Guanica Weather in August
August in Guanica brings very high temperatures, with highs of 31°C (88°F) and nights dropping to 25°C (77°F). Rainfall is on the higher side this month, averaging around 89 mm (3.5 in), so keep a rain jacket handy.
Rainfall in Guanica in August
This month experiences about 18 days of rain according to historical data, averaging 89 mm (3.5 in). This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Guanica in August
In August, Guanica sees very high temperatures, with highs of 31°C (88°F). Nights drop to around 25°C (77°F). For most visitors, the main thing to prepare for is the heat during the day. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about.For Guanica itself, January, February, March, April, May, November and December generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Guanica Temperature in August
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Guanica Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guanica - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Guanica typically stay consistent throughout August, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in August
Historical weather records for Guanica in August
Browse day-by-day weather records for Guanica spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guanica historical weather extremes in August
Based on 29 years of weather observations in Guanica between 1997 and 2026, these are the recorded extremes.
- The hottest August day on record in Guanica reached 36°C (97°F) (August 17, 2007).
- On August 26, 2006, Guanica saw its coldest August day with temperatures maxing out at 27°C (81°F).
- The lowest overnight temperature recorded in August was 21°C (70°F) (August 14, 2016).
Best Places in Puerto Rico in August
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Guanica in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
What To Do in Guanica in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Guanica 3-Day Forecast
See the full Guanica climate overview or explore weather in Puerto Rico.
Popular in August
Where to go in August - average daytime high across popular destinations.
San Juan
31°C (88°F) Rio Grande
31°C (88°F) Aguada
30°C (86°F) Rincon30°C (86°F) Luquillo30°C (86°F) Culebra30°C (86°F) Vieques30°C (86°F) Fajardo
30°C (86°F) 
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