🌊 Bangkok Flood Risk Map
Which Bangkok districts flood every monsoon season, which stay dry. Verify before you buy. Built from BMA Drainage Department + JICA reports + 2011 great flood inundation records.
Bangkok districts by flood risk
| District | Flood risk | Tracked condos |
|---|---|---|
| Bang Khen | L5 | 25 |
| Bang Khun Thian | L5 | 16 |
| Don Mueang | L5 | 28 |
| Khlong Sam Wa | L5 | 3 |
| Lak Si | L5 | 27 |
| Lat Krabang | L5 | 20 |
| Min Buri | L5 | 23 |
| Nong Chok | L5 | 2 |
| Sai Mai | L5 | 20 |
| Bang Bon | L4 | 7 |
| Bang Khae | L4 | 26 |
| Bang Phlat | L4 | 22 |
| Bueng Kum | L4 | 27 |
| Khan Na Yao | L4 | 26 |
| Nong Khaem | L4 | 13 |
| Prawet | L4 | 29 |
| Saphan Sung | L4 | 12 |
| Taling Chan | L4 | 4 |
| Thawi Watthana | L4 | 0 |
| Bang Kapi | L3 | 30 |
| Bang Kho Laem | L3 | 24 |
| Bang Na | L3 | 23 |
| Bang Sue | L3 | 25 |
| Bangkok Noi | L3 | 25 |
| Bangkok Yai | L3 | 23 |
| Chatuchak | L3 | 39 |
| Chom Thong | L3 | 22 |
| Khlong San | L3 | 15 |
| Lat Phrao | L3 | 26 |
| Phasi Charoen | L3 | 23 |
| Phra Khanong | L3 | 20 |
| Rat Burana | L3 | 17 |
| Suan Luang | L3 | 17 |
| Thon Buri | L3 | 21 |
| Thung Khru | L3 | 16 |
| Wang Thonglang | L3 | 22 |
| Yan Nawa | L3 | 22 |
| Din Daeng | L2 | 10 |
| Dusit | L2 | 13 |
| Huai Khwang | L2 | 75 |
| Khlong Toei | L2 | 37 |
| Phaya Thai | L2 | 47 |
| Phra Nakhon | L2 | 8 |
| Samphanthawong | L2 | 6 |
| Watthana | L2 | 0 |
| Bang Rak | L1 | 30 |
| Pathum Wan | L1 | 88 |
| Pom Prap Sattru Phai | L1 | 5 |
| Ratchathewi | L1 | 30 |
| Sathorn | L1 | 0 |
Flood risk is rated L1 (lowest) to L5 (highest) from Bangkok’s district flood model. See how we score flood risk.
Bangkok condo inventory — flood risk distribution
0buildings (0%)in Level 4–5 high-risk zones· 1,296/1,296 buildings
Conversely, only 0 (0%) are in Level 1–2 safe zones.
L5Severe — repeat full-area inundation in monsoon0
0%
L4High — significant 2011 + recurring waist-deep flooding0
0%
L3Moderate — neighborhood-level flooding common0
0%
L2Low — occasional puddling0
0%
L1Very low — central elevated0
0%
* 1,296 buildings excluded from analysis (khet ↔ flood data unmatched)
Bangkok monsoon flood risk
L5 Severe — repeat full-area inundation in monsoon
L4 High — significant 2011 + recurring waist-deep flooding
L3 Moderate — neighborhood-level flooding common
L2 Low — occasional puddling
L1 Very low — central elevated
Source: BMA Drainage Dept + JICA reports + 2011 great flood. District (khet) baseline, not coordinate level. Local variation exists.
Why district-level?
BMA does not publicly release block-level flood GeoJSON. District-level baseline is enough for macro risk decisions. Within a district, road elevation and drainage still vary — site visits before purchase.
Refresh cadence
Once a year (after BMA monsoon report). New drainage tunnel / pump station news triggers a re-score for that district.
Bangkok flood risk — frequently asked questions
- Which Bangkok districts have the highest flood risk?
- Districts rated Level 4–5 (highest risk) include Bang Khen, Bang Khun Thian, Don Mueang, Khlong Sam Wa, Lak Si, Lat Krabang. These areas experienced sustained inundation during the 2011 great flood and face recurring monsoon flooding. Each condo page shows its district's exact flood level.
- Which areas of Bangkok are safe from flooding?
- Districts rated Level 0–1 (lowest risk) include Bang Rak, Pathum Wan, Pom Prap Sattru Phai, Ratchathewi, Sathorn. These areas have elevated terrain and robust BMA drainage infrastructure. Pathum Wan (Siam/Phloen Chit), Watthana (Asok/Phrom Phong), and Bang Rak (Silom) are typically the driest zones.
- How is Bangkok flood risk measured?
- RealData assigns each of Bangkok's 50 khet (districts) a flood risk level from 0 to 5 using three primary sources: BMA (Bangkok Metropolitan Administration) Drainage Department records, JICA flood frequency reports, and 2011 great flood inundation maps. Level 0 = no observed flooding; Level 5 = repeat full-area inundation during monsoon season. The layer is reviewed annually after each BMA monsoon report.
- Did the 2011 Bangkok flood affect all areas of the city?
- No. The 2011 great flood primarily affected outer districts north and east of Bangkok — including Lak Si, Don Mueang, Lat Phrao, Nong Chok, and Khlong Sam Wa — which saw waist-deep flooding lasting weeks. The central business districts (Silom, Sukhumvit, Siam) were largely protected by elevated terrain and the King's Dyke flood barriers. RealData's flood risk model is calibrated against these 2011 records.
- Is Sukhumvit safe from flooding in Bangkok?
- Sukhumvit spans multiple districts with varying flood risk. Lower Sukhumvit (Khlong Toei, Watthana — BTS Asok to Phrom Phong area) carries Level 1–2 risk and stayed dry in 2011. Upper Sukhumvit extending toward On Nut, Phra Khanong, and Bang Na has Level 2–3 risk with occasional street flooding during heavy monsoon rains. Check the individual building page for its exact district flood level.