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K38 and 39 Water Temperature and Wetsuit Guide

(Rhode Island, USA)

Today's K38 and 39 sea temperature is 12.7 °C.

Statistics for 25 May (1981–2005) – mean: 12.2 °C, range: 9.8 °C to 14.8 °C

The water temperature (12 °C) at K38 and 39 is quite cold. If the sun shines as forecast, it should feel warm enough to get away with a good sealed spring wetsuit but you won't overheat in a winter wetsuit, gloves boots and a hood. Effective windchill factor of (12 °C).

United States Sea Water Temperature

Map of current United States
Surface Water Temperatures
based on measurements from oceanographic satellites
United States Water Temperature Anomaly

Map of current United States
Sea Water Temperature Anomalies

(compared with long term averages
at this time of year)

(click thumbnails to expand)

Below is a graph of Historical Sea Surface Temperature for K38 and 39. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

K38 and 39 Water Temperature Graph

All of the graphs for the surf breaks presented on are on the same scale to enable comparison between locations around the world.

K38 and 39 water temperatures peak in the range 20 to 24°C (68 to 75°F) on around the 8th of August and are at their minimum on about the 23rd of February, in the range 3 to 6°C (37 to 43°F). K38 and 39 water temperatures are warmest in early to mid August. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. The minimum water temperatures at K38 and 39 mean that you will need a flexible 6/5/4mm wetsuit or a well fitting 5/4mm wetsuit with gloves and 5mm neoprene booties and a hood to surf here in the fourth week of February.

Actual sea surface water temperatures close to shore at K38 and 39 can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at K38 and 39. Refer to our detailed weather forecasts for this information.