🌊 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 Phuket Chiang Mai Pattaya Hua Hin Chonburi Krabi Koh Samui (Surat Thani)Chiang Rai

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

L4High — significant 2011 + recurring waist-deep flooding0

L3Moderate — neighborhood-level flooding common0

L2Low — occasional puddling0

L1Very low — central elevated0

* 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.

District

Flood risk

Tracked condos

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.