Batam is warmest in May, averaging 30° by day and 28° at night. The wettest month is March with 428 mm, and the year brings about 4225 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 29° | 26° | 397 mm | 28° | 11.9 h | Rainy season |
| February | 29° | 26° | 364 mm | 28° | 12.0 h | Rainy season |
| March | 30° | 26° | 428 mm | 29° | 12.0 h | Rainy season |
| April | 30° | 27° | 267 mm | 30° | 12.0 h | Rainy season |
| May | 30° | 28° | 360 mm | 31° | 12.1 h | Rainy season |
| June | 30° | 28° | 300 mm | 30° | 12.1 h | Rainy season |
| July | 29° | 27° | 307 mm | 30° | 12.1 h | Rainy season |
| August | 29° | 27° | 372 mm | 30° | 12.0 h | Rainy season |
| September | 29° | 27° | 342 mm | 30° | 12.0 h | Rainy season |
| October | 29° | 27° | 347 mm | 30° | 12.0 h | Rainy season |
| November | 29° | 27° | 384 mm | 30° | 11.9 h | Rainy season |
| December | 29° | 26° | 357 mm | 29° | 11.9 h | Rainy season |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: No month in Batam combines swimming warmth with dry skies.
Wet season: January, February, March, April, May, June, July, August, September, October, November and December — up to 428 mm in a single month.