Cudjoe Key Sea Temperature in September

Looking to find out what the average sea water temperature in Cudjoe Key is for September? Find out what the lowest, highest, and average water temperatures are for Cudjoe Key over the past 10 years.

Average water temperature in Cudjoe Key for September

The average, high, and low temperatures below should help you if you can swim in the water in Cudjoe Key in September.

29.91° C

(85.83° F)

  • highest: 31.56° C (88.81° F)
  • lowest: 27.6° C (81.68° F)

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Water temperature range by day in September in Cudjoe Key

The chart below shows the range of low and high temperatures by day for the month of September in Cudjoe Key.

Water temperatures for September in Cudjoe Key in recent years

Day 2024 2023 2022 2021
1 0° C 30.25° C 31.08° C 29.93° C
2 0° C 30.01° C 31.12° C 29.83° C
3 0° C 30.16° C 31.05° C 29.95° C
4 0° C 29.31° C 31.05° C 30.43° C
5 0° C 29.59° C 31.07° C 30.49° C
6 0° C 29.68° C 31.02° C 30.51° C
7 0° C 29.85° C 31.15° C 30.52° C
8 0° C 29.85° C 31.11° C 30.32° C
9 0° C 30° C 30.9° C 30.72° C
10 0° C 30.31° C 30.86° C 30.85° C
11 0° C 30.48° C 30.93° C 30.8° C
12 0° C 30.75° C 31.02° C 30.71° C
13 0° C 30.9° C 30.96° C 30.49° C
14 0° C 31.03° C 30.82° C 30.14° C
15 0° C 31.09° C 30.83° C 30.04° C
16 0° C 31.21° C 30.87° C 29.97° C
17 0° C 31.26° C 30.47° C 29.8° C
18 0° C 31.22° C 29.96° C 30.15° C
19 0° C 31.26° C 29.79° C 30.32° C
20 0° C 31.21° C 29.86° C 30.21° C
21 0° C 30.97° C 30.03° C 30.14° C
22 0° C 30.81° C 30.11° C 29.97° C
23 0° C 30.68° C 30.25° C 30.05° C
24 0° C 30.35° C 30.52° C 30.19° C
25 0° C 30.09° C 30.61° C 30.47° C
26 0° C 30.15° C 30.69° C 30.62° C
27 0° C 29.98° C 30.57° C 30.66° C
28 0° C 29.85° C 29.71° C 30.29° C
29 0° C 30.02° C 29.02° C 30.21° C
30 0° C 29.92° C 28.66° C 30.02° C

Water temperature in September for locations near Cudjoe Key

Sugarloaf Key

United States, North America

4.29 miles away

Ramrod Key

United States, North America

5.35 miles away

Big Pine Key

United States, North America

9.07 miles away

Big Coppitt Key

United States, North America

11.40 miles away

Bahia Honda

United States, North America

15.31 miles away

Stock Island

United States, North America

16.67 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Cudjoe Key comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "Cudjoe Key Sea Temperature in September". SeaTemperatures.net. Accessed on May 4, 2024. http://seatemperatures.net/north-america/united-states/cudjoe-key-september-temperature/.

  • "Cudjoe Key Sea Temperature in September". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/cudjoe-key-september-temperature/. Accessed 4 May, 2024

  • Cudjoe Key Sea Temperature in September. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/cudjoe-key-september-temperature/.