The CDC reports no malaria in Penang. Plan around dengue and a few green corners.

Yes, but Penang is one of Malaysia's easier stops. The CDC reports no malaria anywhere in Penang State, and Penang's dengue count ran well below 2025 in the first half of 2026 while the country's climbed. The mosquito that matters bites by day, in shophouse courtyards and on the green hills. Our Malaysia briefing covers the rest of the country.

Dengue: a quieter year in Penang

Penang's case count to late June 2026 was about a third below the same period of 2025, with fewer deaths, according to press reports of state health committee figures. The state still had about 60 dengue outbreak localities in late June, the largest share in the Northeast district, which takes in George Town, and most of the rest on the mainland in Seberang Perai. We couldn't find a Penang figure after early July, so it isn't clear whether the state joined the national rise later in the summer.

Nationally, the World Health Organization counted 63,752 cases and 60 deaths through late August 2026, above 2025 and the 2021–2025 median, with weekly cases rising since late March. Malaysia is on the CDC's global dengue list, a Level 1 notice.

The Aedes mosquito breeds in plant pots, air wells and small containers, and it bites in daylight, with peaks after sunrise and before sunset. Put repellent on over sunscreen before a morning of heritage streets, then top it up in the afternoon and before the hawker centers or the Batu Ferringhi night market. Choose an air-conditioned or screened room, and in a shophouse or apartment, empty plant saucers and other standing water. Our dengue & Zika routine has the full schedule.

No malaria, and no city-trip vaccines

The CDC's Malaysia page reports "No malaria transmission in other areas, including Kuala Lumpur (the capital), in Penang State, on Penang Island, or in George Town (capital of Penang State)." That covers the whole state, Penang Hill and Penang National Park included. The CDC lists malaria medicine only "In rural, forested areas" elsewhere in Malaysia, so a side trip to Taman Negara or a Borneo rainforest lodge is a question for a travel clinic 4–6 weeks before departure.

For Japanese encephalitis, the CDC says the vaccine is "Not recommended for travelers planning short-term travel to urban areas," and "Chikungunya vaccination is generally not recommended." Yellow fever vaccine isn't recommended either, and Malaysia asks for proof only from travelers arriving from countries with yellow fever risk, including layovers of more than 12 hours there.

Hills, trails and the beach

Mosquitoes have a reputation for coming out on Penang Hill early in the morning after overnight rain, and the shaded trail through Penang National Park to Monkey Beach, the Botanic Gardens and the hillside grounds of Kek Lok Si are the same kind of setting. Wear light long trousers and repellent on the trails, and keep food and bags out of sight of the macaques, which tend to grab both. Batu Ferringhi's beach draws few complaints, though the shade under the casuarina trees has a reputation for mosquitoes.

When to go

Penang's driest months, roughly December to February, are the easiest stretch. The wettest are roughly September to November, with a smaller wet spell around April and May, and dengue tends to follow heavy rain by a few weeks. No month is dengue-free.

Where you're going

Heading on? Our Kuala Lumpur briefing covers the capital's heavier 2026 dengue year, and the Borneo briefing covers the rainforest lodges where the CDC lists malaria medicine.

What travelers report

Paraphrased from a November 2025 TripAdvisor thread and linked so you can read it in full. One thread is a small sample, and bites vary with the weather and where you stay.

• Penang (trip also covering Malacca, Kuala Lumpur and Langkawi) · January trip (thread from November 2025) · 2025

  A traveler due in early January asked whether costly Japanese encephalitis and chikungunya vaccines were needed. Replies were mostly reassuring: one said mosquitoes are most likely around vegetation and at dawn, dusk and after dark and recommended air-conditioned rooms plus DEET, another said the council sprays, inspects and keeps drains clear, and several long-stay visitors reported few or no bites in Penang and Langkawi. TripAdvisor ↗

One rule outlasts the trip. A fever, headache, eye pain or rash during or after the trip means a doctor visit and a dengue test, and you tell them you were in Malaysia. Until dengue is ruled out, take acetaminophen (paracetamol) rather than ibuprofen. Bitten in a dengue zone has the 14-day calendar.

Traveler questions