Yes

you do need a jacket based on the weather in Setauket- East Setauket, NY, USA 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat and it's windy enough to give you a brand new hairdo!
54°F12°C & Cloudy

Wind is 12 mph20 km/h from the South, gusting to 22 mph36 km/h
April 19
2am54°F12°C12 mph19 km/h SouthwestCloudy
3am55°F13°C13 mph21 km/h SouthCloudy
4am55°F13°C14 mph22 km/h SouthwestMostly Cloudy
5am56°F13°C13 mph21 km/h SouthwestCloudy
6am57°F14°C12 mph20 km/h SouthwestCloudy
7am58°F15°C12 mph20 km/h SouthwestCloudy
8am59°F15°C13 mph21 km/h SouthwestMostly Cloudy
9am62°F17°C13 mph21 km/h SouthwestMostly Cloudy
10am64°F18°C14 mph22 km/h SouthwestMostly Cloudy
11am67°F20°C13 mph22 km/h SouthwestMostly Cloudy
12pm70°F21°C14 mph23 km/h SouthwestMostly Cloudy
1pm73°F23°C15 mph24 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
April 1954°F12°C75°F24°C14 mph23 km/h from SouthwestMostly CloudyPartly Cloudy
April 2050°F10°C65°F19°C12 mph19 km/h from NorthwestPartly CloudyPartly Cloudy
April 2145°F7°C58°F14°C7 mph11 km/h from SoutheastMostly CloudyCloudy
April 2251°F10°C72°F22°C9 mph14 km/h from SouthwestMostly CloudyPartly Cloudy
April 2348°F9°C66°F19°C5 mph7 km/h from WestPartly CloudyMostly Clear
April 2447°F8°C70°F21°C6 mph9 km/h from SouthPartly CloudyPartly Cloudy
April 2550°F10°C72°F22°C7 mph11 km/h from NortheastMostly CloudyRain

Yes

Low of 50°F10°C, High of 65°F19°C
Wind: 12 mph19 km/h
Precipitation: None

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