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Koolbaai Weather and Climate: A Comprehensive Guide

Koolbaai has a steady warm climate throughout the year. It receives a reasonable amount of rainfall. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

With minimal seasonal shifts, Koolbaai experiences a constant climate year-round. Average daytime temperatures reach a comfortable 30°C in August. In February, the coolest month of the year, temperatures drop to a comfortable 27°C.

At night, you can expect cooler temperatures, with averages dropping to around 24°C during this month. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Generally, Koolbaai receives mid-range precipitation levels, with 917 mm annually. Koolbaai can be quite wet during October, receiving approximately 139 mm of precipitation over 20 rainy days.

In contrast March, experiences much drier conditions, with 32 mm of rainfall, spread across 13 rainy days. For more details, please visit our Koolbaai Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Despite minor fluctuations, Koolbaai enjoys a fairly consistent amount of sunshine throughout the year. In August, you can expect approximately 9.5 hours of daily sunshine, while even in September, Koolbaai still receives about 7.7 hours. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Sint Maarten, Sint Maarten (4 KM, 2 Miles).

Daily hours of sunshine

Data from: Sint Maarten, Sint Maarten (4 KM, 2 Miles).

Average water temperature

The mean water temperature over the year ranges from 26°C in January to 29°C in September.

Water temperature over the year

Data from: Sint Maarten, Sint Maarten (4 KM, 2 Miles).

Forecast for Koolbaai

Wed   Jan 15
29°C | 23°C
NE 6 m/s
almost clear and no rain

almost clear and no rain

Thu   Jan 16
29°C | 24°C
NE 7 m/s
0.5 mm
partly cloudy and  chance of slight rain

partly cloudy and chance of slight rain

Fri   Jan 17
29°C | 24°C
E 7 m/s
2.9 mm
partly cloudy and rain

partly cloudy and rain

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Koolbaai in Sint Maarten

The best time to visit is during the drier months: January, February, March and April.

Other facts from our historical weather data:
  • Which is the warmest month in Koolbaai?
    August has an average maximum temperature of 30°C and is the warmest month of the year.
  • Which is the coldest month in Koolbaai?
    The coldest month is February with an average maximum temperature of 27°C.
  • Which is the wettest month in Koolbaai?
    October tops the wettest month list with 139 mm of rainfall.
  • Which is the driest month in Koolbaai?
    March is the driest month with 32 mm of precipitation.
  • Which is the sunniest month in Koolbaai?
    August is the sunniest month with an average of 285 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.