Verdict: Fair month
Colombo Weather in August
August runs warm in Colombo, with daily highs around 29°C (84°F) and nights near 25°C (77°F). It's also the wet side of the calendar: rain falls on about 29 days, so build flexibility into plans. August is workable in Colombo if your dates are fixed — just plan around the conditions.
Average high
29°C / 84°F
Average low
25°C / 77°F
Rain days
~29
Precipitation
257 mm
What to pack for Colombo in August
- Summer clothes, plus one light layer for air-con and evenings
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 29 days
- Quick-dry shoes — downpours are short but heavy
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Colombo: Feb (31°C / 88°F) · Coolest: Sep (28°C / 82°F) · Wettest: May (~30 rain days)
30°
23°
Jan
31°
23°
Feb
31°
24°
Mar
31°
25°
Apr
30°
25°
May
29°
25°
Jun
29°
25°
Jul
29°
25°
Aug
28°
25°
Sep
28°
24°
Oct
29°
23°
Nov
29°
23°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)