Meteo Tempio di Uluwatu in gennaio

Bali forum threads are consistent that January sits in the heart of wet season - generally the wettest or second-wettest month of the year - with a typical day running sunny, then rain arriving late afternoon into the evening or overnight. Posters were candid that some years bring a genuine 3-4 day stretch of near-continuous rain, though the more common pattern is afternoon showers bookending mostly dry, hot, steamy daytime hours. One west-coast-specific detail worth knowing: during wet season, ocean debris washes down the Java Sea and can wash up on Bali's west-facing beaches including the Jimbaran/Kuta/Seminyak stretch, more noticeably than during the dry months.

Uluwatu-forum and surf-guide threads on July agree it's the peak of the low-rain season and the peak of the swell: the year's biggest groundswells arrive this month, reliable SE trade winds blow offshore into the Bukit Peninsula's west-facing breaks every morning, and rainfall runs among its lowest totals of the year. The trade-off is crowding - the lineup itself is described as resembling a small city by mid-month, though most surfers call the wave quality worth it. Wind is the other consistent theme: mornings run clean and glassy, but afternoons turn genuinely blustery, choppy enough to affect snorkeling and noticeable enough that clifftop restaurant tables catch a steady breeze through the evening. Warm, sunny days are the norm. The record: 27.4C days, 24.5C nights, 57mm across 18 days, a 27.6C sea, 73 percent humidity and 10.9 hours of sun - more scattered rain days than the guides' "minimal rainfall" framing suggests.