Weather in Galle in August

How August compares

August is the 11th warmest month of the year in Galle and ranks 90th of 134 destinations we compare for August - see where else is hot in August. Against London's average high of 21.4°C in August, Galle is 6.4°C warmer by day and 11.4°C warmer at night.

Daytime and night-time in August

The typical August day in Galle peaks at 27.8°C, but that is an average: the warmest 10% of days reach 28.6°C or more. About 100% of days top 25°C. Nights average 24.9°C; one night in ten drops to 24.2°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 29.5°C (2019-08-03) and the coldest night 23.5°C (1993-08-28).

Rain in August

Wet (more than 8 rainy days): about 30 days with 1 mm or more, 244 mm in total. Year to year it varies a lot - the wettest August was 2019 with 473 mm, the driest 2005 with 154 mm. Humidity averages 86%.

Sea temperature in August

The sea averages 27.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.6°C to 28.0°C. For the warmest sea here, come in April (29.5°C).

Sunshine and daylight

Around 1.9 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 06:04 and sets about 18:23 local time in mid-August. Average cloud cover is 84%.

Is August a good time to visit Galle?

It is a reasonable choice: hot days but expect showers. The best months for Galle on our scoring are March, February, January; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Steady warmth, with humid evenings

August is relatively cool by Galle's standards, yet it will still feel hot coming from the UK. Average daytime highs are 27.8°C, compared with London's 21.4°C, and humidity is 86%. The catch is less about extreme afternoon temperatures than persistent warmth: nights average 24.9°C, so evenings are not much of a cooling-off period. Pack loose, lightweight clothes and look for accommodation with cooling you can rely on. Take breaks around midday if the humidity feels tiring. This weather suits travellers comfortable with warm, damp conditions better than anyone who needs crisp evenings or cool nights to sleep well.

Rain is a regular part of the holiday

With about 30 rainy days, wet weather needs to be part of your plans rather than treated as an occasional interruption. Sunshine averages just 1.9 hours out of 12.2 hours of daylight, so long daylight hours do not translate into long sunny spells. Keep outdoor plans movable, carry rain protection and pack clothes that dry readily. Do not base the trip on an assumption that rain will always clear quickly or arrive at a convenient time. August can work if you are happy to adapt each day, but it is a poor fit for a holiday built around reliable sunbathing.

Warm sea, but weigh up the long journey

The sea averages 27.4°C, making water temperature a clear reason to consider August if you enjoy swimming. That warmth does not establish how calm the sea will be, so judge conditions locally before getting in. For a UK traveller, the bigger decision is how much the weather matters after a flight from London of about 11 h 48 min. If swimming in warm water and avoiding cool weather are enough, August has something to offer. If dependable sunshine is the main reason for travelling so far, the frequent rain and limited sunshine make it harder to recommend.