Pattaya Flooding: Recent Events, Drainage & Prevention
A measured look at Pattaya's recurring rainy-season flooding — which soi and roads tend to flood, what the municipal prevention project has (and has not) delivered, and how to plan around the risk.
Pattaya floods on a predictable grid of low-lying roads each rainy season. The city sits on a flat coastal plain between the Gulf and the hills behind Pratumnak and Khao Noi; a smaller drainage project is under way after the original municipal proposal could not be funded; and residents still regularly question what it takes to clear a one-hour thunderstorm. This page is a measured record of which stretches flood, what the city has done about it so far, and how to plan around the risk.
Depth figures throughout are reporter and resident observations, not instrumented measurements. The local press tends to describe severity as “vehicles stalled”, “small cars unable to pass” and “water rose rapidly” rather than publish cm figures, and we have kept to the same language here.
Recent events
| Date | Affected roads | Duration | What happened |
|---|---|---|---|
| 14 May 2026 Source: Pattaya Mail | Soi Khao Noi, Soi Khao Talo, South Pattaya Sukhumvit, Third Road, and the railway parallel road behind Wat Tham Samakkee | More than an hour of thunderstorms | Residents reported water levels rising rapidly; smaller vehicles were unable to pass and some engines stalled. |
| 3 May 2025 Source: Nation Thailand | Pattaya Third Road (described as a low-lying zone); the railway road leading to Khao Talo | Over three hours of thunderstorms (early Saturday morning) | Local authorities urged drivers to avoid flooded streets; several vehicles were damaged. |
Shorter nuisance floods are more frequent than the events above and typically clear within an hour or two of the rain stopping. The reported stretches are a reliable guide to where to avoid staying or driving during a heavy afternoon storm.
The municipal prevention project
| Measure | Figure |
|---|---|
| Original proposed budget — Pattaya | 6 billion THB |
| Original proposed budget — Banglamung district (separate) | 20 billion THB |
| Status of the original budget (2023) | Encountered setbacks due to financial constraints; the original plan could not proceed |
| Total project scope (as approved and under way) | Approximately 6.8 km, from Soi Wat Boonsamphan to Huay Yai |
| First-phase scope (drainage pipes) | Ban Nern Rod Fai to Naklua canal |
| First-phase completion rate (as quoted October 2023) | ~90% (per Mayor Poramet Ngamphichet) |
| Project completion target | 2026 (per the mayor's October 2023 statement) |
| Typical drain-down time once rain subsides | 1 to 2 hours (into the sewage system) |
| Pattaya City flood hotline | 1337 (24-hour) |
The 6 and 20 billion baht figures were the original proposal, which Pattaya Mail reported as unable to proceed. The 90% figure and the 2026 target are from a Pattaya Mail interview with Mayor Poramet Ngamphichet published 13 October 2023; we have not seen a 2026 progress-update that confirms or revises them. The affected roads above continued to flood through 2025 and 2026.
Frequently asked questions
Related guides
- Pattaya weather month by monthSeason-by-season climate guide
- Moving to Pattaya hubVisa, costs, housing and schools in one place
- Safety in PattayaScams, traffic and everyday risks
- Pattaya areas comparedCentral, Jomtien, Pratumnak and more — which best fits you
- Best time to visit PattayaPlan around the rainy season
Sources
- Pattaya Mail — Pattaya mayor optimistic as flood prevention project nears completion (13 Oct 2023)
- Pattaya Mail — As Pattaya is tested by Wipha, city ramps up flood prevention with major drainage cleanup (22 Jul 2025)
- Pattaya Mail — Heavy rain floods Pattaya again as residents question endless drainage problems (15 May 2026)
- Nation Thailand — Pattaya flooding event, early May 2025