Weather in Surat in September

A hard month. September is a hard month in Surat, and worth planning around. You should expect rain on 18 days of the month, which is more days wet than dry.

September ranks 8 of 12 in Surat: past the worst of the year but short of January, which is the month to book if the dates are open.

This is wet-season rain: 18 wet days and 8 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 19 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 37.4 °C and the coldest night fell to 21.7 °C, and the wettest single day dropped 135 mm — roughly 50% of the month's rain in one day.

September is moderately variable: 19 mm in the driest year against 507 mm in the wettest, around an average of 270 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 7.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 30.6 °C.

How September sits in the year

Temperatures hold steady either side: 29.5 °C in August, 30.6 here, 33 in October. Nothing about the timing within the month matters much. Rain is the thing that moves: October brings 12 days less of it, so pushing the dates later buys drier weather.

Daylight in September

12.3 hours of daylight, losing 0.6 hours across the month. That is between Surat's extremes of 13.4 and 10.9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 28.6 °C in September — warm enough that the water offers no relief from the heat. The sea peaks at 29.7 °C in June and bottoms out at 24.4 °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

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

September in Surat versus nearby

If Surat is one option among several, the nearby comparison is worth making. Nashik is a better bet in September — 3 °C cooler, 3 days more rain. Virār is a better bet in September — 2.4 °C cooler, 4 days more rain.

So: September is a compromise. January is 31 points better and is what Surat is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Surat

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