South Singapore
Sentosa weather
Southern resort island. Sea breeze and slightly lower daytime peaks than inland.
How rain usually arrives here
Sentosa is maritime and slightly milder by day than inland towns. Sea breeze is the local clock. Outdoor events should still treat lightning as a stop. A cell over the mainland south coast can be on the island in minutes.
A cell on the 50 km radar over the southern towns can be on Sentosa in minutes. Lightning, not just rain, is the outdoor stop.
South Singapore
The south coast and downtown sit in the urban heat island and in the sea-breeze clock. Afternoon storms often fire just inland of the Strait. Nights in the city stay a degree or two warmer than Mandai.