Africa

In April, nice weather lingers on in West Africa, while the rains and the heat continues to move northwards, from the Gulf of Guinea. On the coast of Kenya, the season of the long rains begins.
Where to go: Egypt (Red Sea), Gambia, Guinea, Guinea Bissau, Senegal (south), South Africa (Durban)

Asia

Around late April, the monsoon starts to affect the Maldives. Waiting for the monsoon, it is very hot in India and south-east Asia.
Where to go: Jordan (Red Sea), Israel (Red Sea)

North and Central America

The temperature increases slightly, and during the month the rains increase south of Nicaragua.
Where to go: Belize, Bermuda, Nicaragua (both coasts), Mexico (Acapulco, Cancun, Riviera Maya), United States (Florida)

Caribbean Sea

It is generally an excellent month throughout the area: the weather is nice, although there are some showers in the slopes exposed to the northeast trade winds, especially in the islands equipped with highlands in the interior. In the northernmost part, the risk of outbreaks of cold air is by now very small. It starts to get a bit muggy, especially in the southernmost part.
Where to go: Anguilla, Antigua and Barbuda, Bahamas, Cuba, Dominica, Grenada, Cayman Islands, Jamaica, Leeward Antilles (Aruba, Bonaire, Curacao), Martinique, Montserrat, Puerto Rico (south coast), Saint Lucia, Saint Kitts and Nevis, Saint Barthélemy, Saint Martin/Sint Maarten, Saint Vincent and the Grenadines, Turks and Caicos Islands, Trinidad and Tobago, Venezuela (islands)

South America

In the tropical zone, there are still widespread rains, while it's already autumn in the subtropical zone. All in all, you can still go to Rio de Janeiro.
Where to go: Rio de Janeiro

Oceania

In the Southern Hemisphere the hot season continues, with the risk of heavy rains and the passage of cyclones. So, it's better to look at the Northern Hemisphere.
Where to go: Guam, Marshall Islands, Northern Mariana Islands, Palau