Tamarindo Weather in September
September in Tamarindo averages 30°C (86°F) during the day and 25°C (77°F) at night. September is part of the rainy season, with around 331 mm (13 in) of rainfall and frequent showers.
Rainfall in Tamarindo in September
As part of the rainy season, Tamarindo sees around 23 days of rain in September, with an average of 331 mm (13 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Tamarindo in September
In September, Tamarindo gets very high temperatures, with highs of 30°C (86°F). Nights cool to around 25°C (77°F). Mornings and evenings are often more comfortable than the peak afternoon hours. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Tamarindo in September
The city usually sees around 158 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Tamarindo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Tamarindo's climate page.
Tamarindo Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
77%
Precipitation
331 mm (13 in)
Rainy days
23 days
Humidity
86% *
Sunshine
158 hours *
Percentage Sunshine
*
Daily Historical Temperatures
41-year average (1977-2025)
Based on our historical records, temperatures in Tamarindo typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
41-year average (1977-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Tamarindo in September
Browse day-by-day weather records for Tamarindo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Tamarindo historical weather extremes in September
According to our 26 years of weather records for Tamarindo, the following extremes were recorded between 1999 and 2025.
- The hottest September day on record in Tamarindo reached 35°C (95°F) (September 23, 2023).
- The coldest September day was on September 26, 2010, with a maximum of 25°C (77°F).
- Tamarindo registered its coldest September night on September 25, 2006, with temperatures dropping to 20°C (68°F).
- The heaviest September precipitation occurred on September 7, 2021, when 208 mm (8.2 in) of precipitation fell.
Best Places in Costa Rica in September
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica in September →
perfect weather
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What to Wear in Tamarindo in September
Warm temperatures in September 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! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Tamarindo in September
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 Costa Rica, check out our Tamarindo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Tamarindo climate overview or explore weather in Costa Rica.
