June is the hottest month in Havana with an average temperature of 27°C (81°F) and the coldest is January at 21°C (70°F) with the most daily sunshine hours at 11 in July. The wettest month is June with an average of 80mm of rain.
The best month to swim in the sea in Cuba
If you're planning a beach holiday to Cuba, maybe to the beautiful white sands at Varadero or one of the delightful offshore islands, the best time to go is in August when the average sea temperature is 30°C(86°F).
Visiting Cuba in November - April
This is Cuba’s dry season with cooler temps making it a wonderful time to visit. You’ll do a fair bit of walking so this time of the year is great for that. Start planning really early though, Cuba is busy at this time with Dec being super busy. You should begin to plan 9 months out and 12 if you want to holiday in Dec to Feb or over Easter.
It’s also way more expensive to stay at this time with prices in some hotels getting up to double and casa’s adding more too.
Visit Vinales in March and April for Cuban highlights like the tobacco harvesting. December in Havana has the International Jazz Festival.