Month guide · San Juan · Puerto Rico
San Juan in August
What August is really like in San Juan: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
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Quick answer
August is a quieter month with trade-offs. Expect average highs of 31°C (88°F), lows of 25°C (77°F), about 14 rainy days and roughly 12.7 hours of daylight. Hot, humid and showery, with hurricane risk building; check forecasts.
Key facts
- Average high / low
- 31°C (88°F) / 25°C (77°F)
- Rainy days
- About 14
- Daylight
- About 12.7 hours
- Sea temperature
- 29°C (84°F)
- Crowds
- Moderate
- Hotel prices
- Average
Weather in August
August is the 3rd-warmest month in San Juan: days average 31°C (88°F) against a yearly average high of 30°C (86°F), and nights fall to about 25°C (77°F). Rain falls on roughly 14 of its 31 days. Compared with July (31°C (88°F)), August is about as warm; by September highs stay near 31°C (88°F).
- Sunrise (15 August)
- About 06:06
- Sunset (15 August)
- About 18:52
- Daylight
- About 12.7 hours
- Sea
- 29°C (84°F)
Spring (March–May). Sunny and calm through April, with brief showers returning in May and prices easing.
Crowds and prices
On a 1–5 scale, August rates 3 for crowds (the peak is January at 5) and 3 for hotel prices (highest in January). Prices sit in the middle of the year's range.
Events in August
August has no major recurring festival in San Juan, which usually means easier bookings.
What to do in August
With frequent rain, plan around indoor sights and keep outdoor time flexible.
Neighbourhood · Old San Juan
Old San Juan streets and plazas
The old town's streets are paved with blue-grey adoquines, cast from furnace slag and said to have arrived as ships' ballast, and lined with balconied colonial houses in pastel colours.
- Time needed
- Half a day
- Cost
- Free
- Free
- Iconic
- Architecture
- Photo spot
- History
Market · Santurce
La Placita de Santurce
Visit twice: by day for a fresh juice and lunch, then late in the evening for the street party.
- Time needed
- 2–3 hours
- Cost
- Free
- Free
- Food
- After dark
- Iconic
Castle · Old San Juan
Castillo San Cristóbal
Completed in the 18th century to protect the city from land attack, San Cristóbal is described by the National Park Service as the largest fortification Spain built in the Americas.
- Time needed
- 1.5 hours
- Cost
- Low cost
- History
- Views
- Kids
- Architecture
Waterfront · Old San Juan
Paseo de la Princesa and Paseo del Morro
Walk it in the late afternoon, then enter the city through the San Juan Gate and climb up to the cathedral.
- Time needed
- 1 hour
- Cost
- Free
- Free
- Couples
- Views
- Outdoors
- After dark
The sea averages 29°C (84°F) — warm enough to swim. Best beaches near San Juan.
What to pack
For highs near 31°C, lows near 25°C and 14 wet days: light, breathable clothes, a sun hat and high-factor sunscreen; a compact umbrella and waterproof shoes — rain is frequent; comfortable walking shoes.
Is August a good time to visit San Juan?
A quieter month with trade-offs. If your dates are flexible, December–April are better overall. Compare every month.
San Juan in other months
Questions travellers ask
+Is August a good time to visit San Juan?
It is a quieter month with trade-offs. Hot, humid and showery, with hurricane risk building; check forecasts.
+How warm is San Juan in August?
Average highs are around 31°C (88°F) and lows around 25°C (77°F).
+Does it rain a lot in San Juan in August?
Expect rain on about 14 days of the month, so pack for wet weather.