Yes

you do need a jacket based on the weather in Mombasa, Kenya 1 second ago

Why? Because it's so windy, even the squirrels are holding onto branches for dear life!

77°F25°C & Mostly Clear

Wind is 12 mph19 km/h from the South, gusting to 21 mph34 km/h

Date	Low	High	Wind	Day	Night
June 21	74°F23°C	82°F28°C	11 mph18 km/h from South	Partly Cloudy	Mostly Clear
June 22	74°F24°C	82°F28°C	13 mph22 km/h from South	Partly Cloudy	Mostly Clear
June 23	73°F23°C	83°F28°C	13 mph20 km/h from South	Drizzle	Drizzle
June 24	74°F23°C	81°F27°C	9 mph14 km/h from South	Rain	Drizzle
June 25	73°F23°C	80°F27°C	9 mph15 km/h from South	Rain	Mostly Cloudy
June 26	73°F23°C	83°F28°C	11 mph17 km/h from South	Partly Cloudy	Partly Cloudy
June 27	74°F23°C	83°F28°C	12 mph19 km/h from South	Partly Cloudy	Partly Cloudy

Low of 74°F24°C, High of 82°F28°C
Wind: 13 mph22 km/h
Precipitation: 7% rain