Live Rain Radar for Nakhon Sawan

Track rain across Nakhon Sawan in real time with Rain Viewer, a hyperlocal rain radar app, updated every 5 minutes, street by street.

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Local Weather Context

Nakhon Sawan sits at a geographic inflection point: the Ping and Wang rivers meet here to form the upper Chao Phraya. What falls as rain in Nakhon Sawan — or upstream in Tak and Kamphaeng Phet — eventually reaches Bangkok. But locally, the confluence geography means heavy rain upstream arrives as river flooding days later, while a local storm can produce flash flooding within hours.

The province's agricultural core depends on timing the monsoon precisely. Rice farmers around Bueng Boraphet — Thailand's largest freshwater lake — track incoming cells not just for planting decisions but for fish pond management, where rapid water level changes can cause losses.

Rain Viewer shows you which cells are approaching the river basin now — not what the season looks like, but what the next two hours will bring.

Seasons

Wet season (May–October)

The southwest monsoon delivers most of the province's approximately 1,100mm annual rainfall between May and October. Storms tend to build in the afternoon. River levels rise steadily, with flood risk highest in September and October.

Transition months (May and October)

October is critical for harvest timing — rice fields in the lowlands need the rain to stop before cutting.

Dry season (November–April)

Rainfall is minimal. The Chao Phraya headwaters run lower.

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Use Cases

Timing rice harvest windows

Nakhon Sawan's flatlands produce rice in cycles tied directly to the monsoon calendar. Farmers cutting in late October need to see whether the afternoon cell will reach their fields before the cutting crew finishes.

Driving Highway 1 between Bangkok and Chiang Mai

Highway 1 runs through Nakhon Sawan. Sections in the floodplain between Chai Nat and Nakhon Sawan are subject to sheet flooding after heavy local rain. Freight drivers use radar to see which sections are currently in the rain band.

Protecting fish pond harvests at Bueng Boraphet

Commercial fish farmers time harvest operations around the rain. A sudden heavy cell can cause oxygen depletion. A 20–30 minute warning allows equipment to be secured.

Coverage

Rain Viewer combines central Thailand radar for Nakhon Sawan. From here, you can also track rain developing in Phichit, Kamphaeng Phet, and Chai Nat — useful if you're driving Highway 1 or managing water resources across the upper Chao Phraya basin.

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FAQ

How often does the Rain Viewer map update for Nakhon Sawan?
Every 5 minutes. During the critical August–September period, near-real-time radar data is more actionable than any forecast.
Can Rain Viewer help me understand upstream rain affecting the Chao Phraya?
Yes. The radar covers the Ping and Wang river catchments upstream in Kamphaeng Phet and Tak. Seeing heavy rain in those areas gives downstream managers in Nakhon Sawan advance notice.

See rain in Nakhon Sawan before it reaches your fields or your route

Nakhon Sawan's rain feeds the whole Chao Phraya system, but what matters locally is the next two hours — not the season. The map updates every 5 minutes — often 2–5 minutes faster than other apps — so by the time a cell is building over the Ping valley upstream, you've already seen it heading toward the confluence.

Rain Viewer Essential gives you:

A 2-hour rain forecast in 5-minute slices — not hourly blocks, so you can see the exact window when the afternoon storm passes and the harvest crew can finish the field
Rain alerts that trigger before rain arrives — set your rice fields, fish ponds at Bueng Boraphet, or Highway 1 departure point 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 upstream cell is tracking toward the confluence or pushing east toward Phichit
48 hours of radar history — see how yesterday's September storm moved through the Ping and Wang catchments and recognise the same pattern forming today
Multiple locations — track rain at your fields, the Bueng Boraphet shoreline, and the Highway 1 floodplain section at the same time

A 7-day forecast tells you October will be wet. Rain Viewer tells you whether the afternoon is clear enough to send in the cutting crew or hold until tomorrow.

Track rain in Nakhon Sawan — free

Upgrade to Essential for alerts, forecasts, and full radar history