Measurements:
°C
°F
Sanibel Island
68°F
W 6 mph
Feels like: 68°F
Precip: 0%
World Resorts USA Sanibel Island Weather

Sanibel Island Sea Water Temperature

Current Sea Water Temperature:
+74.2°F
Maximum Sea Water Temperature in December: 79.4°F
Minimum Sea Water Temperature in December: 63.6°F
Average water temperature in December: 71.8°F

Sea Water Temperature for the Last 10 Days:

December 04 74.2°F November 29 74.0°F
December 03 73.8°F November 28 76.8°F
December 02 73.8°F November 27 77.0°F
December 01 72.2°F November 26 77.0°F
November 30 72.2°F November 25 76.6°F

When is the Warmest Sea for Sanibel Island?

According to our data for the last three years for Sanibel Island the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Sanibel Island was 93.2°F. The maximum and minimum values were 91.4°F and 94.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Sanibel Island was 91.0°F. The maximum and minimum values were 89.2°F and 93.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Sanibel Island was 89.6°F. The maximum and minimum values were 87.6°F and 91.8°F respectively.

Best Time to Visit Sanibel Island
The most sunny months:
March 19 days
April 17 days
February 15 days
The most warm months:
August 92.2 °F
July 92.2 °F
September 90.7 °F
Warmest sea temperature:
August 91.8 °F
July 91.4 °F
September 90.3 °F
The most cold months:
January 71.1 °F
December 73.7 °F
February 75.8 °F
The most rainy months:
June 6 days
July 5 days
August 4 days
The most windy months:
October 10 mph
November 10 mph
January 10 mph

Sanibel Island on the Weather Map

USA Resorts:
NAME
Chicago 0
Hawaii +78
Honolulu +78
Houston +46
Las Vegas +40
Los Angeles +52
Maui +72
Miami +72
Miami Beach +80
New York +18
San Diego +54
San Francisco +46
Sarasota +62
Tampa +62
Washington +28
24 Hours Weather Forecast
Sanibel Island
Local time: 02:19
05 dec, friday
0300 68°F
W
6 mph
0600 68°F
NW
7 mph
0900 68°F
NW
9 mph
1200 72°F
N
9 mph
1500 74°F
N
10 mph
1800 74°F
N
7 mph
2100 74°F
NE
6 mph
06 dec, saturday
0000 74°F
N
6 mph