What is the current water temperature in Sullivans Island?

As of now, in Sullivans Island, the water temperature is 27.25°F. It's safe to say that the water is comfortably warm for various water-related activities.

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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.

81.1

°F

June 14, 19:23

Trend:

stable

Yesterday:

80.7°F

Tomorrow:

80.8°F

Sunrise:

06:11

Sunset:

20:28

Day Length:

14 h. 17 min.

Sullivans Island in June

Minimum:

48.1°F

Average:

56.3°F

Maximum:

63.6°F

Sea water temperature in Sullivans Island today

As of now, in Sullivans Island, the water temperature is 81.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.9°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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 81.3°F on 2016, while the historical minimum was 77.6°F on 2023.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 81.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Sullivans Island

Date	Current Year actual* / forecast**	last year	10 years average
May 31	81.7°F	77.5°F	78.0°F
Jun 1	80.4°F	77.6°F	77.8°F
Jun 2	80.5°F	76.3°F	77.9°F
Jun 3	78.0°F	76.7°F	77.8°F
Jun 4	77.2°F	77.6°F	78.0°F
Jun 5	76.6°F	77.6°F	78.2°F
Jun 6	76.4°F	79.3°F	78.4°F
Jun 7	76.7°F	79.1°F	78.5°F
Jun 8	77.5°F	79.7°F	78.9°F
Jun 9	78.0°F	79.6°F	79.1°F
Jun 10	78.7°F	80.8°F	79.6°F
Jun 11	79.4°F	80.4°F	79.6°F
Jun 12	79.9°F	80.9°F	80.2°F
Jun 13	80.7°F	79.8°F	80.2°F
Jun 14	81.1°F	79.6°F	80.1°F
Jun 15	80.8°F	79.2°F	79.9°F
Jun 16	81.0°F	79.4°F	80.1°F
Jun 17	81.3°F	79.3°F	80.4°F
Jun 18	81.6°F	79.6°F	80.7°F
Jun 19	81.3°F	80.6°F	80.4°F
Jun 20	81.8°F	82.3°F	80.9°F
Jun 21	81.8°F	82.0°F	80.9°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 155 swimming days.

The warmest water in Sullivans Island was recorded on August 1, 2025, reaching a 86.8°F. While the coldest temperature occurred on January 26, 2025, dipping to 44.1°F. The average readings by season are 55.9°F in Winter, 67.1°F in Spring, 82.7°F in Summer, and 73.5°F in Autumn.