After viewing the chart, it's apparent that if you want to take a swim in the Atlantic during your Outer Banks vacation, then you should definitely plan your visit during the months of May through October.
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Outer Banks Weather in MayThe temperature is perfect during the spring months with sunshine and comfortable temperatures in the 60s and 70s. The warm temperatures are ideal for sunbathing on the beach or by the pool, but be mindful that the ocean water may still be a little chilly.
The weather on the Outer Banks in October is ideal: mild during the day, with cool, comfortable nights. The average high temperature in October is 72°, and the average low is 58°. The ocean temperature is 70° on average, which is still warm enough for swimming or surfing.
The ocean temperature is generally warm on the Outer Banks in September, between 75 and 80 degrees, which is perfect for swimming. Many days of the month, the ocean water is crystal clear and looks quite tropical.
The best time to visit the Outer Banks is between March and May or September and November, when lodging rates drop and crowds dissipate. Most mainland North Carolina residents and out-of-towners arrive during the summer months, when humidity is high and average temperatures consistently hit the upper 80s.
Our favorite time of year to go to the NC beaches IS October & yes, you can swim (unless you are a 'bathwater-only' swimmer, in which case you would be limited to July & August).
Autumn really is an amazing time to visit the Outer Banks. When you're packing for the Outer Banks, be sure to take a look at the weather forecast, but take it with a grain of salt. No matter what time of year you visit, bring sunscreen, bug repellent, a cozy sweater and a rain jacket or umbrella, just in case.
The Outer Banks is filled to the brim with fun and exciting things to do. You could comfortably spend a week exploring the island for sure. But with the best itinerary in place, you can easily hit all of the island's highlights in a span of 3 to 4 days.