The climate of Bonaire is tropical, hot all year round, since the temperature fluctuates around 23 °C/25 °C (73 °F/77 °F) at night and around 29 °C/31 °C (84 °F/88 °F) during the day. The hottest and more sultry period runs from May to October. However, the north-east trade winds blow constantly, tempering the heat.
Bonaire is a Caribbean island, about a hundred kilometers (60 miles) north of the coast of Venezuela, and it's an official part of the Netherlands, like the neighbouring Curaçao and Aruba.
Here are the average temperatures of the capital, Kralendijk.
Kralendijk - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)232323242425252525252423
Max (°C)292929303031313131313029
Min (°F)737373757577777777777573
Max (°F)848484868688888888888684

Being in the Leeward Antilles, the climate is also sunny and dry, so much so that in a typical year, only 565 millimeters (22 inches) of rain fall, with a relatively rainy period between October and December, when, however, rainfall remains below 110 mm (4.3 in) per month. The rains, brought by the northeast trade winds, continue with some frequency also in January or mid-February.
Here is the average precipitation.
Kralendijk - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)5025202520254035309510595565
Prec.(in)210.810.811.61.41.23.74.13.722.2
Days9533346557111172

The amount of sunshine is good all year round, as can be seen in the following table.
Kralendijk - Sunshine
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Hours899889999888

Bonaire is a flat island, with a certain shortage of fresh water because of the lack of rivers.

Bonaire

The sea in Bonaire is warm enough to swim in throughout the year: the water temperature ranges from a minimum of 26 °C (79 °F) in February and March, to a maximum of 29 °C (84 °F) in September and October. Here are the average sea temperatures.
Bonaire - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)272626272728282829292827
Temp (°F)817979818182828284848281

Hurricanes



From June to November, but especially from August to October, there is the danger of tropical storms and hurricanes: compared with the rest of the Caribbean, they are relatively rare at these latitudes, but it is not impossible that they reach the Leeward Antilles and Bonaire, as happened with Hurricane Irene in September 1971, Joan in October 1988, Bret (tropical storm) in August 1993, Ivan in September 2004, and Felix in September 2007.

Best Time



The best time to visit Bonaire runs from mid-February to May. The period from May to October is sultry, even though the trade winds make the heat bearable. From October to December the rainfall is moderate, and sometimes the rains, though not excessive, linger on until January or mid-February.

What to pack



All year round: bring light tropical clothes, made of cotton or linen, possibly a light raincoat for thunderstorms, especially from October to January; those who are sensitive to cold can bring a light sweatshirt for the evening.
When going to the reef, you can bring snorkeling equipment, including water shoes or rubber-soled shoes.