Weather in Mombasa in August

A good month. August is a solid month to be in Mombasa. Highs average 30.6 °C, lows 21.9 °C, and rain falls on 8 days — nothing in the month is working against you.

August ranks 2 of 12 in Mombasa. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 8 days, 0 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 30.6 °C days and 21.9 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 23 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest August day reached 33.1 °C and the coldest night fell to 18.7 °C.

August is moderately variable: 10 mm in the driest year against 76 mm in the wettest, around an average of 29 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 14.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How August sits in the year

Temperatures hold steady either side: 29.7 °C in July, 30.6 here, 31.8 in September. Nothing about the timing within the month matters much.

Daylight in August

Mombasa sits close enough to the equator that daylight barely moves all year — 12 hours in August, against a range of just 0.5 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 25.7 °C in August — warm enough to stay in as long as you like. The sea peaks at 29.4 °C in April and bottoms out at 25.7 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Mombasa versus nearby

If Mombasa is one option among several, the nearby comparison is worth making. Zanzibar is a better bet in August — 3.4 °C cooler, 4 days less rain. Dar es Salaam is a better bet in August — 2.5 °C cooler, 4 days less rain.

So: August is effectively as good as it gets here — 4 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Mombasa

See all twelve months in Mombasa, or where else to go in August.