Today's Fort Sebastian sea temperature is 28.1 °C
(Normal for this time of year)
| Mean: | 27.8 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 26.9 °C to 28.6 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 09 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a rashvest wetsuit.
Sunny with very warm air temperatures, feeling like 27 °C once we account for any wind. Sea temperatures (28 °C) very warm too. Staying comfortable in the water at Fort Sebastian won't be a problem, but wear at least a rash-vest to keep the UV off.
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Below is a graph of Historical Sea Surface Temperature for Fort Sebastian. 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.

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.
Fort Sebastian sea water temperatures peak in the range 28 to 30°C (82 to 86°F) on around the 5th of May and are at their coldest on about the 11th of August, in the range 23 to 26°C (73 to 79°F). Year round warm sea water temperatures at Fort Sebastian climb to their highest at the beginning of May. Even then a rash vest and board shorts should be fine for surfing at any time of year. Fort Sebastian sea water temperatures are always warm but dip to their coldest in the second week of August. You'll need a 2mm neoprene top or a shorty at dawn/dusk or if it's windy.
Actual sea surface water temperatures close to shore at Fort Sebastian 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 Fort Sebastian. Refer to our detailed weather forecasts for this information.


