Weather in Krabi in August

Shoulder season. August is shoulder season in Krabi — cheaper, quieter, and a genuine gamble. You should expect rain on 24 days of the month, which is more days wet than dry.

August ranks 5 of 12 in Krabi: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain on 24 of the month's 31 days, 9 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average August reaches 30 °C; the day barely swings — 2.2 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 30.4 °C and the coldest night fell to 24.3 °C, and the wettest single day dropped 71 mm — roughly 26% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 391 mm against 146 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 277 mm average is a reasonable planning figure, not a promise.

Wind is light at 7.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 28.5 °C.

How August sits in the year

Temperatures hold steady either side: 28.5 °C in July, 28.5 here, 28.3 in September. Nothing about the timing within the month matters much.

Daylight in August

Krabi sits close enough to the equator that daylight barely moves all year — 12.4 hours in August, against a range of just 0.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 29.6 °C in August — warm enough that the water offers no relief from the heat. The sea peaks at 30.4 °C in May and bottoms out at 28.6 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Krabi versus nearby

If Krabi is one option among several, the nearby comparison is worth making. Surat Thani is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Hat Yai is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: August is a compromise. February is 26 points better and is what Krabi is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Krabi

See all twelve months in Krabi, or where else to go in August.