Current sea water temperature:
+80.1°F
| Minimum sea water temperature in April: | 85.1°F |
| Maximum sea water temperature in April: | 73.9°F |
| Average sea water temperature in April: | 79.3°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| April 27 | 80.1°F | April 22 | 79.0°F |
| April 26 | 78.6°F | April 21 | 80.4°F |
| April 25 | 77.4°F | April 20 | 79.5°F |
| April 24 | 77.5°F | April 19 | 77.9°F |
| April 23 | 77.2°F | April 18 | 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
May
May
| 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: 01:08
April 28, tuesday
0300
77°F
SW
14 mph
14 mph
0600
77°F
W
12 mph
12 mph
0900
79°F
W
11 mph
11 mph
1200
79°F
W
9 mph
9 mph
1500
79°F
W
12 mph
12 mph
1800
79°F
W
13 mph
13 mph
2100
79°F
W
14 mph
14 mph
April 29, wednesday
0000
77°F
W
16 mph
16 mph
