Current sea water temperature:
+88.2°F
| Minimum sea water temperature in September: | 88.7°F |
| Maximum sea water temperature in September: | 82.4°F |
| Average sea water temperature in September: | 86.6°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| September 4 | 88.2°F | August 30 | 88.7°F |
| September 3 | 88.3°F | August 29 | 89.2°F |
| September 2 | 88.5°F | August 28 | 88.0°F |
| September 1 | 87.6°F | August 27 | 88.9°F |
| August 31 | 88.0°F | August 26 | 89.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Key Largo?
Based on the data about daily sea water temperature for the last three years the warmest sea in Key Largo was noticed in August, July and September.
Monthly Sea Temperatures in Key Largo, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 88.4°F. The highest and lowest sea temperatures during the month were 89.8°F and 86.5°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 88.2°F. The highest and lowest sea temperatures during the month were 89.8°F and 87.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 86.6°F. The highest and lowest sea temperatures during the month were 88.5°F and 85.5°F.
current
weather
weather
| Key Largo |
weather in
September
September
| Key Largo |
Best time for vacation in Key Largo
Key Largo on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key Largo
Local time: 13:46
September 04, friday
1500
79°F
W
9 mph
9 mph
1800
84°F
W
9 mph
9 mph
2100
86°F
W
11 mph
11 mph
September 05, saturday
0000
86°F
W
12 mph
12 mph
0300
86°F
W
12 mph
12 mph
0600
84°F
NW
11 mph
11 mph
0900
86°F
NW
10 mph
10 mph
1200
86°F
NW
7 mph
7 mph
