Kanchanaburi Rain Radar - Live Weather Map | RainViewer
Track rain across Kanchanaburi in real time with RainViewer, a hyperlocal rain radar app, updated every 5 minutes, street by street.
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Rain in Kanchanaburi: What You Need to Know
Kanchanaburi rain comes from the mountains and it arrives suddenly. The Tenasserim Hills along the Myanmar border wring moisture from southwest monsoon air, and the rain feeds the Kwai Noi and Kwai Yai rivers - the rivers that power the Vajiralongkorn and Sri Nakharin dams. The tourist areas - the Bridge on the River Kwai, the Death Railway route, Erawan National Park - sit in a landscape where mountain rain and lowland rain behave very differently.
Erawan National Park's waterfalls and trails are the specific point where rain creates urgent decisions. The trails to the upper tiers become dangerous within minutes of a heavy cell hitting the upper catchment. A clear sky at the car park means nothing if rain is falling 10km upstream.
RainViewer Radar Coverage in Kanchanaburi
RainViewer combines central and western Thailand radar for Kanchanaburi. From here, you can track rain in Ratchaburi, Suphan Buri, and Nakhon Pathom - useful if you're driving Route 323 toward Bangkok or heading into the national parks near the Myanmar border. Mountainous terrain in the far west creates some radar shadow zones.
Wet season (May-October)
The mountainous western districts receive considerably more rain than the eastern lowlands - over 1,500mm annually in some areas. Peak risk is August and September.
Transition months (May and October)
May often brings the first flash flood events. October's late-season cells carry disproportionate flood risk because rivers are already high.
Dry season (November-April)
January and February are the driest months. April sees the first pre-monsoon showers.
Why You Need a Rain Radar in Kanchanaburi
Timing hikes to Erawan's upper tiers
A cell over the upper catchment turns trails dangerous within 20-30 minutes as water level rises. Checking the radar before entering the upper sections is basic safety.
Planning Death Railway excursions toward Nam Tok
Landslides close the line after heavy rain. Checking the radar before a day trip tells you whether the mountain sections are in a rain band.
Managing tour departures from the River Kwai hotel strip
Raft house operators monitor upstream cells before letting guests onto the water. A storm 20km upstream can raise the river at the rafts within an hour.
Kanchanaburi Rain Radar: Frequently Asked Questions
- How often does the RainViewer map update for Kanchanaburi?
Every 5 minutes. During flash flood risk periods - when mountain rain can reach valley rivers in under an hour - this frequency provides the earliest practical warning.
- Can RainViewer show me rain falling in the mountains near the Myanmar border?
The radar network covers most of the Tenasserim Hills area. Rain falling in the upper Kwai catchment is visible on the map, which is what matters for downstream flood awareness.
Track Rain in Kanchanaburi in Real Time
See mountain rain before it reaches the river
Kanchanaburi's rain starts in the Tenasserim Hills and arrives at the valley without warning. The map updates every 5 minutes - often 2-5 minutes faster than other apps - so by the time a cell is hitting the upper Kwai catchment, you've already seen it before the water starts rising at the trails or the raft houses.
RainViewer Essential gives you:
A 2-hour rain forecast in 5-minute slices
Not hourly blocks, so you can see the exact window when the mountain storm clears and the Erawan upper tiers or Death Railway route are safe again.
Rain alerts that trigger before rain arrives
Set the Erawan upper catchment, your River Kwai raft house, or the Route 323 mountain section and get notified while you can still change your plans.
Direction arrows on the map
So even when the animation is unclear, you can see whether the cell is tracking down the Kwai Noi valley toward the tourist strip or pushing east toward Suphan Buri.
48 hours of radar history
See how yesterday's mountain storm moved through the Tenasserim Hills and recognise the same pattern building upstream today.
Multiple locations
Track rain at the Erawan upper catchment, the Bridge on the River Kwai, and your Route 323 return drive at the same time.
A 7-day forecast tells you August will be wet. RainViewer tells you whether the upper catchment is clear enough to hike to tier seven or turn back now.
Track rain in Kanchanaburi - free
Upgrade to Essential for alerts, forecasts, and full radar history
