The lowest water temperature in Punta Cana is 78° F, which occurs in March, while the highest is 85° F in September. The climate in July is a mix of hot and sunny days, with occasional intense but brief tropical rains. It's difficult to predict, but it's likely that Punta Cana will experience one disturbance per year, usually lasting between 2 and 3 days. April is a great time to visit Punta Cana as the weather remains favorable for a carefree vacation and plenty of beach time without interruptions due to rain. Rain is part of the climate in Punta Cana, but there are usually only 2 to 3 heavy showers (often at night).
In between these showers, visitors can enjoy the perfect Caribbean weather with lots of sun. Using weather apps, you can check the water temperature in Punta Cana on any day of this period that interests you. This is because the weather in Punta Cana and throughout the Caribbean is completely unpredictable and if it only rains one drop a day, the app will still mark it as a rainy day. While sea temperatures in Punta Cana are as accurate as current data allow, there may be slight local and regional variations depending on conditions and variations in sea depth. It's common to have a few showers at any time of the year in the Dominican Republic, but you can expect at least 70 to 80% sunshine while enjoying your vacation in Punta Cana on its beautiful beaches.
The hurricane season in Punta Cana (and in the Dominican Republic) lasts from June to November. That's why, in my opinion, Punta Cana and the Dominican Republic are an excellent tourist destination all year round. So, it doesn't matter if it's the rainy season or the dry season, it won't rain all day long. The TSM (Tropical Storm Model) provides information on global climate and can be used to predict the climate in Punta Cana, as well as for simulations of atmospheric models and to study marine ecosystems in the area. Depending on the humidity, sun, wind and your personal feeling, temperatures in Punta Cana can appear and feel as high as 100° F.