Long Island Sound East of New Haven CT/Port Jefferson NY Marine Forecast
| This Afternoon...Ne Winds 15 To 20 Kt With Gusts Up To 25 Kt, Diminishing To 10 To 15 Kt Late. Seas 2 To 3 Ft. Wave Detail: E 2 Ft At 4 Seconds. Light Rain Likely Early. |
| Tonight...E Winds 10 To 15 Kt, Diminishing To 5 To 10 Kt After Midnight. Seas Around 2 Ft. Wave Detail: E 2 Ft At 4 Seconds. Chance Of Light Rain And Drizzle With Areas Of Fog, Both Mainly After Midnight. Vsby Decreasing To Less Than 1 Nm After Midnight. |
| Fri...Se Winds 5 To 10 Kt. Seas 1 Ft Or Less. Wave Detail: E 1 Ft At 4 Seconds. Chance Of Light Rain And Drizzle, Mainly In The Morning. Areas Of Fog In The Morning, Then Patchy Fog In The Afternoon. Vsby Less Than 1 Nm. |
| Fri Night...Sw Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas Around 2 Ft. Wave Detail: Sw 1 Ft At 3 Seconds. |
| Sat...Sw Winds 5 To 10 Kt, Becoming Se 10 To 15 Kt In The Afternoon. Seas 1 Ft Or Less. Wave Detail: Sw 1 Ft At 3 Seconds. |
| Sat Night...Se Winds 15 To 20 Kt. Seas Around 2 Ft. |
| Sun...Sw Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft. Showers. |
| Sun Night...W Winds 15 To 20 Kt With Gusts Up To 25 Kt. Seas 2 To 3 Ft. Chance Of Showers. |
| Mon...W Winds 10 To 15 Kt. Seas Around 2 Ft. |
| Mon Night...Nw Winds 5 To 10 Kt. Seas 1 Ft Or Less. |
| Area Forecast Discussion National Weather Service New York NY 1114am EDT Thu April 2 2026 .WHAT HAS CHANGED... Small Craft Advisories extended until 8am Fri for the ocean waters. .KEY MESSAGES... 1. Potential dense fog late tonight into Friday morning mainly for coastal areas. 2. Minimal tidal flooding impacts for tonight. 3. Showers likely on Sunday with any impacts likely limited. .KEY MESSAGE 1... Warm front advances from the south late tonight. Associated lift ahead of the front with shallow moisture could produce light rain and drizzle tonight. Fog will then become more likely late in the night into Friday morning with the wind flow turning more southerly and warmer dewpoints advect over colder sea surface temps. Confidence is not high regarding how low the surface visibility will be reduced, however some guidance suggests there could be areas to widespread instances where the visibility falls to a quarter of a mile or less. No advisories planned at the moment, but it's something that'll need to be monitored. Highest chances of dense fog will be towards the coast. .KEY MESSAGE 2... Spring tides along with a persistent ENE flow will allow tides to briefly rise to near minor flood stage across the most vulnerable back bay locations of Nassau County as well as along portions of Staten Island and parts of NE NJ this evening. The current forecast is a blend of 50th percentile PETSS and NYHOPS with minor adjustments, particularly where the bias correction seems to be running a little too high. .KEY MESSAGE 3... Forecast trends remain for the timing of a strong cold front that is expected to move through the region Sunday into Sunday night with showers. With limited surface and elevated CAPE, thunderstorms are not included in the forecast at this time. An isolated thunderstorm can not be completely ruled out as a low level jet will provide some lift along with the cold front, and some guidance is indicating stronger convective elements late Sunday morning into the afternoon. Regardless of thunder, brief heavy downpours are possible with isolated minor urban/poor drainage flooding, along with gusty winds with the stronger showers. Marine Ocean seas running up to 2 ft above forecast, so SCA (Small Craft Advisory) there extended until 8am Fri and may eventually have to run even longer into daytime Fri for elevated seas. SCA (Small Craft Advisory) also remains in effect for the non ocean waters with winds gusting to 25 kt there especially into early this afternoon. Next chance of advisory conditions would then be Friday night on the ocean with a brief increase in winds and seas. Otherwise, widespread advisory cond for Sat night into Sunday in association with the passage of a cold front. Still some potential for a brief period of gales on the ocean during that time. Seas will take some time to subside behind the cold front, so still a good chance of lingering elevated seas on the ocean into some of Monday. NOAA New York NY Office: Watches - Warnings - Advisories CT...None. NY...None. NJ...None. Marine Small Craft Advisory until 6pm EDT this evening for ANZ331- 332-335-338-340-345. Small Craft Advisory until 8am EDT Friday for ANZ350-353-355. |
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