A man has been arrested and charged with sexual assault on the Tiwi Islands, while, in a separate matter, a woman has been charged with assault.

Local police were notified by the health clinic at around 1.30am on Friday about an alleged sexual assault involving a 53-year-old man and his reported partner.

The female victim was medically evacuated to Royal Darwin Hospital for treatment of serious but non-life-threatening injuries.

The man was arrested later that day and charged with sexual intercourse without consent and aggravated assault.

He was also served with a Domestic Violence Order, police said.

The man was remanded in custody and is due to appear in Darwin Local Court today.

Also on Friday morning, a 23-year-old woman allegedly became involved in an argument with an adult male known to her before arming herself with a blunt object and striking him.

NT Police said the man suffered a broken arm and, after initially receiving treatment at the clinic, was airlifted to Darwin.

The woman was arrested on Friday afternoon and charged with unlawfully causing serious harm and two counts of going armed in public.

She was also served with a Domestic Violence Order and remanded in custody ahead of her appearance in Darwin Local Court today.

Anyone with information is urged to contact police on 131 444, quoting reference NTP2600105503 for the alleged sexual assault or NTP2600105498 for the alleged assault.

Anonymous reports can be made through Crime Stoppers on 1800 333 000 or via https://crimestoppersnt.com.au.

13YARN: 13 92 76

Brother to Brother: 1800 435 799

Yarning SafeNStrong: 1800 959 563

1800 RESPECT (1800 737 732)

National Sexual Abuse and Redress Support Service 1800 211 028

Lifeline (24-hour crisis line): 131 114

Full Stop Australia: 1800 385 578

Beyond Blue: 1300 224 636

Ruby Gaea (NT): 08 8945 0155