Costa Rica, San José

Friday

Today

High

Saturday

Tomorrow

Moderate

Sunday

Jun 15

Moderate

Monday

Jun 16

High

Tuesday

Jun 17

Extreme

How we forecast?

San José Mosquito Forecast: What to Expect Throughout the Year

If you're planning a trip or living in San José, Costa Rica, understanding the San José mosquito forecast is crucial for your comfort and health. Mosquito activity here fluctuates throughout the year, peaking during the rainy months. For example, June and July typically see the highest mosquito levels, scoring an 8 out of 10 on our forecast scale. This means more buzzing around landmarks like the National Theatre or La Sabana Metropolitan Park. Conversely, February and March are relatively calmer, with mosquito activity rated around 2 to 3. To plan your outdoor activities wisely, check the local weather updates which often correlate with mosquito surges.

Year round mosquito forecast

Mosquito Intensity

Why Do Mosquitoes Thrive in San José?

Several factors influence mosquito activity in San José. The city's tropical climate, combined with its rainy season from May to November, creates perfect breeding grounds for mosquitoes. Standing water in urban areas, such as clogged drains or flower pots, contributes significantly. Here are key influencers:

Warm temperatures averaging 20-26°C (68-79°F)
High humidity during rainy months
Urban green spaces like Parque La Sabana providing shelter

Understanding these elements helps locals and visitors take preventive measures. For more tips on reducing mosquito habitats, visit Costa Rica's Ministry of Health site.

Mosquito-Borne Diseases to Watch Out For

In San José, mosquitoes can transmit several diseases, making awareness essential. The primary concerns include:

Dengue Fever – common in urban areas during rainy seasons
Zika Virus – can affect pregnant women severely
Chikungunya – causes fever and joint pain

The Aedes aegypti mosquito is the main culprit. Symptoms often appear within days of a bite, so early detection is vital. Hospitals near landmarks like the Calderón Guardia Hospital provide resources and treatment. Learn more about symptoms and prevention at the World Health Organization's Costa Rica page.

Staying Updated and Prepared in San José

To keep mosquito bites and related illnesses at bay, staying informed is your best defense. Subscribe to local alerts, use EPA-approved repellents, and wear long sleeves during peak mosquito hours—dawn and dusk. Here’s a quick checklist:

Monitor the

San José mosquito forecast - Eliminate standing water around your home - Use mosquito nets if sleeping outdoors By following these steps, you can enjoy the vibrant culture and beautiful sights of San José, like the Mercado Central, without worry. Stay safe and proactive! Stay updated with the San José mosquito forecast for a healthy trip or stay.

Check out our recommended mosquito protection products

Mosquito-borne diseases in the area

Malaria

Zika

Dengue

Yellow Fever

Chikungunya

West Nile Fever

FAQs

The peak mosquito season in San José is generally from June to July, coinciding with the rainy season when mosquito activity rates reach up to 8 out of 10.

Mosquitoes in San José can transmit dengue fever, Zika virus, and chikungunya, primarily through the Aedes aegypti mosquito species.

Use insect repellents, wear long-sleeved clothing, eliminate standing water near your accommodation, and stay informed through local mosquito forecasts to reduce bite risks.

Further information

WHO_Costa_RicaCosta_Rica_Ministry_of_HealthCosta_Rica_Weather_Institute