23° to 31°
Wettest Month
The rainiest month of the year, when the northeast monsoon is in full force and flooding is possible.
☔ Heavy rain gear⚠️ Flash-flood aware
23° to 31°
Deep Monsoon
Still deep in the wet season, though rain eases slightly from January's peak.
☔ Heavy rain gear🥵 Heat protection
24° to 31°
Rain Persists
Warm and consistently wet, with rain a near-daily presence.
☔ Umbrella essential🥵 Heat protection
24° to 32°
Rain Persists
Similar to March, warm and humid with frequent showers.
☔ Umbrella essential🥵 Heat protection
24° to 32°
Best of a Wet Year
The warmest month of the year and one of the lighter ones for rain, as close to a favorable stretch as Bintulu gets.
☔ Umbrella handy🥵 Heat protection
24° to 32°
Calmer Stretch
Rain eases slightly, though still a regular part of most days.
☔ Umbrella handy🥵 Heat protection
24° to 32°
Calmer Stretch
One of the drier months by local standards, warm and humid throughout.
☔ Umbrella handy🥵 Heat protection
24° to 32°
Rain Builds
Rain ticks back up as the month goes on, still warm and humid.
☔ Umbrella essential🥵 Heat protection
23° to 32°
Rain Persists
Consistently wet and warm, typical of Bintulu's equatorial climate.
☔ Umbrella essential🥵 Heat protection
23° to 31°
Monsoon Approaches
Rain increases noticeably as the northeast monsoon begins building.
☔ Heavy rain gear⚠️ Flash-flood aware
23° to 31°
Deep Monsoon
The northeast monsoon settles in hard, with sustained heavy rain and some flood risk.
☔ Heavy rain gear⚠️ Flash-flood aware
23° to 31°
Near-Wettest Month
Nearly as wet as January, with the monsoon in full force through the month.
☔ Heavy rain gear⚠️ Flash-flood aware
★★★ peak season, ★★☆ decent shoulder months, ★☆☆ true off-peak, based on rain frequency, heat, and haze.
Frequently asked questions
When is monsoon season in Bintulu?›
Bintulu doesn't have a single monsoon season in the way many other cities do; it's genuinely rainy year-round. That said, the northeast monsoon historically brings the heaviest rain from November through January, with January the wettest month, averaging around 460mm across 18 days.
What is the best time of year to visit Bintulu?›
May through July is historically the closest Bintulu comes to a favorable stretch, though even then rain remains a regular feature; there's no month here that qualifies as a true dry season.
What is the least favorable time to visit Bintulu?›
November through January historically brings the heaviest, most sustained rain of the year, and flooding is possible during the wettest spells.
Which month has the most rain in Bintulu?›
January is historically the wettest month, averaging around 460mm of rain across 18 days.
Which month is the driest in Bintulu?›
May is historically the driest month, though it still averages around 234mm of rain across 13 days, well short of a true dry season.
How hot does Bintulu get?›
May is historically the warmest month on average, though temperatures stay fairly consistent year-round, generally in the low 30s Celsius by day.
Why doesn't Bintulu have a dry season?›
Bintulu sits close to the equator on the northern coast of Borneo, which puts it in a genuinely equatorial climate zone, warm, humid, and rainy in every month, unlike Peninsular Malaysia's coasts, which see more distinct monsoon-driven wet and dry swings.
Is Bintulu humid?›
Yes, consistently. Average humidity historically sits in the low-to-mid 80s percent range every month of the year.
Can I swim in the sea year-round in Bintulu?›
Yes. Sea temperatures historically stay between about 28°C and 30°C all year, warm enough for swimming in any month.
Does flooding affect Bintulu?›
Heavy rain, particularly during the wettest months from November to January, has historically caused flooding in parts of the city, worth checking local conditions if traveling during this stretch.