Weather in Zanzibar in June

Prime time. If you get to pick your dates, June is the one. Highs average 27.6 °C, lows 25.1 °C, and rain falls on 7 days — nothing in the month is working against you.

June ranks 4 of 12 in Zanzibar: past the worst of the year but short of July, which is the month to book if the dates are open.

Rain on 7 days, 0 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average June reaches 30 °C; the day barely swings — 2.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest June day reached 29.4 °C and the coldest night fell to 22.9 °C.

June is moderately variable: 7 mm in the driest year against 115 mm in the wettest, around an average of 29 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind sits around 22 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How June sits in the year

Temperatures hold steady either side: 28.4 °C in May, 27.6 here, 27 in July. Nothing about the timing within the month matters much. Rain has already shifted: 13 days fewer than May had.

Daylight in June

Zanzibar sits close enough to the equator that daylight barely moves all year — 11.8 hours in June, against a range of just 0.7 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 27.1 °C in June — warm enough that the water offers no relief from the heat. The sea peaks at 29.5 °C in March and bottoms out at 25.6 °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

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

June in Zanzibar versus nearby

If Zanzibar is one option among several, the nearby comparison is worth making. Dar es Salaam is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Mombasa is the weaker option in June — 2.1 °C warmer, 6 days more rain.

So: June works, with July the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Zanzibar

See all twelve months in Zanzibar, or where else to go in June.