Sea Temperature in Grand Isle in September

Complete information on the sea temperature range in the Gulf of Mexico (Gulf of America) in Grand Isle in September. Historical daily data. Climate details for September. 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 September

25°C

MINIMUN

28.5°C

AVERAGE

32°C

MAXIMUM

Historical Data of Water Temperature in September in Grand Isle

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

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

Day	2024	2023	2022	Average
Sep 1	29°C	29°C	30°C	29.3°C
Sep 2	29°C	29°C	30°C	29.3°C
Sep 3	29°C	29°C	29°C	28.8°C
Sep 4	29°C	29°C	29°C	28.8°C
Sep 5	30°C	29°C	29°C	29.3°C
Sep 6	30°C	30°C	30°C	29.8°C
Sep 7	30°C	30°C	30°C	29.5°C
Sep 8	30°C	30°C	30°C	29.8°C
Sep 9	30°C	29°C	29°C	29.0°C
Sep 10	29°C	29°C	29°C	28.8°C
Sep 11	29°C	30°C	29°C	28.8°C
Sep 12	29°C	29°C	28°C	28.5°C
Sep 13	29°C	30°C	28°C	28.5°C
Sep 14	29°C	29°C	27°C	28.0°C
Sep 15	29°C	29°C	27°C	28.0°C
Sep 16	28°C	29°C	27°C	27.8°C
Sep 17	28°C	28°C	28°C	27.8°C
Sep 18	28°C	28°C	28°C	28.0°C
Sep 19	28°C	28°C	28°C	27.8°C
Sep 20	28°C	28°C	28°C	28.0°C
Sep 21	28°C	28°C	29°C	28.3°C
Sep 22	28°C	28°C	29°C	28.3°C
Sep 23	27°C	27°C	29°C	27.8°C
Sep 24	27°C	27°C	29°C	28.0°C
Sep 25	26°C	28°C	29°C	28.0°C
Sep 26	27°C	26°C	29°C	27.8°C
Sep 27	27°C	26°C	29°C	27.5°C
Sep 28	27°C	27°C	29°C	28.0°C
Sep 29	27°C	27°C	29°C	27.8°C

Grand Isle Climate and Swimming Opportunities in September

31°C

Average Day Air Temperature

22°C

Average Night Air Temperature

147 mm

Precipitation Amount per Month

10 days

Number of Rainy Days

12 hrs

Daylight
per Day

7 hrs

Sunshine
per Day

13 km/h

Average Wind Speed

75%

Average
humidity

Grand Isle lies within the Louisiana in United States. The average daytime temperature in Grand Isle in September is 87°F (31°C), while the nighttime average is 71°F (22°C). There are typically 10 rainy days during the month, with a total precipitation of 5.8 inches (147 mm). The daylight duration in September in Grand Isle is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 8 mph (13 km/h), and the humidity level is around 75%.

The water temperature in Grand Isle in September ranges from 81°F to 84°F (27°C to 29°C). At the beginning of the month, the average temperature is around 84°F (29°C), shifting to 82°F (28°C) by mid-September and reaching 82°F (28°C) in the last ten days. Overall, the average sea temperature in Grand Isle for September is 82°F (28°C). The water is almost like a bath, perfect for those who prefer very warm conditions. However, it may not be as refreshing on extremely hot days.

Sea Temperature in September in Nearby Cities

Frequently Asked Questions About Water Temperatures in September in Grand Isle

What is the sea temperature in Grand Isle in September?

The water temperature in the Gulf of Mexico (Gulf of America) in Grand Isle in September ranges from 81°F to 84°F (27°C to 29°C).

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

The average sea temperature in Grand Isle in September is 82°F (28°C), and the air temperature is 87°F (31°C), so the water is almost like a bath, perfect for those who prefer very warm conditions. However, it may not be as refreshing on extremely hot days.