What is the current water temperature in Sullivans Island?

Q: What is the current water temperature in Sullivans Island?

As of now, in Sullivans Island, the water temperature is 8.25°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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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.

46.9

°F

February 8, 23:51

Trend:

increasing

Yesterday:

46.1°F

Tomorrow:

46.9°F

Sunrise:

07:09

Sunset:

17:58

Day Length:

10 h. 49 min.

Sullivans Island in February

Minimum:

51.0°F

Average:

56.9°F

Maximum:

67.6°F

Sea water temperature in Sullivans Island today

As of now, in Sullivans Island, the water temperature is 46.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 8.5°F lower 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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably 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 61.6°F on 2016, while the historical minimum was 52.4°F on 2021.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 47.2°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
Jan 25	54.2°F	46.5°F	54.0°F
Jan 26	54.1°F	44.1°F	53.6°F
Jan 27	50.4°F	44.2°F	53.4°F
Jan 28	49.5°F	45.2°F	53.4°F
Jan 29	50.2°F	45.8°F	53.3°F
Jan 30	48.7°F	46.9°F	53.4°F
Jan 31	47.7°F	47.9°F	53.2°F
Feb 1	47.8°F	47.7°F	53.1°F
Feb 2	46.1°F	48.6°F	53.2°F
Feb 3	45.5°F	49.2°F	53.1°F
Feb 4	44.9°F	51.0°F	53.3°F
Feb 5	45.7°F	52.6°F	53.7°F
Feb 6	46.0°F	52.3°F	54.0°F
Feb 7	46.1°F	54.2°F	54.2°F
Feb 8	46.9°F	54.8°F	55.3°F
Feb 9	46.9°F	56.8°F	55.4°F
Feb 10	46.6°F	56.4°F	55.1°F
Feb 11	47.0°F	56.8°F	55.5°F
Feb 12	47.4°F	56.8°F	55.9°F
Feb 13	48.0°F	56.4°F	56.4°F
Feb 14	47.4°F	55.7°F	55.9°F
Feb 15	47.1°F	56.0°F	55.6°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 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 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 56.1°F in Winter, 67.2°F in Spring, 82.7°F in Summer, and 73.5°F in Autumn.