Current sea water temperature:
+84.0°F
| Minimum sea water temperature in September: | 85.6°F |
| Maximum sea water temperature in September: | 78.1°F |
| Average sea water temperature in September: | 82.5°F |
| more information | |
14 days
forecast
forecast
| Jacksonville |
monthly
weather
weather
| Jacksonville |
Sea water temperature for the last 10 days:
| September 14 | 84.0°F | September 9 | 83.7°F |
| September 13 | 83.8°F | September 8 | 83.1°F |
| September 12 | 84.4°F | September 7 | 83.3°F |
| September 11 | 84.0°F | September 6 | 83.3°F |
| September 10 | 83.7°F | September 5 | 82.6°F |
Monthly sea water temperature, °F
When is the warmest sea in Jacksonville?
Based on the data about daily sea water temperature for the last three years the warmest sea in Jacksonville was noticed in August, September and July.
Monthly Sea Temperatures in Jacksonville, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 82.2°F. The highest and lowest sea temperatures during the month were 83.7°F and 80.4°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 81.1°F. The highest and lowest sea temperatures during the month were 84.7°F and 78.1°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 84.5°F. The highest and lowest sea temperatures during the month were 86.0°F and 82.9°F.
current
weather
weather
| Jacksonville |
weather in
September
September
| Jacksonville |
Best time for vacation in Jacksonville
Jacksonville on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Jacksonville
Local time: 16:41
September 14, monday
1800
81°F
N
2 mph
2 mph
2100
82°F
NW
5 mph
5 mph
September 15, tuesday
0000
81°F
W
3 mph
3 mph
0300
79°F
W
2 mph
2 mph
0600
79°F
SW
4 mph
4 mph
0900
84°F
W
7 mph
7 mph
1200
91°F
W
11 mph
11 mph
1500
93°F
W
14 mph
14 mph
