Yes

you do need a jacket based on the weather in Gosford NSW 2250, Australia 1 second ago

Why? Because it's not very warm out.
54°F12°C & Mostly Clear

Wind is 6 mph9 km/h from the SW, gusting to 12 mph19 km/h
April 25
5pm54°F12°C6 mph9 km/h SWMostly Clear
6pm58°F14°C6 mph9 km/h SWClear
7pm62°F16°C7 mph11 km/h SWClear
8pm65°F19°C8 mph12 km/h SWClear
9pm68°F20°C8 mph13 km/h SClear
10pm70°F21°C8 mph12 km/h SClear
11pm70°F21°C8 mph12 km/h SClear
April 26
12am71°F22°C8 mph12 km/h SClear
1am70°F21°C7 mph12 km/h SClear
2am68°F20°C7 mph11 km/h SClear
3am66°F19°C6 mph10 km/h SClear
4am63°F17°C5 mph8 km/h SClear
DateLowHighWindDayNight
April 2551°F11°C71°F22°C7 mph11 km/h from SClearClear
April 2648°F9°C71°F22°C4 mph7 km/h from SMostly ClearMostly Clear
April 2750°F10°C75°F24°C5 mph8 km/h from NEPartly CloudyPartly Cloudy
April 2853°F12°C80°F27°C4 mph6 km/h from NMostly ClearDrizzle
April 2954°F12°C67°F19°C9 mph14 km/h from SDrizzleDrizzle
April 3049°F9°C64°F18°C11 mph18 km/h from SRainDrizzle
May 148°F9°C66°F19°C10 mph16 km/h from SWMostly ClearPartly Cloudy

Yes

Low of 48°F9°C, High of 71°F22°C
Wind: 4 mph7 km/h
Precipitation: 21% rain

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