Grand Isle Water Temperature

(Today) 2024

22.1°C / 71.7°F

The water will feel warm (balmy). Most people will be OK with just bathers / swimming costume at this temperature. If you intend to stay in the water for a while a thin shorty wetsuit will suffice.

Current weather

23°C / 73°F
(overcast clouds)
Partly cloudy
Wind
15 mph
Humidity
88%

The measurements for the water temperature in Grand Isle, Louisiana are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Grand Isle water temperature derived from many years of historical sea surface temperature data.

Grand Isle average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Grand Isle
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 12.4 12.5 13.6 19.6 22.1 27.4 29 28.9 26.3 22.4 17.7 14.6
Max °C 17.3 18.6 22.6 25.3 28.7 30.5 31.5 32.5 30.6 28.3 24.1 18.8
Min °F 56.2 56.9 60.1 69.5 74.4 82.5 85.2 85.5 81 74.6 66.4 60
Max °F 61.1 63 69.1 75.2 81 85.6 87.7 89.1 85.3 80.5 72.8 64.2

The warmest water temperature is in August with an average around 87.3°F / 30.7°C. The coldest month is January with an average water temperature of 58.6°F / 14.8°C.

7 day tide forecast for Grand Isle

TueWedThuFriSatSunMon
  • Low 5:10am
    (-0.01m)
  • High 5:57pm
    (0.3m)
  • Low 5:59am
    (0.02m)
  • High 7:34pm
    (0.27m)
  • Low 6:39am
    (0.06m)
  • High 9:16pm
    (0.23m)
  • Low 7:10am
    (0.11m)
  • High 11:08pm
    (0.2m)
  • Low 7:17am
    (0.16m)
  • High 11:42am
    (0.18m)
  • Low 7:23pm
    (0.13m)
  • High 10:58am
    (0.22m)
  • Low 8:35pm
    (0.09m)
  • High 10:23am
    (0.27m)
  • Low 9:25pm
    (0.05m)
7 day tide times for Grand Isle

*These tide times are estimates based on the nearest accurate location (Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.