Yes

you do need a jacket based on the weather in Flat Bush, Auckland, New Zealand 1 second ago

Why? Because it's super windy outside!

69°F21°C & Cloudy

Wind is 12 mph19 km/h from the Northeast, gusting to 27 mph43 km/h

Date	Low	High	Wind	Day	Night
April 1	65°F18°C	70°F21°C	10 mph17 km/h from Northeast	Cloudy	Cloudy
April 2	64°F18°C	68°F20°C	15 mph24 km/h from Northeast	Rain	Rain
April 3	64°F18°C	69°F21°C	18 mph28 km/h from North	Rain	Drizzle
April 4	60°F15°C	70°F21°C	10 mph16 km/h from Southwest	Mostly Clear	Mostly Clear
April 5	55°F13°C	68°F20°C	5 mph8 km/h from North	Mostly Clear	Drizzle
April 6	60°F16°C	67°F19°C	13 mph21 km/h from West	Partly Cloudy	Partly Cloudy
April 7	60°F16°C	67°F19°C	11 mph18 km/h from Northwest	Rain	Mostly Clear

Low of 64°F18°C, High of 68°F20°C
Wind: 15 mph24 km/h
Precipitation: 92% rain