Puerto Vallarta Weather Forecast, Mexico The warmest day over the next 25 days weather in Puerto Vallarta is forecast to be Tuesday th July 21 at 33°C (91°F) and the warmest night on Sunday 18th July 21 at 25°C (77°F) The average temperature over the next 25 days in Puerto Vallarta from this forecast is 32°C (90°F)World Resorts Mexico Puerto Vallarta Weather 7 Day Weather Forecast 0812 thu DAY 92 °F E 4 mph precip 85% NIGHT 72 °F W 4 mph precip 79% 0813 fri DAY 92 °F E 4 mph precip 0% NIGHT 74 °F W 2 mph precip 0% 0814 sat DAY 92 °F SE 6 mph The average sea surface temperature in August for Puerto Vallarta was 302Detailed weather forecast for today, tomorrow, the week, 10 days, and the month on YandexWeather Weather forecast accurate to a district level ☂ Online precipitation map and other weather maps Air and water temperature, air pressure, humidity, wind speed, magnetic field and UV Index ☼ Time of sunrise and sunset Information about regional climates Weather forecast Huejotitan J...