Alleppey (Alappuzha) weather in August
August in Alleppey: hot, soaked, with muggy air — a gamble, with 29 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#10 of 12 months in Alleppey · #1173 of 1413 destinations to visit in August · comfort 55/100 (tier D)
- Days
- 28°C
- Nights
- 24°C
- Wet days
- 29
- Sun
- 7.3 h
- Humidity
- 90%
- Daylight
- 12 h

Traveller notes on Alleppey in August
Forum posters commonly describe August as monsoon-season Kerala with mild rains, framing it as an improvement once the heaviest June-July downpours have passed - but the real monthly data doesn't support August being genuinely milder: rainfall volume and rainy-day counts in August essentially match July's peak here, not a noticeable step down. Posters are right that houseboat cruises through the Alleppey backwaters keep running through the monsoon regardless - operators typically only pause for genuinely heavy wind, not for rain itself - and that the monsoon's lush, dramatic atmosphere is part of the backwaters' appeal for many visitors. Posters consistently recommend waterproof clothing, a good umbrella and sturdy, quick-drying footwear, along with a flexible itinerary that can absorb a rained-out plan without much disruption.
Other months in Alleppey
Regulars are specific this counts as the tail end of the monsoon here, the later in the month a trip lands the drier conditions tend to be, mornings and nights staying cool while daytime turns properly sunny and hot along the backwaters. Our row backs that hot, genuinely wet read, 28.9C reading as a scorching 35C, over 24.2C nights feeling 29C, with a substantial 199.8mm of rain across 19.9 days and humidity at 87 percent. Regulars are consistent coastal daytime temperatures commonly cited in the 30 to 36C range, the backwaters themselves warm and humid but described as genuinely relaxing despite that. Real air quality is also worth factoring in this time of year given regional conditions. The sea sits at a warm, swimmable 30C. The record: 8.5 hours of sun, a 7.8 kph wind and AQI 88.
Regulars are blunt about this month: hot and humid, especially by mid-April, with the backwaters offering little natural shade of their own. Our row backs the intensity, 32.3C reading as a real 39C at 79.7 percent humidity, over 26.1C nights, with 160.9mm of rain across 25.3 days already signalling the approach of the monsoon. On the water itself, though, more than one houseboat traveller describes a steady breeze that keeps a covered deck comfortable through the day despite the heat on land. The practical advice for a houseboat booking is to check the air-conditioning tier carefully: premium boats typically cool the bedroom only overnight, while luxury boats run it around the clock. The sea off this coast holds a very warm 30.7C. The record: 10.7 hours of sun, an 11.5 kph wind and AQI 94.
March starts the Kerala hot season and regulars do not soften it: 24 to 35C with humidity around 80 percent, and walking a town in it means moving shade to shade. Our row reads 32.8C over 25.7C nights, which the humidity turns into 39C and 31C. What makes the month work here is the thing people come for anyway - on a houseboat under way you do not feel it, because the movement and the water do what no amount of shade ashore can. Rain is not yet a factor: 63mm across 13.6 days. The figure worth checking before a long stay is the air: AQI 105, the highest in this batch by a wide margin. The record: 10.9 hours of sun, a 12.6 kph wind and a 30.1C sea.
November to February is the Kerala season and December its peak, which regulars translate into one instruction: book the houseboat months ahead, because the good ones are gone and last-minute is luck rather than choice. Crowds are the corresponding cost. On weather they describe the dry season beginning, and our row suggests beginning rather than begun - 74.6mm across 10.1 precipitation days is about seven millimetres a wet day, the tail of the northeast monsoon still working through the first half of the month. The other thing the row shows is stillness: 29.5C at 82 percent humidity with an 8.2 kph wind reads as 35C, and the nights at 23.9C feel like 29C. The backwaters are sultry, not breezy. The record: 9.7 hours of sun, a 29.6C sea and AQI 92.
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Alleppey climate normals — August
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Alleppey in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsNehru Trophy Boat Race, Onam, school holidays in 4 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Alleppey's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherAlleppey's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Alleppey in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Southwest monsoon
1 Jun – 15 Sep · usuallyRiskThe rains hit the Kerala coast first, usually in the opening days of June, and the backwaters run high and brown. Half the houseboats tie up; the ones still sailing cost a third of the winter rate.
- Season
Karkidakam ayurveda season
16 Jul – 16 Aug · usuallyMonsoonThe Malayalam month the resorts sell as the right time for a treatment course, on the reasoning that the damp opens the pores. Packages run two weeks or more and are at their cheapest. Source ↗
- Festival
Nehru Trophy Boat Race
5–31 Aug · usuallySporting eventCrowdedBook earlyHundred-foot snake boats with a hundred rowers apiece, raced across Punnamada in front of a packed pavilion. The date is set only a few months ahead — long the second Saturday of August, lately later in the month. Source ↗
- Holiday
Onam
17–26 AugSchool holidaysClosuresCrowdedKerala's ten-day harvest holiday: flower carpets at every doorway, a sadya eaten off a banana leaf, and village boat races in the canals. Shops and offices close for the last four days. Source ↗
- Season
Wet season
MonsoonRisk29 rainy days and about 411 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Alleppey — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Alleppey?
Alleppey in August — FAQ
- Is August a good time to visit Alleppey?
- August in Alleppey: hot, soaked, with muggy air — a gamble, with 29 rainy days. It ranks #10 of 12 months for Alleppey on SeasonMap's comfort score (55/100).
- What is the weather like in Alleppey in August?
- In August, Alleppey averages a daily high of 27.9°C and a low of 24.3°C, with about 410.5 mm of rain over roughly 29 rainy days.
- What is the air quality in Alleppey in August?
- Alleppey has a mean US Air Quality Index of about 53 in August.
Within 300 km: Kochi's Onam on 17–26 Aug, and Varkala's Cliff shuts for the monsoon around 25 May – 15 Sep.