Mombasa is warmest in February, averaging 35° by day and 24° at night. The wettest month is May with 229 mm, and the year brings about 1156 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 33° | 24° | 31 mm | 28° | 12.2 h | Beach weather |
| February | 35° | 24° | 28 mm | 28° | 12.1 h | Beach weather |
| March | 34° | 25° | 71 mm | 29° | 12.0 h | Beach weather |
| April | 31° | 24° | 195 mm | 29° | 11.9 h | Rainy season |
| May | 29° | 23° | 229 mm | 28° | 11.8 h | Rainy season |
| June | 28° | 21° | 114 mm | 27° | 11.8 h | Mild |
| July | 28° | 21° | 68 mm | 26° | 11.8 h | Beach weather |
| August | 29° | 21° | 37 mm | 26° | 11.9 h | Beach weather |
| September | 30° | 21° | 87 mm | 26° | 12.0 h | Beach weather |
| October | 32° | 22° | 47 mm | 27° | 12.1 h | Beach weather |
| November | 32° | 23° | 153 mm | 28° | 12.2 h | Mild |
| December | 32° | 24° | 96 mm | 28° | 12.2 h | Beach weather |
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: January, February, March, July, August, September, October and December — highs around 32°, nights no colder than 21°, and at most 96 mm of rain in a month. The sea sits at 26–29° then.
Wet season: April and May — up to 229 mm in a single month.