San Juan weather in August
Hot and humid, with regular rainfall. Average highs of 31°C and lows of 25°C, with around 18 rainy days expected throughout the month.
While August isn't our top-rated month for San Juan, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
31°C
Average low
25°C
Rainy days
18 days
Best months to visit
Year-round
What to do in San Juan in August
Whatever the weather, San Juan rewards curious visitors. Here are some of the best ways to spend your time:
Old San Juan walking tours and colonial fort exploration
El Yunque waterfall hiking and rainforest bathing
Bioluminescent bay kayaking at night (Vieques)
Rum distillery tours and tasting at local distilleries
Beach days at Flamenco Beach (Culebra) via ferry
Salsa dancing lessons and nightclub experiences
What to pack for August
Light breathable clothing, high-SPF sunscreen, a wide-brimmed hat, and a reusable water bottle are essential. Pack sandals and at least one light layer for air-conditioned interiors.
Browse other months
January
28C
Warm and pleasant, with some rainy days.
February
28C
Warm and pleasant, with some rainy days.
March
29C
Warm and pleasant, with some rainy days.
April
30C
Hot and humid, with some rainy days.
May
31C
Hot and humid, with regular rainfall.
June
32C
Hot and humid, with some rainy days.
July
31C
Hot and humid, with regular rainfall.
August (you are here)
31C
Hot and humid, with regular rainfall.
September
31C
Hot and humid, with frequent heavy rain.
October
31C
Hot and humid, with frequent heavy rain.
November
29C
Warm and pleasant, with regular rainfall.
December
28C
Warm and pleasant, with regular rainfall.
Book your August trip to San Juan
Find hotels, tours and experiences for the perfect escape.
