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Last update: 07:30, 13 Nov 2026
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Check the sky before your longtail to Railay. Live Ao Nang rain radar, updated every 5 min. Free on iOS & Android.
Ao Nang is a limestone-framed beach town on the Krabi coast, and in the wet season a squall can end the longtail boats to Railay in minutes. Rain comes from the southwest monsoon across the Andaman Sea, and an Ao Nang rain radar shows whether the next band reaches Nopparat Thara Beach or passes out to the islands. Hyperlocal radar shows where the rain is and where it is heading.
The town sits under steep limestone cliffs that lift moist air and stall storms on the coast, with Phi Phi and Hong Island offshore. A cell can soak Ao Nang while Krabi Town 20 kilometres inland stays dry. A standard forecast for Krabi province averages that difference away, which is where a live radar helps.
RainViewer shows precipitation over Ao Nang with data from the Thai Meteorological Department, the national weather service. The live rain map refreshes about every 5 minutes, so it shows whether the band over the Andaman Sea is moving towards the beach.
RainViewer shows Thai precipitation using data from the Thai Meteorological Department (TMD), the national weather service, which operates a network of weather radars across the country. The map refreshes with each new scan, about every 5 minutes. From Ao Nang the map also covers Krabi Town, Railay and Phang Nga Bay.
Heavy rain and big swell close the sea to most boats, and Railay's West Beach and Phra Nang Cave Beach can be cut off by rough water. September and October bring the heaviest rainfall.
Thunderstorms build in the heat and linger as the monsoon ends. Mornings may be clear and afternoons stormy, which catches climbers and kayakers.
Skies are clear and the sea is calm, which is peak season for Railay climbing and Hong Island tours. Rain is rare but short showers still come through.
Longtails to Railay leave from Ao Nang Beach and Nopparat Thara, and rough water stops them. Check the radar before queuing at the beach.
Climbers on Railay's limestone walls need dry rock, and a shower makes the holds slick. The radar shows the next dry window.
Speedboats to Phi Phi and the four-island trips cancel in rough weather. Watch the band and choose the day.
The night market stalls and the beach road cover little in a downpour. Time the walk to the gap between cells.
The 1,237 steps to Tiger Cave Temple and the path to Emerald Pool Krabi are slick in the rain. Wait for the cell to clear.
Heavy rain and big swell in the southwest monsoon stop longtails to Railay and speedboats to Phi Phi, and cancellations peak in September and October. Bands cross the sea in waves. RainViewer shows whether one is on the route.
Yes, heavy rain slows the road between Ao Nang and Krabi Town and causes surface water at the low junctions. Trucks and minibuses queue behind it. Check the radar before leaving.
Yes, heavy rain can flood the beach road and the low streets near Nopparat Thara, and runoff drops from the limestone cliffs. Drains are overwhelmed in the first hour. Avoid the beach road during the downpour.
December to March is the driest and calmest, which suits Railay climbing and island tours best. May to October is the wettest, with September and October the worst. April is hot with short storms.
Limestone cliffs lift moist air from the Andaman Sea and stall storms on the coast, so Ao Nang can be soaked while Krabi Town inland stays dry. A hyperlocal radar shows that split.
RainViewer shows live precipitation over Ao Nang using Thai Meteorological Department radar data, refreshed about every 5 minutes. It shows rain as it falls, not a modelled prediction, and is a hyperlocal radar for the coast.
Yes, a rain alert warns you minutes before rain reaches a saved place such as Ao Nang Beach or Railay pier. The 5-minute forecast timeline shows the next two hours. That settles whether to board the longtail.
A longtail to Railay and a climb on its limestone walls both depend on a dry gap, and RainViewer shows the next one.
Rain reaches Ao Nang in bands off the Andaman Sea, and the gap between two bands is the window that matters.
RainViewer Essential gives you:
Two hours of 5-minute steps let you time the boat to Railay.
Put an alert on Ao Nang Beach. RainViewer warns you minutes ahead, which settles whether to queue for the longtail now.
Rain reaches Ao Nang most often from the south-west across the Andaman Sea, so the arrows show whether a band heads for the cliffs.
The 48-hour history shows what fell on the Krabi hills, which explains why the Emerald Pool path is wet.
Track Ao Nang, Railay and Krabi Town at once.
Your weather app says showers for Krabi this afternoon. A live hyperlocal radar shows the band is already over Ao Nang while Krabi Town is dry, and that decides the longtail.