Measurements:
°C
°F
Sanibel Island
88°F
NW 9 mph
Feels like: 96°F
Precip: 34%
World Resorts USA Sanibel Island Weather

Sanibel Island Sea Water Temperature

Current Sea Water Temperature:
+92.0°F
Maximum Sea Water Temperature in September: 94.2°F
Minimum Sea Water Temperature in September: 87.4°F
Average water temperature in September: 90.4°F

Sea Water Temperature for the Last 10 Days:

September 15 92.0°F September 10 92.6°F
September 14 92.4°F September 09 93.0°F
September 13 92.4°F September 08 92.6°F
September 12 92.8°F September 07 93.4°F
September 11 93.0°F September 06 92.6°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: 2026 2025 2024

The average sea surface temperature in August 2026 for Sanibel Island was 92.2°F. The maximum and minimum values were 90.4°F and 93.8°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Sanibel Island was 92.3°F. The maximum and minimum values were 90.6°F and 93.6°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Sanibel Island was 92.5°F. The maximum and minimum values were 92.0°F and 93.4°F respectively.

Best Time to Visit Sanibel Island
The most sunny months:
March 19 days
April 18 days
December 17 days
The most warm months:
July 92.6 °F
August 92.6 °F
June 91.2 °F
Warmest sea temperature:
August 91.9 °F
July 91.5 °F
September 90.3 °F
The most cold months:
January 71.3 °F
December 74.5 °F
February 75.1 °F
The most rainy months:
July 5 days
June 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
Boston +62
Chicago +66
Hawaii +80
Las Vegas +80
Los Angeles +72
Maui +66
Miami +88
Myrtle Beach +78
New York +66
Panama City Beach +90
San Diego +70
San Francisco +60
Santa Monica +72
Sarasota +86
Washington +66
24 Hours Weather Forecast
Sanibel Island
Local time: 08:58
15 sep, tuesday
0900 88°F
NW
9 mph
1200 92°F
NW
6 mph
1500 92°F
E
8 mph
1800 92°F
SW
4 mph
2100 88°F
W
16 mph
16 sep, wednesday
0000 84°F
W
13 mph
0300 84°F
SW
12 mph
0600 82°F
SW
12 mph