Cape Henlopen Sea Temperature in September

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

Average water temperature in Cape Henlopen for September

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

23.32° C

(73.98° F)

  • highest: 27.11° C (80.8° F)
  • lowest: 19.85° C (67.73° F)

Water at this temperature is very pleasant to swim in and if you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

Water temperature range by day in September in Cape Henlopen

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

Water temperatures for September in Cape Henlopen in recent years

Day 2024 2023 2022 2021
1 0° C 24.4° C 26.24° C 25.84° C
2 0° C 24.61° C 25.9° C 24.61° C
3 0° C 24.57° C 25.76° C 23.55° C
4 0° C 25° C 25.58° C 23.52° C
5 0° C 25.11° C 25.53° C 23.9° C
6 0° C 25.67° C 25.31° C 24.26° C
7 0° C 26.13° C 24.42° C 24.39° C
8 0° C 26.27° C 23.83° C 24.41° C
9 0° C 26.62° C 23.74° C 24.26° C
10 0° C 26.48° C 23.7° C 23.31° C
11 0° C 26.33° C 23.68° C 23.42° C
12 0° C 26.22° C 23.93° C 23.63° C
13 0° C 25.87° C 24.05° C 23.72° C
14 0° C 25.4° C 23.96° C 23.86° C
15 0° C 24.7° C 23.64° C 23.82° C
16 0° C 23.98° C 23.29° C 23.79° C
17 0° C 23.46° C 23.17° C 23.66° C
18 0° C 23.07° C 23.29° C 23.59° C
19 0° C 22.85° C 23.58° C 23.44° C
20 0° C 22.73° C 23.73° C 22.95° C
21 0° C 22.62° C 23.76° C 22.62° C
22 0° C 22.41° C 23.55° C 22.51° C
23 0° C 22.18° C 23.13° C 22.59° C
24 0° C 21.94° C 22.77° C 22.44° C
25 0° C 21.73° C 21.76° C 22.67° C
26 0° C 21.63° C 21.08° C 22.58° C
27 0° C 21.15° C 20.66° C 22.33° C
28 0° C 21° C 20.35° C 22.19° C
29 0° C 20.88° C 20.22° C 21.99° C
30 0° C 20.3° C 20.09° C 21.51° C

Water temperature in September for locations near Cape Henlopen

Lewes

United States, North America

3.12 miles away

Rehoboth Beach

United States, North America

5.77 miles away

Broadkill Beach

United States, North America

6.54 miles away

Dewey beach

United States, North America

7.70 miles away

Rehoboth Bay

United States, North America

9.82 miles away

Long Neck

United States, North America

13.01 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Cape Henlopen 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.

  • "Cape Henlopen Sea Temperature in September". SeaTemperatures.net. Accessed on May 4, 2024. http://seatemperatures.net/north-america/united-states/cape-henlopen-september-temperature/.

  • "Cape Henlopen Sea Temperature in September". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/cape-henlopen-september-temperature/. Accessed 4 May, 2024

  • Cape Henlopen Sea Temperature in September. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/cape-henlopen-september-temperature/.