All data are in degrees Fahrenheit

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Water temperature in Sullivans Island

Detailed information about the current water temperature in Sullivans Island. 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 Sullivans Island now

76.0

°F

May 20, 02:38

Trend:

increasing

Yesterday:

75.7°F

Tomorrow:

76.2°F

Sunrise:

06:17

Sunset:

20:15

Day Length:

13 h. 58 min.

Sullivans Island in May

Minimum:

48.3°F

Average:

58.5°F

Maximum:

66.0°F

Sea water temperature in Sullivans Island today

As of now, in Sullivans Island, the water temperature is 76.0°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.4°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 76.3°F on 2017, while the historical minimum was 72.6°F on 2014.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 77.3°F, with minimum temperature starting at 76.2°F, while the maximum might reach 78.1°F.

Daily water temperature in Sullivans Island

Date Current Year

actual* / forecast**

last year 10 years average
May 6 75.4°F 69.1°F 72.3°F
May 7 74.6°F 69.7°F 72.5°F
May 8 75.1°F 70.2°F 72.3°F
May 9 75.7°F 70.8°F 72.3°F
May 10 75.8°F 71.6°F 72.4°F
May 11 75.7°F 72.2°F 72.3°F
May 12 76.4°F 72.3°F 73.0°F
May 13 76.6°F 73.2°F 73.1°F
May 14 76.7°F 73.5°F 73.3°F
May 15 73.8°F 74.3°F 73.3°F
May 16 75.1°F 74.4°F 73.4°F
May 17 75.2°F 74.7°F 73.7°F
May 18 76.0°F 75.6°F 74.1°F
May 19 75.7°F 75.5°F 74.3°F
May 20 76.0°F 74.0°F 74.7°F
May 21 76.2°F 72.8°F 74.9°F
May 22 76.9°F 74.0°F 75.6°F
May 23 77.2°F 74.2°F 75.8°F
May 24 77.3°F 74.1°F 75.9°F
May 25 77.7°F 74.5°F 76.4°F
May 26 77.9°F 74.1°F 76.5°F
May 27 78.1°F 74.1°F 76.7°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 Sullivans Island by month

In Sullivans Island, the months May through October offer comfortable swimming conditions, which amounts to 157 swimming days.
The warmest water in Sullivans Island was recorded on August 22, 2016, reaching a 86.6°F. While the coldest temperature occurred on January 8, 2018, dipping to 47.0°F. The average readings by season are 57.8°F in Winter, 67.0°F in Spring, 82.5°F in Summer, and 73.9°F in Autumn.