Tamarindo Temperature by Month

The average annual maximum temperature in Tamarindo, Guanacaste, Costa Rica is 31°C (88°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Tamarindo compares to cities worldwide.

In Tamarindo temperatures are generally consistent throughout the year. Maximum daytime temperatures range from a comfortable 30°C (86°F) in October to a very warm 33°C (91°F) in April. Nighttime lows range from 26°C (79°F) in April to 24°C (75°F) in October.

The chart below illustrates the average maximum day and minimum night temperatures in Tamarindo by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. April, the city's warmest month, averages 265 hours of sunshine.

The chart below shows the average temperature throughout the year:

Tamarindo's average annual maximum temperature is 31°C (88°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Tamarindo, October is the coolest month, with average highs of 30°C (86°F) and humidity around 86%, considered very high. In April, the warmest month, temperatures average 33°C (91°F) with 62% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Tamarindo's weather, including monthly rainfall, sunshine hours, and humidity, visit our Tamarindo climate page.