Weather in Apia in August

A good month. August is a solid month to be in Apia. Highs average 28 °C, lows 26.2 °C, and rain falls on 14 days — nothing in the month is working against you.

Apia barely has seasons. August scores 72 out of 100 against a best of 72 in August — a gap small enough that the month you choose matters far less here than the week you choose.

This is persistent light rain rather than storms: 14 wet days but only 1 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

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 — 1.7 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 29.6 °C and the coldest night fell to 23.9 °C.

August is moderately variable: 8 mm in the driest year against 142 mm in the wettest, around an average of 56 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind sits around 19.1 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 27.9 °C in July, 28 here, 28.3 in September. Nothing about the timing within the month matters much.

Daylight in August

Apia sits close enough to the equator that daylight barely moves all year — 11.6 hours in August, against a range of just 1.6 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 27.8 °C in August — warm enough that the water offers no relief from the heat. The sea peaks at 29.5 °C in March and bottoms out at 27.8 °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

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, September is the trade worth considering — 8 points weaker on weather, and materially quieter.

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

August in Apia versus nearby

If Apia is one option among several, the nearby comparison is worth making. Nuku‘alofa is close enough to be a coin toss — 5 °C cooler, the same number of rain days. Avarua is close enough to be a coin toss — 4.5 °C cooler, 2 days less rain.

So: August is the answer for Apia. If it is booked out or priced out, July is the next best thing at 4 points behind, and February is the month to keep off the shortlist.

Every month in Apia

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