Visitors to Bali were warned about significant and dangerous waves expected to hit the island's most popular coastal destinations.

With the rainy season officially beginning in the province, travelers can anticipate receiving more alerts for severe weather conditions in the upcoming months. The Head of the Meteorology, Climatology, and Geophysics Agency (BMKG) Region III, Denpasar, Cahyo Nugroho, addressed the press about the possibility of large and perilous waves at Bali’s most frequented tourist beaches through Thursday, December 5, and into the weekend.

Nugroho reported to the press that pre-warnings for waves up to 1.25 to 2.5 meters high had already been released, hitting southern Bali Strait, Badung Strait, southern Lombok Strait, and waters around southern Bali, which all represent a threat to maritime safety and marine tourism operations. He appeals to the public to be vigilant and alert to the impacts of extreme weather this week and during the monsoon season, including flooding, waterlogging, landslides, and fallen trees.

In particular, visitors, fishermen, and marine tourism operators should be more vigilant about increased wind speeds and wave heights up to 2 meters in southern Bali waters.

He added, "Stay updated by checking updates from BMKG, especially early warnings of extreme weather or climate events." Meanwhile, the Head of the Coastal Lifeguard team in Kuta, I Ketut Ipel, confirmed that his team will continue monitoring conditions from Kuta Beach through Canggu Beach, including Seminyak Beach and Legian Beach.

He said that the visitors must be aware of the flag warning system at this particular stretch of coastline called Samigita and go in the water only when it is declared safe.

Tourists are being encouraged to swim in areas that are considered safe areas, between the red and yellow flags put by officers." He added, "It is our foremost concern that the safety of travelers should be ensured. Cooperation from everyone involved is called to follow the regulations for everyone's comfort."

The beach safety flags are straightforward. A half-red, half-yellow flag indicates it is okay to swim; a solid red flag indicates it is unsafe; a plain yellow flag, though rarely used in Bali, indicates caution is in order.

A red and white checkered flag warns everybody to get out of the water and for lifeguards also staked on the beach calling for people to return shore. Heavy rains would prevail within the province till March of 2025. By that time the rainy season would begin for the sake of Bali.

While most rainstorms are short-lived, the impact of heavy downpours can be dramatic. Flooding, tree falls, and landslides are all more likely during this time of year in Bali.

Travelers who plan to take day trips during the rainy season should always carry waterproof bags for electronics and gadgets, as well as rain jackets or ponchos to keep dry.

On a longer trip, it's advisable to carry spare clothing because the weather can easily change.

Travelers must also factor in extra traveling time during the rainy season, especially during the Christmas and New Year holidays, when most people travel.

Most of the heavy downpours lead to flooded roads, causing traffic jams, especially during the festive period, which is usually a busy season with many people on the roads.

According to the Bali Regional Disaster Management, "We are ready to support the communities across Bali for this rainy season." The organizations have already disbursed over 900 relief packages ahead of the monsoon to aid families.