are monitoring the severe weather setup as we get into next weekend. At this point the cold front that comes through the area late Wednesday into early Thursday looks to be mainly dry with just some spotty storms possible over the southern Poconos into NW NJ late Wednesday. Thursday and Friday look to be dry before chances for showers and storms return Saturday as the front tries to push back to the north as a warm front. Our POPs for Saturday range from around 30% south to around 50-60 percent near and north of the urban corridor. At this early vantage point the shear looks to be moderate to potentially strong with the main question being how unstable it will get. This will determine the extent of any severe weather threat but at this point we see at least some potential. PWATs (Precipitable Waters) will also be increasing to around 2+ inches so heavy rain and flash flooding look to be on the table as well. Conditions look to remain unsettled into Sunday as low pressure moves through from west to east and eventually drags a cold front through. There's uncertainty though regarding how fast this front pushes through and also whether it may get hung up near the area into early next week. If it moves through faster as the GFS (Global Forecast System) is indicating, things could start to clear out by later Sunday afternoon with fair weather to follow for Monday. However the ECMWF (European Centre for Medium-Range Weather Forecasts) hangs up the front over the area into next Monday with continuing chances for showers and storms. KEY MESSAGE 3...Spotty minor coastal flooding will be possible with tonight's high tide. While astronomical tides are increasing slightly with the New Moon tomorrow, flow is turning more offshore. Some spotty minor tidal flooding is likely tonight along the Atlantic coast, Delaware Bay, and tidal Delaware River, but water levels should remain below Advisory criteria. With offshore flow continuing and strengthening through the middle of the week, no tidal issues are expected after tonight's high tide. Marine Sub-SCA (Small Craft Advisory) conditions expected through Tuesday morning. Winds becoming south to southwest for tonight ranging from around 5 knots off the coast of Delaware to 10-15 knots off the coast of Monmouth County. Seas 2-3 feet. Outlook... Tuesday Afternoon through Tuesday Night...SCA (Small Craft Advisory) conditions possible (40-50%) for the New Jersey coastal waters as south/southwesterly wind gusts could get near 25 kt at times and seas near 5 feet. Wednesday through Friday...No marine headlines expected. Saturday...Winds could get near SCA (Small Craft Advisory) levels by the afternoon. Rip Currents... For Tuesday, flow largely turns offshore with a 7 to 9 second period swell. Wave heigheights remain around 2 feet or less as well, resulting in a LOW risk for rip currents for most of the Jersey Shore and Delaware Beaches. The exception is along the southern New Jersey coast in Atlantic and Cape May counties, where south facing beaches look to have some onshore flow in the afternoon as winds turn back a bit more southerly with a sea breeze. Waves in the surf zone look to increase up to 3 feet, and as a result there is a MODERATE risk for the development of dangerous rip currents for this area. For Wednesday, flow looks to remain offshore all day across the entire coast, with a 6 to 8 second period swell. Wave heights will be around 2 feet or less, resulting in a LOW risk for rip currents for all beaches. For specific beach forecasts, visit weather.gov/beach/phi Climate A brief 1-day spike in temperatures is expected, with highs likely to approach records. Here are the records for Wednesday, July 15: Allentown/ABE 98 in 1995 AC Airport/ACY 100 in 1995 AC Marina/55N 99 in 1995 Georgetown/GED 96 in 2024 and 1993 Mount Pocono/MPO 92 in 1954 Philadelphia/PHL 103 in 1995 Reading/RDG 100 in 1995 Trenton/TTN 101 in 1995 Wilmington/ILG 99 in 1997 and 1995 NOAA Mount Holly NJ Office: Watches - Warnings - Advisories PA...Extreme Heat Watch from Wednesday morning through Wednesday evening for PAZ070-071-104-106. Heat Advisory from 10am to 8pm EDT Wednesday for PAZ054-055- 060>062-101>103-105. NJ...Extreme Heat Watch from Wednesday morning through Wednesday evening for NJZ010-012-013-015-017>020-027. Heat Advisory from 10am to 8pm EDT Wednesday for NJZ001- 007>009-014-016-021>026. DE...Extreme Heat Watch from Wednesday morning through Wednesday evening for DEZ001. Heat Advisory from 10am to 8pm EDT Wednesday for DEZ002-003. MD...Extreme Heat Watch from Wednesday morning through Wednesday evening for MDZ012-015-019. Heat Advisory from 10am to 8pm EDT Wednesday for MDZ020. Marine None. |
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