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Live rain radar for Ranong, 5-min updates. See southwest monsoon squalls before they cancel the Ko Phayam ferry or close the Highway 4 mountain sections. Free.
Rain in Ranong follows the SW dominant monsoon pattern that defines most of southern Thailand. Wet season runs May–October (extremely wet), when afternoon convective storms develop with little warning and can deliver intense rainfall in short bursts. The key risk is not just getting wet — it's the knock-on effects: intense flash floods from the highest annual rainfall in Thailand, road closures on Highway 4 mountain sections, disruption to Koh Chang Noi and Ko Phayam ferries. Local residents have learned to check real-time conditions before making decisions, because a regional forecast from the morning is useless when a cell is forming 20km away.
Ranong is a province where tourists heading to Ko Phayam and travellers on the Bangkok–south corridor The difference between knowing rain is 15 minutes away versus learning about it when you're already in it is the difference between a managed disruption and a genuine problem.
RainViewer shows you exactly which part of Ranong is in the rain right now — not a provincial average, but street-level precision updated every 5 minutes.
RainViewer combines signals from radar stations across the region to give Ranong a single, continuous map. From here, you can also track rain developing in Chumphon, Phang Nga, Surat Thani — useful if you're taking ferries to Ko Phayam or Ko Chang Noi, or driving the narrow coastal highway section.
Afternoon and evening storms drive the season. Peak intensity typically falls in August–September for most of Thailand, with the key variation being how terrain shapes local delivery. Cells can be intense and short-lived or slow-moving and sustained.
These are the months where forecast reliability drops most sharply. May often brings the first events of the season before residents have recalibrated from the dry months. October is when the monsoon exits — sometimes quickly, sometimes with a last burst of intense rain. Real-time radar is more useful than any extended outlook in these months.
Rainfall drops to minimal levels. When a stray shower does appear, it's visible on the radar well before it arrives.
Whether you're working outdoors, travelling, or timing an event in Ranong, knowing whether a cell will reach your location in the next 30–60 minutes is the single most useful piece of information you need.
The road network in Ranong is affected by intense flash floods from the highest annual rainfall in Thailand, road closures on Highway 4 mountain sections, disruption to Koh Chang Noi and Ko Phayam ferries. Seeing the rain band's current position and direction on the map changes departure decisions.
Farming communities in Ranong time planting, spraying, and harvest operations around rain windows. A radar alert 20–30 minutes before a cell arrives gives just enough time to act.
Whether you're commuting through or visiting the area around Ko Phayam ferry pier, Highway 4, Ranong River, the live radar shows exactly which streets are in the rain and which are still dry — not a regional smear.
From outdoor markets to construction sites to school pickups, Ranong residents use real-time radar to make the same decisions they'd make anywhere in Thailand: wait, move, or reroute.
Every 5 minutes, drawing from Thai Meteorological Department radar networks. During active storm periods when conditions change fastest, you're seeing the map update as each radar sweep completes.
Yes. Set your home, work, or any location in Ranong and receive a push notification when rain is approaching — with enough lead time to adjust your plans. You can also set a custom intensity threshold so light drizzle doesn't trigger an alert.
RainViewer draws directly from the same radar networks used by the Thai Meteorological Department, preserving the original resolution rather than smoothing it into regional averages. For Ranong, this means you can see which street is in the rain and which is still dry.
See rain in Ranong before it reaches your street
Whether you're managing logistics, timing an outdoor activity, or just deciding whether to leave now or in 20 minutes, RainViewer gives you the precision that generic weather apps don't. Street-level radar, 5-minute updates, and alerts that arrive while you can still act.
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