Cambodia in March: Weather, Crowds & What to Expect

Siem Reap & Northwest (Angkor, Battambang)

The first true heat of the year arrives, and Angkor’s stone pathways radiate afternoon warmth; thermometers often climb toward 35°C on still days. Khmer New Year festivities in mid-April make towns lively and accommodations busy - book ahead if you want a quiet stay. Late afternoons can be stifling, so plan temple exploration for dawn and dusk and expect short, sharp showers to become more frequent by month’s end.

Tonle Sap & Central Plains (Phnom Penh, Tonle Sap Lake, Kampong Thom)

March heats up noticeably across the central plains with daytime temperatures often in the low 30s and the humidity slowly rising; Phnom Penh grows sultrier and the sun is strong at Angkortemple outskirts. Farmers begin burning old rice stubble in places, sometimes causing local haze in the afternoons - urban areas can feel gritty. If you’re on river trips, plan early-morning departures to avoid blistering afternoons and longsit in shaded cafés at midday.

Southern Coast & Islands (Sihanoukville, Koh Rong, Koh Rong Samloem, Kep)

March heats up, increasing humidity and occasional onshore breezes; daytime highs frequently reach the low 30s and the sea begins to warm. Boat crossings are still generally calm but start to feel choppier on longer routes; Koh Rong’s beaches are good for swimming early and late in the day. Carry sun protection and a hat - midday shade on the sand is limited.

Cardamom Mountains & Southwest (Koh Kong, Cardamom range, Bokor, Botum Sakor)

By March the interior heats up but the highlands still offer respite; daytime temps in the lowlands move into the low 30s while Bokor’s plateau stays noticeably cooler and cloudier. Guided wildlife walks can be productive as animals use remaining waterholes, but early afternoon storms start to become possible. Bring sun protection and plan longer treks for early mornings when shade is welcome.

Northeast Uplands (Ratanakiri, Mondulkiri - highlands, waterfalls, ethnic villages)

March sees hotter afternoons moving into the low 30s at lower elevations, though highland ridges still hold pleasant breezes; the landscape begins to dry and dust increases. Local farmers prepare fields and occasional burning in scattered areas can create short-lived haze. Plan early starts for wildlife walks and book transport in advance as regional travel picks up before Khmer New Year.