UTC Offset
UTC-04:00
Koolbaai, Sint Maarten Snapshot 2026
Where is Koolbaai?
Koolbaai, Sint Maarten
- Continent
- Americas
- Country
- Sint Maarten
- City
- Koolbaai
- Population
- 6K
- Coordinates
- 18.04°, -63.08°
Koolbaai is a city in Sint Maarten with a population of approximately 6K. Average temperatures range from 24°C (76°F) in February to 28°C (83°F) in September. The best time to visit is January, February, March, April, December.
Time in Koolbaai right now
Open full time & time zone page 03:49 49
Wednesday, July 1, 2026
IANA time zone
America/Lower_Princes
Daylight saving
No DST
Next DST change
—
Live weather in Koolbaai
Daylight in Koolbaai today
View full sunrise & sunset page Sunrise
Sunset
Day length
13h 12m
Climate normals for Koolbaai
Long-term monthly averages based on historical data.
January best
Excellent 
February best
Excellent March best
Excellent April best
Excellent May
Good June
Good July
Fair August
Fair September
Fair October
Fair November
Good December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 26°C / 25°C | 27°C / 25°C | 11days (29 mm) Wet | 10.4h Excellent | 77% Humid | 6.7 High | Excellent | View Details |
| February best | 26°C / 24°C | 27°C / 24°C | 8days (36 mm) Wet | 10.7h Excellent | 77% Humid | 7.6 Very High | Excellent | View Details |
| March best | 26°C / 24°C | 28°C / 25°C | 8days (22 mm) Wet | 11.1h Excellent | 76% Humid | 8.8 Very High | Excellent | View Details |
| April best | 26°C / 25°C | 29°C / 26°C | 10days (40 mm) Wet | 11.4h Excellent | 78% Humid | 9 Very High | Excellent | View Details |
| May | 27°C / 26°C | 30°C / 27°C | 10days (48 mm) Wet | 11.7h Excellent | 80% Humid | 8.8 Very High | Good | View Details |
| June | 28°C / 26°C | 31°C / 28°C | 10days (43 mm) Wet | 11.8h Excellent | 80% Humid | 8.6 Very High | Good | View Details |
| July | 28°C / 27°C | 31°C / 28°C | 16days (76 mm) Wet | 11.7h Excellent | 81% Humid | 8.7 Very High | Fair | View Details |
| August | 28°C / 27°C | 32°C / 29°C | 14days (88 mm) Wet | 11.2h Excellent | 81% Humid | 8.8 Very High | Fair | View Details |
| September | 28°C / 27°C | 33°C / 30°C | 17days (135 mm) Wet | 10.7h Excellent | 81% Humid | 8.5 Very High | Fair | View Details |
| October | 28°C / 27°C | 32°C / 29°C | 16days (129 mm) Wet | 10.1h Excellent | 80% Humid | 7.5 Very High | Fair | View Details |
| November | 27°C / 26°C | 30°C / 28°C | 15days (106 mm) Wet | 9.6h Good | 80% Humid | 6.6 High | Good | View Details |
| December best | 27°C / 25°C | 28°C / 26°C | 11days (37 mm) Wet | 10h Excellent | 77% Humid | 6.3 High | Excellent | View Details |
Monthly Temperatures
High Low
Line chart showing monthly temperatures. Jan: 26°C / 25°C . Feb: 26°C / 24°C . Mar: 26°C / 24°C . Apr: 26°C / 25°C . May: 27°C / 26°C . Jun: 28°C / 26°C . Jul: 28°C / 27°C . Aug: 28°C / 27°C . Sep: 28°C / 27°C . Oct: 28°C / 27°C . Nov: 27°C / 26°C . Dec: 27°C / 25°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 29 mm. Feb: 36 mm. Mar: 22 mm. Apr: 40 mm. May: 48 mm. Jun: 43 mm. Jul: 76 mm. Aug: 88 mm. Sep: 135 mm. Oct: 129 mm. Nov: 106 mm. Dec: 37 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 77%. Feb: 77%. Mar: 76%. Apr: 78%. May: 80%. Jun: 80%. Jul: 81%. Aug: 81%. Sep: 81%. Oct: 80%. Nov: 80%. Dec: 77%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 30 km/h . Feb: 31 km/h . Mar: 29 km/h . Apr: 28 km/h . May: 29 km/h . Jun: 31 km/h . Jul: 33 km/h . Aug: 30 km/h . Sep: 27 km/h . Oct: 26 km/h . Nov: 27 km/h . Dec: 30 km/h .
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 27°C . Feb: 27°C . Mar: 27°C . Apr: 27°C . May: 28°C . Jun: 29°C . Jul: 29°C . Aug: 30°C . Sep: 30°C . Oct: 30°C . Nov: 29°C . Dec: 28°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 8. Mar: UV 9. Apr: UV 9. May: UV 9. Jun: UV 9. Jul: UV 9. Aug: UV 9. Sep: UV 9. Oct: UV 8. Nov: UV 7. Dec: UV 6.
Frequently Asked Questions
Koolbaai has a population of approximately 6K.
The best months to visit Koolbaai are January, February, March, April, December, when temperatures are pleasant and rainfall is lower.
Koolbaai receives approximately 789mm of rainfall annually across 146 rainy days.
Koolbaai is located in Sint Maarten, in the Americas region.