Sea Temperature in Grand Isle in December

Complete information on the sea temperature range in the Gulf of Mexico (Gulf of America) in Grand Isle in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Grand Isle. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Grand Isle in December

54°F

MINIMUN

61°F

AVERAGE

68°F

MAXIMUM

Historical Data of Water Temperature in December in Grand Isle

Water Temperature Chart for Gulf of Mexico (Gulf of America) in Grand Isle in December

Sea Temperature Table in Grand Isle in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	66°C	64°C	64°C	64°C
Dec 2	64°C	64°C	64°C	64°C
Dec 3	64°C	63°C	64°C	64°C
Dec 4	63°C	63°C	64°C	64°C
Dec 5	63°C	63°C	64°C	64°C
Dec 6	63°C	63°C	64°C	64°C
Dec 7	61°C	63°C	64°C	64°C
Dec 8	61°C	63°C	63°C	63°C
Dec 9	63°C	61°C	63°C	63°C
Dec 10	63°C	63°C	66°C	64°C
Dec 11	63°C	63°C	66°C	65°C
Dec 12	61°C	61°C	66°C	64°C
Dec 13	59°C	61°C	68°C	64°C
Dec 14	61°C	59°C	66°C	63°C
Dec 15	61°C	59°C	66°C	64°C
Dec 16	61°C	59°C	66°C	63°C
Dec 17	61°C	61°C	66°C	64°C
Dec 18	63°C	59°C	64°C	63°C
Dec 19	61°C	59°C	63°C	62°C
Dec 20	63°C	59°C	61°C	62°C
Dec 21	61°C	59°C	61°C	61°C
Dec 22	61°C	59°C	61°C	61°C
Dec 23	61°C	59°C	61°C	61°C
Dec 24	59°C	59°C	61°C	60°C
Dec 25	59°C	61°C	59°C	60°C
Dec 26	59°C	59°C	57°C	60°C
Dec 27	59°C	61°C	57°C	60°C
Dec 28	61°C	61°C	55°C	60°C
Dec 29	61°C	61°C	55°C	60°C
Dec 30	59°C	59°C	55°C	60°C

Grand Isle Climate and Swimming Opportunities in December

64°F

Average Day Air Temperature

46°F

Average Night Air Temperature

4 in

Precipitation Amount per Month

9 days

Number of Rainy Days

10 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

9 mph

Average Wind Speed

75%

Average
humidity

Grand Isle lies within the Louisiana in United States. The average daytime temperature in Grand Isle in December is 64°F (18°C), while the nighttime average is 47°F (8°C). There are typically nine rainy days during the month, with a total precipitation of 4.2 inches (107 mm). The daylight duration in December in Grand Isle is 10 hours, with an average of 5 hours of sunshine per day. The average wind speed in December is 9 mph (14 km/h), and the humidity level is around 75%.

The water temperature in Grand Isle in December ranges from 59°F to 64°F (15°C to 18°C). At the beginning of the month, the average temperature is around 64°F (18°C), shifting to 64°F (18°C) by mid-December and reaching 61°F (16°C) in the last ten days. Overall, the average sea temperature in Grand Isle for December is 63°F (17°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Grand Isle

What is the sea temperature in Grand Isle in December?

The water temperature in the Gulf of Mexico (Gulf of America) in Grand Isle in December ranges from 59°F to 64°F (15°C to 18°C).

Is it possible to swim in the Gulf of Mexico (Gulf of America) in Grand Isle in December?

The average sea temperature in Grand Isle in December is 63°F (17°C), and the air temperature is 64°F (18°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.