Current sea water temperature:
+71.6°F
| Minimum sea water temperature in December: | 77.4°F |
| Maximum sea water temperature in December: | 64.9°F |
| Average sea water temperature in December: | 70.8°F |
| more information | |
14 days
forecast
forecast
| Marco Island |
monthly
weather
weather
| Marco Island |
Sea water temperature for the last 10 days:
| December 21 | 71.6°F | December 16 | 71.6°F |
| December 20 | 70.9°F | December 15 | 72.0°F |
| December 19 | 69.4°F | December 14 | 72.3°F |
| December 18 | 70.3°F | December 13 | 72.0°F |
| December 17 | 70.3°F | December 12 | 72.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Marco Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Marco Island was noticed in August, July and September.
Monthly Sea Temperatures in Marco Island, °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 90.0°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 86.6°F. The highest and lowest sea temperatures during the month were 89.4°F and 84.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 86.0°F. The highest and lowest sea temperatures during the month were 88.7°F and 84.2°F.
current
weather
weather
| Marco Island |
weather in
December
December
| Marco Island |
Best time for vacation in Marco Island
Marco Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Marco Island
Local time: 06:34
December 21, sunday
0900
66°F
SW
7 mph
7 mph
1200
70°F
SW
3 mph
3 mph
1500
72°F
E
7 mph
7 mph
1800
70°F
SE
11 mph
11 mph
2100
72°F
S
11 mph
11 mph
December 22, monday
0000
70°F
SW
13 mph
13 mph
0300
70°F
SW
13 mph
13 mph
0600
68°F
SW
16 mph
16 mph
