Yes

you do need a jacket based on the weather in Hallett Cove SA 5158, Australia 1 second ago

Why? Because it's on the windy side!
71°F22°C & Cloudy

Wind is 11 mph17 km/h from the Southeast, gusting to 21 mph33 km/h
November 24
3am71°F22°C11 mph17 km/h SoutheastCloudy
4am69°F20°C11 mph17 km/h SoutheastCloudy
5am66°F19°C10 mph17 km/h SoutheastCloudy
6am65°F18°C10 mph17 km/h SoutheastCloudy
7am64°F18°C11 mph17 km/h SoutheastCloudy
8am63°F17°C10 mph16 km/h SoutheastCloudy
9am63°F17°C9 mph15 km/h SoutheastCloudy
10am62°F17°C8 mph13 km/h SoutheastMostly Cloudy
11am62°F17°C7 mph11 km/h SoutheastMostly Cloudy
12pm61°F16°C6 mph10 km/h SoutheastMostly Cloudy
1pm61°F16°C6 mph10 km/h SoutheastMostly Clear
2pm61°F16°C6 mph10 km/h SoutheastMostly Clear
DateLowHighWindDayNight
November 2363°F17°C75°F24°C7 mph11 km/h from SouthCloudyMostly Cloudy
November 2461°F16°C78°F25°C7 mph11 km/h from SouthwestMostly ClearMostly Clear
November 2566°F19°C83°F29°C7 mph12 km/h from NorthwestMostly CloudyThunderstorms
November 2659°F15°C69°F21°C14 mph22 km/h from WestPartly CloudyPartly Cloudy
November 2758°F14°C67°F20°C11 mph18 km/h from SouthPartly CloudyPartly Cloudy
November 2857°F14°C70°F21°C8 mph14 km/h from SouthwestPartly CloudyPartly Cloudy
November 2959°F15°C71°F21°C8 mph13 km/h from SouthwestPartly CloudyMostly Clear

No

Low of 61°F16°C, High of 78°F26°C
Wind: 7 mph11 km/h
Precipitation: None

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