Simpson Bay Weather in December

December in Simpson Bay brings high temperatures, with daytime highs of 28°C (82°F) and nights around 25°C (77°F). The perfect weather makes it a solid choice for a visit.

Rainfall in Simpson Bay in December

Climate statistics over the past 30 years suggest around 20 days of rain, with 60 mm (2.4 in) average for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Simpson Bay in December

December is a good time to be in Simpson Bay. Days are perfect, reaching 28°C (82°F), with nights around 25°C (77°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Simpson Bay in December

Expect sunny days throughout the month, with an estimated 248 hours of sunshine. This makes it a pleasant time to visit Simpson Bay.

Wind Speed in Simpson Bay in December

Wind speeds average 5 m/s (10 knots) during December. 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 December

The water is 27°C (81°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sint Maarten, check out our Simpson Bay's climate page.

Simpson Bay Temperature in December

Min Temperature 25°C (77°F)  

Max Temperature 28°C (82°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 67%  

Precipitation 60 mm (2.4 in)  

Rainy days 20 days  

Humidity 77% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 248 hours *  

Percentage Sunshine 71% *  

* Data from: Sint Maarten, Sint Maarten (3 KM, 2 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Simpson Bay typically stay consistent throughout December, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in December

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Historical weather for Simpson Bay in December

Browse day-by-day weather records for Simpson Bay spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Simpson Bay historical weather extremes in December

According to our 49 years of weather records for Simpson Bay, the following extremes were recorded between 1976 and 2025.

• The warmest day in December was on December 1, 1999, with a maximum of 32°C (90°F).
• Simpson Bay experienced its chilliest December day on December 2, 2005, reaching only 25°C (77°F).
• The lowest overnight temperature recorded in December was 19°C (66°F) (December 16, 2015).

What to Wear in Simpson Bay in December

Warm temperatures in December 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. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 27°C (81°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 Simpson Bay in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

7/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Sint Maarten, check out our Simpson Bay's climate page.

More climate data for Simpson Bay

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Simpson Bay climate overview or explore weather in Sint Maarten.