Koolbaai Weather in April
With daytime temperatures of 27°C (81°F) and nighttime lows of 25°C (77°F), April in Koolbaai brings high temperatures during the day. The perfect weather makes it an appealing time to visit.
Rainfall in Koolbaai in April
This month experiences about 12 days of rain according to historical data, averaging 45 mm (1.8 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Koolbaai in April
Weather in Koolbaai is at its perfect in April. Highs reach 27°C (81°F), while nights settle around 25°C (77°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights stay warm at around 25°C (77°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Koolbaai in April
The city usually sees around 266 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Koolbaai in April
Wind speeds average 5 m/s (10 knots) during April. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.
Average water temperature in April
The water is 26°C (79°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, May, June, July and December typically offer the best circumstances for Koolbaai.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sint Maarten, check out our Koolbaai's climate page.
Koolbaai Temperature in April
Min Temperature
25°C (77°F)
Max Temperature
27°C (81°F)
Water Temperature
26°C (79°F) *
Chance of Rain
41%
Precipitation
45 mm (1.8 in)
Rainy days
12 days
Humidity
77% *
Windspeed
5 m/s (10 knots) *
Sunshine
266 hours *
Percentage Sunshine
69% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koolbaai typically stay consistent throughout April, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in April
Historical weather for Koolbaai in April
Browse day-by-day weather records for Koolbaai spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koolbaai historical weather extremes in April
Based on 48 years of weather observations in Koolbaai between 1978 and 2026, these are the recorded extremes.
- The hottest April day on record in Koolbaai reached 32°C (90°F) (April 25, 1987).
- Koolbaai experienced its chilliest April day on April 16, 1982, reaching only 24°C (75°F).
- The coldest night in April in Koolbaai was on April 7, 2003, with a minimum of 20°C (68°F).
Best Places in Sint Maarten in April
Find out more about the weather in Sint Maarten and which places have the best travel conditions in this month. See all of Sint Maarten in April →
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What to Wear in Koolbaai in April
Warm weather calls for comfortable, breathable clothing in April. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. With water temperatures around 26°C (79°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Koolbaai in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Sint Maarten, check out our Koolbaai's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Koolbaai climate overview or explore weather in Sint Maarten.
