Weather in Jakarta in October

A hard month. October is a hard month in Jakarta, and worth planning around. You should expect rain on 20 days of the month, which is more days wet than dry.

October ranks 12 of 12 — near the bottom of Jakarta's year. August is the month that works, and the swing between the two is 23 points, which is a different holiday rather than a slightly better one.

Rain on 20 of the month's 31 days, 4 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Pack for 30.8 °C days and 25.8 °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; the day barely swings — 5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest October day reached 34.1 °C and the coldest night fell to 23.3 °C, and the wettest single day dropped 78 mm — roughly 58% of the month's rain in one day.

October is moderately variable: 17 mm in the driest year against 355 mm in the wettest, around an average of 134 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind is light at 7.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How October sits in the year

Temperatures hold steady either side: 30.5 °C in September, 30.8 here, 30.2 in November. Nothing about the timing within the month matters much. Rain is the thing that moves: November brings 7 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in October

Jakarta sits close enough to the equator that daylight barely moves all year — 12.2 hours in October, 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 29.4 °C in October — warm enough that the water offers no relief from the heat. The sea peaks at 29.9 °C in May and bottoms out at 28.6 °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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

October in Jakarta versus nearby

If Jakarta is one option among several, the nearby comparison is worth making. Bandung is close enough to be a coin toss — 2.3 °C cooler, the same number of rain days. Bandar Lampung is close enough to be a coin toss — within a degree on temperature, 5 days less rain.

So: October is a compromise. August is 23 points better and is what Jakarta 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 Jakarta

See all twelve months in Jakarta, or where else to go in October.