Current sea water temperature:
+76.5°F
| Minimum sea water temperature in December: | 80.6°F |
| Maximum sea water temperature in December: | 69.4°F |
| Average sea water temperature in December: | 75.4°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| December 21 | 76.5°F | December 16 | 75.6°F |
| December 20 | 76.1°F | December 15 | 75.6°F |
| December 19 | 75.6°F | December 14 | 76.3°F |
| December 18 | 74.3°F | December 13 | 76.6°F |
| December 17 | 74.3°F | December 12 | 78.1°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 88.7°F. The highest and lowest sea temperatures during the month were 90.1°F and 86.9°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 86.2°F. The highest and lowest sea temperatures during the month were 89.2°F and 84.4°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
December
December
| 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: 05:24
December 21, sunday
0600
72°F
SW
10 mph
10 mph
0900
73°F
SW
11 mph
11 mph
1200
73°F
SW
11 mph
11 mph
1500
73°F
SW
12 mph
12 mph
1800
73°F
SW
15 mph
15 mph
2100
73°F
W
17 mph
17 mph
December 22, monday
0000
73°F
SW
16 mph
16 mph
0300
72°F
SW
19 mph
19 mph
