Current sea water temperature:
+85.1°F
| Minimum sea water temperature in May: | 88.5°F |
| Maximum sea water temperature in May: | 78.6°F |
| Average sea water temperature in May: | 83.1°F |
| more information | |
14 days
forecast
forecast
| Key Largo |
monthly
weather
weather
| Key Largo |
Sea water temperature for the last 10 days:
| May 18 | 85.1°F | May 13 | 85.6°F |
| May 17 | 85.1°F | May 12 | 84.2°F |
| May 16 | 85.3°F | May 11 | 84.9°F |
| May 15 | 86.0°F | May 10 | 84.7°F |
| May 14 | 86.2°F | May 9 | 84.9°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: 09:03
May 18, monday
1200
86°F
W
19 mph
19 mph
1500
84°F
W
18 mph
18 mph
1800
82°F
W
19 mph
19 mph
2100
82°F
W
20 mph
20 mph
May 19, tuesday
0000
82°F
W
21 mph
21 mph
0300
82°F
W
21 mph
21 mph
0600
82°F
W
19 mph
19 mph
0900
82°F
W
18 mph
18 mph
