Hair care in the rainy season: BMKG says the rains start in November

Rainy season hair care is worth planning this month. BMKG, Indonesia's meteorology agency, expects 185 season zones, about 24.66% of the country's land area, to enter the rainy season in November 2026, with peak rain from December to February. Hair that keeps getting caught in the rain is more fragile while wet, so washing, combing and drying need small adjustments.

This article sums up BMKG's official forecast, wet hair tips from American Academy of Dermatology (AAD) dermatologists, and an example hair routine from Kira.

When does the 2026/2027 rainy season start?

At its rainy season forecast press conference on 22 September 2026, BMKG head Teuku Faisal Fathani said most of Indonesia enters the rainy season in stages from November 2026.

• 185 season zones, or 24.66% of Indonesia's land area, enter the rainy season in November 2026.
• 266 season zones, or 17.31% of land area, follow in December 2026.
• A later start: onset in 529 zones, or 61.08% of land area, is expected to come later than the 1991 to 2020 average.
• A close peak: according to BMKG on 2 October 2026, the peak runs from December through February, relatively soon after the season begins.

Timing differs by area, so check your own season zone on BMKG's official channels.

Why wet hair needs different care

According to AAD dermatologists, hair is delicate when it is wet. In the rainy season, hair gets wet more often during the day and is then dried or combed in a hurry to look neat again. These small habits are what most often leave hair tangled and broken.

The AAD also notes that excessive heat damages every hair type. Reaching for a blow dryer or flat iron tends to happen more when hair is often damp, so keep the heat in check.

How to care for hair in the rainy season

1. 01Shampoo your scalp, not the whole length of your hair. It removes oil and build-up without drying out the hair too much.
2. 02Always follow with conditioner. Fine or straight hair only needs it on the ends; dry or curly hair needs it along the entire length.
3. 03Detangle wet hair with a wide-tooth comb, not a brush. Let straight hair dry a little first, then comb from the ends up. Thick, curly hair is easiest to comb before you rinse out the conditioner.
4. 04Dry gently. Wrap your hair in a towel or T-shirt to absorb water instead of rubbing it.
5. 05Limit heat. Use blow dryers and flat irons less, choose low or medium settings, and apply a heat protectant.

How often you wash depends on your hair. The AAD says straight hair with an oily scalp may need shampoo every day, while dry, textured, curly or thick hair can be washed when needed. If your hair is newly coloured, also read hair care after colouring.

An example hair routine from Kira

Every head of hair needs something different. Kira, Kiramora's AI beauty consultant on WhatsApp, reads your hair condition from a photo and builds a care routine. Here is a real Kira result:

For another model with dry hair and split ends, Kira suggested a weekly keratin hair mask, a hair serum with argan oil and vitamin E, and using heat tools less. See more Kira hair care results on the home page.

What it means for your hair

This year's rains arrive a little late, but the peak follows quickly. Get a wide-tooth comb, a soft towel, the right conditioner and a heat protectant ready now. If you often tie your hair up while it is wet, keep it loose; ideas are in hairstyles that do not cause hair loss.

Heavy shedding, an itchy scalp or dandruff that does not improve within 4 weeks is worth checking with a dermatologist.

Ask Kira about your hair on WhatsApp

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