Current sea water temperature:
+86.5°F
| Minimum sea water temperature in June: | 89.1°F |
| Maximum sea water temperature in June: | 80.2°F |
| Average sea water temperature in June: | 84.7°F |
| more information | |
14 days
forecast
forecast
| Key West |
monthly
weather
weather
| Key West |
Sea water temperature for the last 10 days:
| June 5 | 86.5°F | May 30 | 84.9°F |
| June 4 | 87.6°F | May 29 | 83.8°F |
| June 3 | 87.1°F | May 28 | 83.8°F |
| June 1 | 86.9°F | May 27 | 84.0°F |
| May 31 | 85.1°F | May 26 | 84.2°F |
Monthly sea water temperature, °F
When is the warmest sea in Key West?
Based on the data about daily sea water temperature for the last three years the warmest sea in Key West was noticed in August, July and September.
Monthly Sea Temperatures in Key West, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 88.8°F. The highest and lowest sea temperatures during the month were 90.7°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 86.7°F. The highest and lowest sea temperatures during the month were 88.0°F and 85.1°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 86.9°F. The highest and lowest sea temperatures during the month were 89.2°F and 85.3°F.
current
weather
weather
| Key West |
weather in
June
June
| Key West |
Best time for vacation in Key West
Key West on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key West
Local time: 20:58
June 05, friday
2100
81°F
W
13 mph
13 mph
June 06, saturday
0000
81°F
W
19 mph
19 mph
0300
81°F
W
14 mph
14 mph
0600
81°F
W
13 mph
13 mph
0900
79°F
W
14 mph
14 mph
1200
81°F
W
15 mph
15 mph
1500
81°F
W
14 mph
14 mph
1800
81°F
W
12 mph
12 mph
