All data are in degrees Fahrenheit

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Water temperature in Delaware City

Detailed information about the current water temperature in Delaware City. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Delaware City now

73.5

°F

September 18, 05:39

Trend:

decreasing

Yesterday:

73.7°F

Tomorrow:

73.4°F

Sunrise:

06:46

Sunset:

19:06

Day Length:

12 h. 20 min.

Delaware City in September

Minimum:

33.2°F

Average:

39.1°F

Maximum:

42.2°F

Sea water temperature in Delaware City today

As of now, in Delaware City, the water temperature is 73.5°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.1°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 76.4°F on 2019, while the historical minimum was 72.5°F on 2017.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 72.7°F, the minimum temperature may reach 71.5°F, and the maximum might stay at 73.4°F.

Daily water temperature in Delaware City

Date Current Year

actual* / forecast**

last year 10 years average
Sep 4 74.7°F 77.4°F 76.9°F
Sep 5 74.7°F 76.0°F 76.9°F
Sep 6 75.4°F 76.2°F 77.0°F
Sep 7 76.0°F 75.5°F 76.8°F
Sep 8 74.2°F 75.3°F 76.4°F
Sep 9 74.1°F 75.6°F 76.7°F
Sep 10 73.9°F 73.9°F 76.4°F
Sep 11 73.1°F 73.7°F 75.8°F
Sep 12 72.1°F 73.8°F 75.2°F
Sep 13 73.7°F 74.0°F 75.3°F
Sep 14 73.8°F 74.0°F 75.0°F
Sep 15 73.6°F 74.8°F 75.3°F
Sep 16 74.1°F 74.9°F 74.7°F
Sep 17 73.7°F 74.5°F 74.6°F
Sep 18 73.5°F 74.2°F 74.6°F
Sep 19 73.4°F 73.7°F 74.6°F
Sep 20 73.4°F 74.0°F 74.6°F
Sep 21 73.1°F 73.2°F 74.2°F
Sep 22 72.7°F 73.2°F 73.8°F
Sep 23 72.6°F 74.0°F 73.7°F
Sep 24 72.1°F 72.7°F 73.2°F
Sep 25 71.5°F 72.0°F 72.6°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Delaware City by month

In Delaware City, the months July through September offer comfortable swimming conditions, which amounts to 96 swimming days.
The warmest water in Delaware City was recorded on July 12, 2024, reaching a 86.5°F. While the coldest temperature occurred on January 24, 2025, dipping to 32.0°F. The average readings by season are 39.6°F in Winter, 52.4°F in Spring, 77.6°F in Summer, and 64.8°F in Autumn.