Weather in Leiria in August

Prime time. August is about as good as Leiria gets. Highs average 30.2 °C, lows 16.5 °C, and rain falls on 2 days — nothing in the month is working against you.

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

Rain falls on only 2 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 30.2 °C days and 16.5 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 14 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest August day reached 41.6 °C and the coldest night fell to 12.1 °C.

This is the volatile part. August rainfall has ranged from 0 mm to 42 mm across the twenty years measured — a 42 mm spread around an average of 10 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 is light at 8.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 67%.

How August sits in the year

Temperatures hold steady either side: 29.4 °C in July, 30.2 here, 28.3 in September. Nothing about the timing within the month matters much.

Daylight in August

13.8 hours of daylight, losing 1.1 hours across the month. That is between Leiria's extremes of 15 and 9.4 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 19.9 °C in August — swimmable, but it takes a moment to commit. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, April is the trade worth considering — 11 points weaker on weather, and materially quieter.

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

August in Leiria versus nearby

If Leiria is one option among several, the nearby comparison is worth making. Aveiro is a better bet in August — 3.4 °C cooler, 1 day more rain. Lisbon is a better bet in August — 7.2 °C cooler, 1 day less rain.

So: August works, with June the better month by 10 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Leiria

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