Oahu Weather Information
Put simply, Oahu weather is awesome. Whether you’re staying on its Windward Coast or Leeward Coast, you’re in store for pleasant temperatures both on land and in the water, as well as plenty of sun, cool breezes, and moderate humidity.
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The typical temperature on Oahu is in the mid-70’s. There are only two seasons here, winter and summer, and both are relatively mild compared to most other locales. For instance, lows in January, the coldest month, rarely dip below the 60’s, while average highs hover around 80 degrees. Meanwhile, highs in August and September, the hottest months, usually stop before hitting 90 degrees. Humidity is a pleasant 50% year-round. In other words, freezing winter nights and muggy 100-degree summer days alike are extremely infrequent.
As with most of the Hawaiian Islands, Oahu weather Western or Leeward Coast is hotter and more arid than its Eastern or Windward Coast, which is quite green and fairly wet. To put things in perspective, the southwestern cities of Honolulu and Waikiki receive on average no more than 20 inches of rainfall per year, whereas the eastern cities of Kaneohe, Kailua, and Waimanalo can top three times that amount. The rainiest area on Oahu is the mountainous area just off of the Windward Coast; annual rainfall in these parts can sometimes top 200 inches!
Another interesting fact is that the waters surrounding Oahu are very comfortable, just like Oahu weather. Heated by the constant sun, they typically read from about 70-to-80 degrees, depending on the season. It’s for this reason that water sports such as scuba diving, snorkeling, and surfing are so popular on the island.
On a side note, if you’re coming to surf, the winter seasons, especially November through February, are best. Generally speaking, the biggest waves can be found on the northern coast around Waimea Bay, when winter storms create enormous, powerful waves that are well over 30 ft. high. Rumor has it, however, that those of Kaena Point on Oahu’s Leeward Coast are even bigger!
By contrast, the sea subsides during the summer months, meaning that beach goers, novice surfers, scuba divers, and snorkelers will find conditions much more accommodating from May onward. With less overall water movement, the Pacific Ocean becomes clearer and easier to navigate, making it easier to learn sports and explore the reefs, caverns, sea animals, and wrecks below the surface.
The long and short of it, then, is that few places can compare to Oahu weather. It is a true paradise island, abundant in lush greenery, warm temperatures, moderate humidity, and gentle breezes. So if you’re searching for a place where you can unwind outside without putting on a coat or breaking a sweat, say hello to Oahu!
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