Yes

you do need a jacket based on the weather in Umina Beach NSW 2257, Australia 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka!
49°F9°C & Partly Cloudy

Wind is 5 mph8 km/h from the West, gusting to 13 mph21 km/h
July 20
6pm50°F10°C5 mph9 km/h WestDrizzle
7pm54°F12°C5 mph8 km/h WestDrizzle
8pm58°F14°C4 mph7 km/h WestDrizzle
9pm61°F16°C3 mph4 km/h WestDrizzle
10pm62°F17°C3 mph4 km/h EastDrizzle
11pm63°F17°C4 mph6 km/h EastDrizzle
July 21
12am63°F17°C4 mph7 km/h EastMostly Clear
1am63°F17°C5 mph9 km/h EastMostly Clear
2am62°F17°C6 mph9 km/h EastMostly Clear
3am60°F16°C5 mph8 km/h EastMostly Clear
4am58°F14°C4 mph6 km/h NortheastClear
5am56°F13°C4 mph6 km/h NortheastClear
DateLowHighWindDayNight
July 2047°F9°C63°F17°C4 mph7 km/h from NortheastDrizzlePartly Cloudy
July 2150°F10°C66°F19°C8 mph12 km/h from NorthCloudyDrizzle
July 2247°F8°C64°F18°C6 mph10 km/h from WestDrizzleClear
July 2343°F6°C61°F16°C5 mph8 km/h from SouthwestClearMostly Clear
July 2442°F6°C61°F16°C5 mph7 km/h from NortheastMostly CloudyRain
July 2550°F10°C61°F16°C10 mph15 km/h from NorthRainClear
July 2649°F9°C59°F15°C12 mph19 km/h from NorthwestMostly ClearMostly Clear

Yes

Low of 50°F10°C, High of 66°F19°C
Wind: 8 mph12 km/h
Precipitation: None

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