Average monthly water temperature in Koolbaai, Sint Maarten
On this page you find the mean water temperature over the year in Koolbaai (), Sint Maarten. Dive into the water temperature trends, highlighting the best times for swimming and other activities.
Water temperatures in Koolbaai remain warm year-round, perfect for aquatic activities. The warmest month, September, has an average temperature of 29°C (84°F).
The coolest water temperature month is January, averaging 26°C (79°F). Whether you’re swimming or just enjoying the water, Koolbaai offers ideal conditions year-round.
Koolbaai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Koolbaai - and find the best time to visit.
Koolbaai 3-Day Forecast
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Koolbaai climate overview or explore weather in Sint Maarten.
Popular this month
Where to go in September - average daytime high across popular destinations.
Cupecoy
30°C (86°F) Maho Reef30°C (86°F) Koolbaai30°C (86°F) Dawn Beach30°C (86°F) Philipsburg30°C (86°F) Simpson Bay30°C (86°F) Lowlands30°C (86°F) Upper Princeʼs Quarter30°C (86°F) 
