Live Wet Bulb Globe Temperature for St. Thomas, updated every 15 minutes. St. Thomas packs a dense, hilly capital and a busy cruise harbor into a small footprint, so heat here is as much about concrete and shadeas it is about the weather.
Last updated July 9, 2026 · Live data refreshes every 15 min
St. Thomas is the commercial heart of the U.S. Virgin Islands, and its heat profile reflects that. Charlotte Amalie, one of the busiest cruise ports in the Caribbean, sits at the base of steep hills, its harbor-front a maze of concrete, asphalt, and reflective surfaces with limited shade. That's an urban heat island in miniature, and it can run a full threat tier hotter than the green ridgelines just above town.
Where St. Thomas runs hottest and coolest
The downtown core, Havensight, and Crown Bay cruise areas are the hot spots: paved, crowded, and sun-exposed, with heat lingering into the evening as the hardscape releases the day's load. By contrast, the interior hills and north-side beaches like Magens Bay catch more of the trade winds and sit under or beside vegetation, holding WBGT lower. The island's east-west ridge means a spot's exposure to the prevailing easterly breeze matters as much as its elevation.
Who should watch the number here
Cruise visitors arriving from cooler climates are unacclimatized and often spend their few hours walking the hottest, most exposed blocks. Treat every WBGT band one level more seriously for the first days in tropical heat, see acclimatization.
Dockworkers, taxi and tour operators, and vendors work long shifts on radiant pavement; WBGT-based rest-and-water pacing beats going by air temperature.
Hikers and beachgoers should note that a breezy 88°F at Magens can be safer than a calm, sunny afternoon downtown at the same temperature.
Local tip. On cruise-heavy, low-wind afternoons, the harbor-front is the place to respect the map most. When the trade winds are up, the whole island breathes easier.
How to read St. Thomas conditions
The card above samples near Charlotte Amalie, but St. Thomas's terrain makes location matter. Open the live map, hover across the island to feel the gradient, and click any point, a trailhead, a job site, a beach, to pin it and unlock guidance for your activity, age, and the surface underfoot. To understand what the number means, start withWhat is WBGT?
Frequently asked questions
What is the WBGT in St. Thomas right now?
The live card on this page shows the current WBGT near Charlotte Amalie, updated every 15 minutes. For any specific neighborhood, harbor, or trail, open the interactive map and hover or pin that exact spot.
Why does downtown Charlotte Amalie feel hotter than the hills?
The dense town core, concrete, asphalt, and reflective harbor-front surfaces with little shade, behaves as an urban heat island, running warmer than the vegetated hillsides above it. Cruise-ship days concentrate foot traffic through exactly these hottest, most exposed blocks.
Is it safe to do the Skyride or shop downtown midday in summer?
Usually yes with sensible precautions, but WBGT can reach the moderate or high band on calm, sunny afternoons. Carry water, use shade, and check the live reading before extended walking, especially cruise passengers arriving unacclimatized from cooler climates.