Koolbaai Weather in January
January in Koolbaai brings high temperatures, with daytime highs of 27°C (81°F) and nights around 24°C (75°F). The perfect weather makes it a solid choice for a visit.
Rainfall in Koolbaai in January
Past climate data indicates that roughly 17 days will see rain, totalling around 40 mm (1.6 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Koolbaai in January
January in Koolbaai is generally perfect, with days reaching 27°C (81°F) and nights settling around 24°C (75°F). Overall, the month follows a fairly predictable daily temperature pattern. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Koolbaai in January
Expect a lot of sunshine this month, with about 255 hours of sun. These sunny conditions add to the overall experience.
Wind Speed in Koolbaai in January
January has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in January
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.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, May, June, July and December typically offer the best weather 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 January
Min Temperature
24°C (75°F)
Max Temperature
27°C (81°F)
Water Temperature
26°C (79°F) *
Chance of Rain
58%
Precipitation
40 mm (1.6 in)
Rainy days
17 days
Humidity
76% *
Windspeed
5 m/s (10 knots) *
Sunshine
255 hours *
Percentage Sunshine
75% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Koolbaai typically stay consistent throughout January, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in January
Historical weather for Koolbaai in January
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 January
According to our 49 years of weather records for Koolbaai, the following extremes were recorded between 1976 and 2025.
- The warmest day in January was on January 8, 1992, with a maximum of 32°C (90°F).
- Koolbaai experienced its chilliest January day on January 30, 2005, reaching only 24°C (75°F).
- Koolbaai registered its coldest January night on January 27, 2020, with temperatures dropping to 16°C (61°F).
Best Places in Sint Maarten in January
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 January →
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What to Wear in Koolbaai in January
Warm temperatures in January make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. The water temperature sits at about 26°C (79°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Koolbaai in January
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.
