The average surface water temperature in Myrtle Beach is essentially constant during July, remaining within 1°F of 81°F throughout. You can choose the units of measurement for displaying data - in Celsius or Fahrenheit. August is the month for swimming in the beautiful ocean at Myrtle Beach as the water temperature reaches its’ high of 83°F.And the summery hot air temperature of up to 87°F will certainly make you want to cool down from time to time. The average high air temperature during July is around 91°F, with the low around 72°F. Get the monthly weather forecast for Myrtle Beach, SC, including daily high/low, historical averages, to help you plan ahead. December average water temperature in North Myrtle Beach is 17°C/62.6°F, the minimum temperature is 11.9°C/53.4°F, and the maximum is 20.9°C/69.6°F. Average water temperature in Myrtle Beach in July is 27.7°C/81.9°F and therefore suitable for comfortable swimming. Home; North America; United States; South Carolina; Myrtle Beach; Myrtle Beach Sea Temperature (Today) Dec 2020. Marine / ocean climate data updated daily, surface sea temperatures and recorded in degrees centigrade and farenheit. This section reports on the wide-area average surface temperature of that water. Based on our historical data over a period of ten years, the warmest water in this day in North Myrtle Beach was recorded in 2015 and was 19.4°C/66.9°F, and the coldest was recorded in 2018 at 12.7°C/54.9°F. Myrtle Beach sea surface temperature in summer. You can also view information about water temperature for other months. Daytime highs of 88°F will really call for a trip to the water to cool down. Average monthly sea temperatures in Myrtle Beach Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec °C: 15.9: 14.4: 14.3: 17.8: 21.5: 25.6: 27.7: 28.2: 26.9: 24.6: 20.5: 17.4 °F: 60.6: 57.9: 57.7: 64: 70.7: 78.1: 81.9: 82.8: 80.4: 76.3: 68.9: 63.3 Humidity: 74%. July is the hottest month at Myrtle Beach. The average air temperature in July is around 91º, making it perfect conditions for outdoor activities like golf, going to the beach, outdoor shopping, and more. Low Temp: 37 °F. Number of days in July when the temperature in Myrtle Beach rose to at least 70 or 90 degrees Fahrenheit; Year 70 °F 21 °C 90 °F 32 °C; 2020: 31: 19: 2019: 31: 8: 2018: 31: 2: 2017: 31: 8: 2016: 31: 15: 2015: 31: 11: 2014: 31: 4: 2013: 31: 1: 2012: 31: 18: 2011: 31: 10: 2010: 31: 16: Rain. We went down the 2nd week of June a couple of years ago and the only problem was that it was too cool to swim at night in the outdoor pools. July is the hottest month overall for this vacation destination, with temperatures peaking from the 15th to 19th. The average surface water temperature in Myrtle Beach is essentially constant during July, remaining within 1°F of 81°F throughout. Today's Myrtle Beach (SC), United States water temperature. As a result, you will be able to get a fairly accurate idea about the average water temperature in July. The warmest sea in Myrtle Beach in August is 29.5°C/85.1°F, and the coldest sea temperature in August is 26.2°C/79.2°F. Water temperature forecasts for the long term tend to be misleading. Myrtle Beach (The Yachtsman Pier) sea temperatures peak in the range 27 to 29°C (81 to 84°F) on around the 23rd of July and are at their minimum on about the 4th of March, in the range 18 to 22°C (64 to 72°F). A day that hot is a once-in-a-decade event. 61° 51° 3.45" March. Sea water temperature in North Myrtle Beach is expected to rise to 16.7°C/62.1°F in the next 10 days. Africa Asia Aus & Pacific Europe Latin America N America S America Mid East. Plus, the average water temperature is around 83º, which is awesome for swimming in the ocean! And that doesn’t only relate to the temperature but also the entertainment on offer! Photos will be available to all users after verification by the moderator. Water temp will be low 80's in August. Myrtle Beach is located near a large body of water (e.g., ocean, sea, or large lake). Temperatures can climb to 90 °F or above anytime from May to September. Average high air temperature in Myrtle Beach in July is 88°F/31°C, and average low air temperature is 73°F/23°C. Africa Asia Aus & Pacific Europe Latin America N America S America Mid East. Compare two years using the chart below. 82° 73° 3.20" June. Dew Point: 54 °F. The warmest sea in North Myrtle Beach in July is 30.1°C/86.2°F, and the coldest sea temperature in July is 26.3°C/79.3°F. The warmest sea in Myrtle Beach in July is 30°C/86°F, and the coldest sea temperature in July is 26.3°C/79.3°F. Year round warm sea temperatures at Surfside Pier climb to their warmest in late July. 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