Myrtle Beach Lagoon — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Myrtle Beach Lagoon, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Myrtle Beach Lagoon today is 31°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 29.6°C | 29.0°C | |
| AUG 5 | 29.6°C | 29.0°C | |
| AUG 6 | 30.2°C | 29.0°C | |
| AUG 7 | 30.3°C | 29.0°C | |
| AUG 8 | 30.4°C | 29.0°C | |
| AUG 9 | 30.4°C | 29.0°C | |
| AUG 10 | 30.6°C | 29.0°C | |
| AUG 11 | 30.7°C | 29.0°C | |
| AUG 12 | 29.0°C | 30.9°C | |
| AUG 13 | 29.0°C | 30.8°C | |
| AUG 14 | 29.0°C | 30.7°C | |
| AUG 15 | 29.0°C | 30.6°C | |
| AUG 16 | 29.0°C | 30.5°C | |
| AUG 17 | 29.0°C | 30.4°C | |
| AUG 18 | 29.0°C | 30.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 6°C | 11°C | 16°C |
| February | 4°C | 10°C | 16°C |
| March | 8°C | 15°C | 21°C |
| April | 14°C | 18°C | 23°C |
| May | 19°C | 24°C | 29°C |
| June | 21°C | 27°C | 32°C |
| July | 22°C | 28°C | 34°C |
| August | 24°C | 29°C | 34°C |
| September | 23°C | 28°C | 32°C |
| October | 19°C | 24°C | 28°C |
| November | 11°C | 16°C | 20°C |
| December | 7°C | 11°C | 15°C |
Myrtle Beach Lagoon: Water Temperature by Location
Myrtle Beach Lagoon: Weather Forecast
August 12
August 13
August 14
August 15
Location & Local Information
The lagoons and small lake-like estuaries in the Myrtle Beach area of South Carolina experience a noticeable seasonal swing in water temperature. In winter (December–February) surface temperatures commonly sit around 50–60°F (10–16°C). Spring (March–May) brings a steady rise, typically into the 60–70°F range (16–21°C). Summer (June–August) is the warmest period, with waters often reaching 75–85°F (24–29°C) or slightly higher on hot, calm days. In fall (September–November) temperatures generally cool from the low 70s down into the mid-to-high 60s °F (21–18°C), depending on storms and cold fronts. Because these are shallow, sheltered bodies connected to tidal creeks and the ocean, short-term fluctuations with weather, freshwater runoff, and tidal exchange are common.
Swimming is allowed in many public beach and park access areas, and the warm summer temperatures make recreational swimming comfortable during that season. However, not all lagoons or lakes are open for bathing: some are privately owned, designated for wildlife habitat, or subject to advisories due to poor water quality, strong currents near inlets, submerged vegetation, or lack of lifeguards. For safety and environmental reasons it’s best to use designated swimming areas, heed posted signs and local advisories, and be mindful that cooler months may be uncomfortable or unsafe for prolonged exposure.