Weather in Fortaleza in September

Prime time. If you get to pick your dates, September is the one. Highs average 30 °C, lows 25 °C, and rain falls on 1 days — nothing in the month is working against you.

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

Rain falls on only 1 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 30 °C days and 25 °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: 14 days top 30 °C — hot spells arrive, but they break; the day barely swings — 4.9 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest September day reached 31.9 °C and the coldest night fell to 23.4 °C.

September is dependably dry, and that reliability is the point: across the twenty years measured, the wettest September on record still only managed 10 mm, and the driest managed 0 mm. There is no meaningful variability to plan around, which makes this one of the few months anywhere that you can build a fixed outdoor itinerary against without a fallback. The wettest single day in twenty years of Septembers brought 5 mm. Rain simply is not the variable that decides this trip — heat, crowds and cost are.

Wind sits around 23.7 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 72%.

How September sits in the year

Temperatures hold steady either side: 29.5 °C in August, 30 here, 30.3 in October. Nothing about the timing within the month matters much.

Daylight in September

Fortaleza sits close enough to the equator that daylight barely moves all year — 12.1 hours in September, against a range of just 0.4 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 26.6 °C in September — warm enough to stay in as long as you like. The sea peaks at 28.8 °C in April and bottoms out at 26.6 °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

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.

September in Fortaleza versus nearby

If Fortaleza is one option among several, the nearby comparison is worth making. Recife is the weaker option in September — within a degree on temperature, 12 days more rain. Maceió is the weaker option in September — 2.4 °C cooler, 13 days more rain.

So: September is effectively as good as it gets here — 1 points behind August, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Fortaleza

See all twelve months in Fortaleza, or where else to go in September.