Track rain across Prachuap Khiri Khan in real time with Rain Viewer, a hyperlocal rain radar app, updated every 5 minutes, street by street.
Prachuap Khiri Khan is the narrowest part of mainland Thailand — at its waist near the Burmese border, the country is only 10km wide. This geography puts the province in an unusual dual-exposure position: southwest monsoon rain arrives from the Gulf side May to October, and a tail of the northeast monsoon reaches the coast from November to December.
Hua Hin is Bangkok's closest beach resort and attracts enormous weekend traffic. The Saturday afternoon storm that floods Hua Hin's main street during monsoon season affects thousands of visitors who drove down from Bangkok that morning. A radar check before the drive south changes how the day is planned.
Primary wet season, afternoon storms.
Lighter secondary wet period.
Peak tourist season for Hua Hin, minimal rain.

One tap, and the rain at that precise spot tells its own story—showing intensity, precipitation type, cloud and air temperatures, and live national alerts, while making even the smallest rain pockets easy to identify and compare.
A cell sitting over Hua Hin on arrival means a flooded main street. Checking the radar before departure shows whether the Saturday window is clear.
The park's caves and trails require dry conditions. Checking the radar before driving south from Hua Hin avoids arriving at a flooded cave entrance.
During October–December, the transition between southwest and northeast rain creates unpredictable conditions on the coastal highway.
Rain Viewer combines Gulf coast radar for Prachuap Khiri Khan. You can track rain in Chumphon, Phetchaburi, and offshore Gulf areas.
“A little overenthusiastic at times with rain predictions, but it's accurate and spot on for radar images, and it's the one radar app I've kept and not uninstalled”
Duncan Stewart
I must update my feedback once again – this is still the best brain app in the app store. The issue I was experiencing was with my phone, not this top-tier app. One feature I particularly like is the widgets.
Jim Tigs
Every 5 minutes.
Yes — January through April is the most reliable dry period and Hua Hin's peak tourist season. The dual-monsoon exposure means the wet window extends longer than most of central Thailand.
Prachuap's rain comes from two directions and doesn't follow Bangkok's weekend forecast. The map updates every 5 minutes — often 2–5 minutes faster than other apps — so by the time a Gulf cell is forming off Hua Hin, you've already seen it before you leave the city.
Rain Viewer Essential gives you:
A 7-day forecast tells you October will be unpredictable. Rain Viewer tells you whether the drive south is worth it today or better left to Sunday.
Track rain in Prachuap Khiri Khan — free
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