Current sea water temperature:
+86.5°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: | 86.7°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| September 24 | 86.5°F | September 19 | 86.9°F |
| September 23 | 86.4°F | September 18 | 87.3°F |
| September 22 | 86.9°F | September 17 | 88.2°F |
| September 21 | 87.1°F | September 16 | 87.8°F |
| September 20 | 87.1°F | September 15 | 87.6°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:
2026
2025
2024
The average sea water temperature in September of 2026 was 87.6°F. The highest and lowest sea temperatures during the month were 88.5°F and 86.4°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: 21:42
September 25, friday
0000
82°F
E
8 mph
8 mph
0300
81°F
S
14 mph
14 mph
0600
79°F
S
16 mph
16 mph
0900
79°F
S
16 mph
16 mph
1200
82°F
SW
11 mph
11 mph
1500
82°F
SW
16 mph
16 mph
1800
82°F
SW
14 mph
14 mph
2100
82°F
SW
12 mph
12 mph
