San Juan Weather in August
During August, San Juan experiences high daytime temperatures of 30°C (86°F) and cooler nights around 25°C (77°F). As the wettest month of the year, expect frequent rainfall.
Rainfall in San Juan in August
The month is marked by heavy rainfall, often coming down in intense bursts. Make sure to have a poncho to stay dry. Typically, about 22 days will experience rainfall, with an average of 156 mm (6.1 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in San Juan in August
In August, expect high temperatures in San Juan, with highs of 30°C (86°F) and lows of 25°C (77°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 25°C (77°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in San Juan in August
There are approximately 215 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in August
With water at 28°C (82°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.August in San Juan has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
San Juan Temperature in August
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Water Temperature
28°C (82°F) *
Chance of Rain
74%
Precipitation
156 mm (6.1 in)
Rainy days
22 days
Humidity
84% *
Sunshine
215 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Juan typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in August
Historical weather for San Juan in August
Browse day-by-day weather records for San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Juan historical weather extremes in August
The extremes listed below come from historical weather data collected in San Juan from 2004 through 2025.
- The hottest August day on record in San Juan reached 39°C (102°F) (August 12, 2008).
- San Juan experienced its chilliest August day on August 3, 2022, reaching only 26°C (79°F).
- San Juan registered its coldest August night on August 31, 2011, with temperatures dropping to 19°C (66°F).
Best Places in Trinidad & Tobago in August
Find out more about the weather in Trinidad & Tobago and which places have the best travel conditions in this month. See all of Trinidad & Tobago in August →
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What to Wear in San Juan in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in San Juan in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Juan climate overview or explore weather in Trinidad & Tobago.
