Current sea water temperature:
+75.2°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: | 75.3°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| December 30 | 75.2°F | December 25 | 74.5°F |
| December 29 | 75.2°F | December 24 | 75.4°F |
| December 28 | 74.1°F | December 23 | 76.1°F |
| December 27 | 73.8°F | December 22 | 75.4°F |
| December 26 | 74.3°F | December 21 | 76.5°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
January
January
| 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: 15:00
December 30, tuesday
1800
73°F
SE
11 mph
11 mph
2100
68°F
S
18 mph
18 mph
December 31, wednesday
0000
64°F
S
19 mph
19 mph
0300
61°F
S
17 mph
17 mph
0600
59°F
S
19 mph
19 mph
0900
59°F
S
19 mph
19 mph
1200
63°F
S
14 mph
14 mph
1500
68°F
S
9 mph
9 mph
