Long Island Sound West of New Haven CT / Port Jefferson NY Marine Forecast
| Today...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt Early This Afternoon, Then Becoming Nw Late. Seas Around 2 Ft This Morning, Then 1 Ft Or Less. Wave Detail: Sw 1 Ft At 3 Seconds. Chance Of Showers This Morning, Then Showers And Slight Chance Of Tstms This Afternoon. |
| Tonight...Ne Winds 5 To 10 Kt, Becoming E 10 To 15 Kt With Gusts Up To 20 Kt After Midnight. Seas 1 Ft Or Less, Then Around 2 Ft After Midnight. Wave Detail: Ne 1 Ft At 2 Seconds, Becoming E 2 Ft At 3 Seconds. Showers. Patchy Fog After Midnight With Vsby 1 To 3 Nm. |
| Thu...E Winds 15 To 20 Kt With Occasional Gusts Up To 25 Kt, Diminishing To 10 To 15 Kt In The Afternoon. Seas Around 2 Ft. Wave Detail: E 2 Ft At 4 Seconds. Chance Of Rain. Patchy Fog. Vsby 1 To 3 Nm. |
| Thu Night...E Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas Around 2 Ft In The Evening, Then 1 Ft Or Less. Wave Detail: E 2 Ft At 4 Seconds, Becoming E 1 Ft At 4 Seconds. Slight Chance Of Light Rain And Drizzle In The Evening, Then Chance Of Light Rain And Drizzle After Midnight. Areas Of Fog. Vsby 1 To 3 Nm. |
| Fri...E Winds Around 5 Kt, Becoming S In The Afternoon. Seas 1 Ft Or Less. Wave Detail: Sw 1 Ft At 2 Seconds And E 1 Ft At 4 Seconds. Chance Of Light Rain And Drizzle In The Morning. Areas Of Fog In The Morning With Vsby 1 To 3 Nm. |
| Fri Night...Sw Winds 5 To 10 Kt. Seas 1 Ft Or Less. Wave Detail: Sw 1 Ft At 2 Seconds. |
| Sat...S Winds 5 To 10 Kt. Seas Around 2 Ft. Chance Of Showers. |
| Sat Night...Se Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas Around 2 Ft. Chance Of Showers. |
| Sun...S Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft. Showers Likely. |
| Sun Night...W Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 2 To 4 Ft, Occasionally To 5 Ft. Chance Of Showers. Winds And Seas May Be Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service New York NY 720am EDT Wednesday April 1 2026 .WHAT HAS CHANGED... No significant changes have been made with this forecast. .KEY MESSAGES... 1. A thunderstorm will be possible this afternoon. Impacts should be limited. 2. Showers likely on Sunday with any impacts likely limited. 3. Some minor coastal flooding is possible with the high tides from Thursday morning into Friday morning, especially with the Thursday night high tide cycle. .KEY MESSAGE 1... Limited CAPE with unfavorable lapse rates will put a lid on the severe weather threat today, but will still mention a slight chance of a thunderstorm for some areas this afternoon as lift gets enhanced with a passing cold front. A brief moderate to heavy downpour will be possible, but probably with not enough rainfall for any concerns beyond spotty minor poor drainage flooding. Timing of this threat would be mid afternoon to early evening. .KEY MESSAGE 2... Anticipating a cold front to move through the area Sunday afternoon into evening. Rain is likely with the onset timing still somewhat uncertain due to model differences with timing of the front. This also has implications on whether or not a thunderstorm has a better chance of materializing than currently forecast. Should the slower guidance be correct, more of the area could have a longer time to destabilize ahead of the lift supplied by the front. Will keep out the mention of thunder for now as per WPC guidance. Should any convection occur, impacts would be strong wind gusts and isolated minor urban/poor drainage flooding. .KEY MESSAGE 3... Stuck with the bias-corrected blend of ETSS, STOFS, and NYHOPS 50th percentile which indicates departures of 1 to 1.5 ft generated by E flow Thu into Fri morning. This will combine with higher astronomical tides associated with Wednesday's full moon to lead to some minor coastal flooding with the high tide cycles from Thuam into Fri AM. Given the E flow the bigger impacts should occur with the Thu night high tide cycle along the south shore bays of Nassau, the tidal waters of NE NJ, and the SW CT coastline. Marine SCA (Small Craft Advisory) on the ocean waters through Thursday afternoon. There may be a period on the western ocean waters tonight where criteria is not being met, however as winds shift east and increase late tonight, waves will probably be back over 5 ft. Have therefore continued the SCA (Small Craft Advisory) here through the entire night. Elsewhere, occasional gusts around 25 kt possible late tonight into Thursday morning. Might need to eventually issue a SCA (Small Craft Advisory) for some of these other zones should guidance suggest stronger winds/gusts. The ocean SCA (Small Craft Advisory) may need to be extended into Thursday night due to elevated seas, otherwise relatively tranquil conds on Friday before seas build again at night into Saturday morning. SCA conds look probable for all waters on Sunday with the approach and passage of a cold front, but can't rule out gales on the ocean. Climate Record High Temperatures: April 1: KEWR: 82/1978 KBDR: 71/1955 KNYC: 83/1917 KLGA: 80/1978 KJFK: 75/1978 KISP: 67/1999 April 4: KEWR: 82/1950 KBDR: 71/2025 KNYC: 80/1892 KLGA: 76/2010 KJFK: 73/2010 KISP: 75/2010 Record High Minimum Temperatures: April 1: KEWR: 62/2016 KBDR: 53/2016 KNYC: 61/2016 KLGA: 56/2016 KJFK: 52/2016 KISP: 54/2016 April 4: KEWR: 61/1981 KBDR: 53/2025 KNYC: 62/1892 KLGA: 57/2025 KJFK: 57/2025 KISP: 54/2025 April 5: KEWR: 55/1981 KBDR: 49/1974 KNYC: 60/1892 KLGA: 53/2010 KJFK: 52/2010 KISP: 50/1981 NOAA New York NY Office: Watches - Warnings - Advisories CT...None. NY...None. NJ...None. Marine Small Craft Advisory until 6pm EDT Thursday for ANZ350-353- 355. |
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