New York Harbor Marine Forecast
| Rest Of Today...Se Winds Around 5 Kt. Waves 1 Ft Or Less. |
| Tonight...Se Winds Around 5 Kt, Becoming N After Midnight. Waves 1 Ft Or Less. |
| Wed...Ne Winds Around 5 Kt, Becoming Se In The Afternoon. Waves 1 Ft Or Less. Chance Of Showers And Slight Chance Of Tstms In The Afternoon. |
| Wed Night...S Winds 5 To 10 Kt. Waves Around 2 Ft. Slight Chance Of Showers And Tstms In The Evening, Then Chance Of Showers After Midnight. |
| Thu...Sw Winds 5 To 10 Kt. Waves 1 Ft Or Less, Then Around 2 Ft In The Afternoon. Chance Of Showers. Chance Of Tstms In The Afternoon. |
| Thu Night...Sw Winds 5 To 10 Kt. Waves Around 2 Ft. Chance Of Showers. |
| Fri...Sw Winds Around 5 Kt. Waves Around 2 Ft In The Morning, Then 1 Ft Or Less. Chance Of Showers And Tstms In The Afternoon. |
| Fri Night...Sw Winds 5 To 10 Kt. Waves 1 Ft Or Less. Chance Of Showers. |
| Sat...Sw Winds 5 To 10 Kt. Waves 1 Ft Or Less. Chance Of Showers. |
| Sat Night...W Winds 5 To 10 Kt. Waves 1 Ft Or Less. |
| Sun...W Winds 5 To 10 Kt. Waves 1 Ft Or Less. |
| Sun Night...W Winds 5 To 10 Kt. Waves 1 Ft Or Less. Winds And Waves May Be Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service New York NY 1034pm EDT Tuesday August 4 2026 .WHAT HAS CHANGED... Guidance has been trending further west for showers and storms during the daytime tomorrow. .KEY MESSAGES... 1. Potential for scattered afternoon/early evening heavy downpour and thunderstorm activity from Wednesday into the weekend. 2. Very warm and very humid for Thursday into the weekend. .KEY MESSAGE 1... Potential for scattered afternoon/early evening heavy downpour and thunderstorm activity from Wednesday into the weekend. Scattered afternoon shower/thunderstorm threat returns on Wednesday and continues through the weekend as region lies on NW edge of Bermuda ridging. This will also bring a very warm and very humid air mass into the region Thu thru the weekend with deep SW flow and H8 temps rising to 18-20C. Forcing will be from weak convectively enhanced vort maximum rounding the upper ridge Wednesday and Thu, and then approaching weak northern stream shortwave troughs Fri into the weekend. Latest guidance depicts the low level convergence mostly west of the city. Additionally, not expecting any significant moisture advection (aside from the thin layer near the surface due to the sea breeze) until after sunset Wednesday. Thus, during the day time, expect most of the shower and storm activity to stay southwest of the region. It could start to expand eastward after 00Z (getting into the evening hours). As the moisture builds particularly from Thursday onward, this will present an isolated severe and flash flood threat, primarily in the afternoon and evening hours. Storm motions are expected to be moderate through this period (20 to 30 kts), so it may come down to if there will be any training of storms or if brief, heavy downpours occur over the most flood vulnerable locations. All that being said, the marginal (1 out of 4) excessive rain outlook for Thursday and Friday seems reasonable at this point. For the severe threat, that will be dependent on the exact timing of the short wave troughs, which at this point is uncertain. As we get closer, should have a better idea on the periods where this may be more of a concern. .KEY MESSAGE 2... Very warm and very humid for Thursday into the weekend. Temps should rise to at least to the upper 80s to around 90 for NE NJ/NYC metro and the interior, with dewpoints in the mid 70s, from Thu through Mon. GFS (Global Forecast System) MOS guidance shows lower dewpoints but higher temperatures compared to NBM. Both bring heat index values to 95-100 on Thu, 95-104 Fri, and continuing above 95 in urban/coastal areas and across the interior river valleys from Sat-Mon. If this trend continues, a heat advisory may be needed. Marine Could see a period of winds/seas approaching 25 kt and 5 ft on the ocean waters W of Moriches Inlet from late day into the evening on Thu. Rip Currents A moderate rip current risk is expected for Wednesday as SSE swells continue to subside closer to 3 ft. The moderate risk should continue through most of Thursday, however it may increase to high at some beaches by late in the day as southerly winds and swells increase. NOAA New York NY Office: Watches - Warnings - Advisories CT...None. NY...None. NJ...None. Marine None. |
New York Radar
Northeast Radar
East Coast Satellite