Weather in Byron Bay in August

Prime time. August is about as good as Byron Bay gets. Highs average 20.1 °C, lows 16.8 °C, and rain falls on 6 days — nothing in the month is working against you.

August is the highest-scoring month of the twelve. The nearest rival is September, and the month at the other end of the year is March.

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. 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 — 3.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 25.4 °C and the coldest night fell to 11.6 °C, and the wettest single day dropped 44 mm — roughly 85% of the month's rain in one day.

This is the volatile part. August rainfall has ranged from 2 mm to 175 mm across the twenty years measured — a 173 mm spread around an average of 52 mm. The average is real but almost no individual August looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind sits around 19.2 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 69%.

How August sits in the year

Temperatures hold steady either side: 19.6 °C in July, 20.1 here, 21.5 in September. Nothing about the timing within the month matters much.

Daylight in August

11.1 hours of daylight, gaining 0.7 hours across the month. That is between Byron Bay's extremes of 13.9 and 10.3 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 21.5 °C in August — comfortable for a proper swim. The sea peaks at 26.5 °C in February and bottoms out at 21.5 °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, May 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 Byron Bay versus nearby

If Byron Bay is one option among several, the nearby comparison is worth making. Brisbane is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Coffs Harbour is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: August is the answer for Byron Bay. If it is booked out or priced out, September is the next best thing at 1 points behind, and March is the month to keep off the shortlist.

Every month in Byron Bay

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