You’ve probably heard the jokes about Florida "winters." People think it’s just perpetual sunshine and 80-degree humidity, but honestly, anyone living in Port St. Lucie knows that’s not exactly the whole story. Especially this morning.
If you stepped outside early on Saturday, January 17, 2026, you likely felt that distinct, damp chill that catches you off guard. It’s 55°F right now. That might sound like t-shirt weather to someone in Maine, but with the humidity sitting at a heavy 87%, it feels a lot stickier and colder than the number suggests.
Basically, it's one of those mornings where you need a light jacket for the coffee run, but you'll probably be tossing it in the backseat by lunchtime.
The Reality of Port St. Lucie Weather Today
The sky is currently cloudy, which is typical for these mid-January stretches. There’s a light wind coming out of the north at 6 mph. It’s not a gale by any means, but it’s enough to keep the air moving.
🔗 Read more: Finding the Right Word That Starts With AJ for Games and Everyday Writing
Here is what the rest of your Saturday looks like:
- High Temperature: 75°F (hitting later this afternoon)
- Low Temperature: 53°F
- Conditions: Partly sunny by day, returning to cloudy tonight
- Rain Chance: 20% during the day; dropping to 10% tonight
- UV Index: 3 (Moderate)
- Wind Shift: Northeast at 9 mph as the day progresses
That 20% chance of rain is kinda the "Florida wildcard." It’s not enough to cancel your plans at Tradition or the Botanical Gardens, but it’s enough that you might see a stray shower move through quickly. Most of the day will be partly sunny, so you'll actually get some decent light.
Why the humidity matters right now
A lot of visitors think 75°F is the "perfect" temperature. In Port St. Lucie, 75°F with 70% humidity (the daily average today) feels different. It’s soft air. It’s great for the plants, but it can make the afternoon feel a bit more "closed in" compared to a dry desert heat.
💡 You might also like: Is there actually a legal age to stay home alone? What parents need to know
With a UV index of 3, you aren't going to sizzle in ten minutes, but don't let the clouds fool you. You can still catch a burn if you’re out on the water or hitting the golf course for three hours. The sun still has teeth in January.
What to do with this forecast
Honestly, today is a transition day. We’re coming off a warmer stretch and heading into a period that local meteorologists, like those over at WPTV, have been watching closely. A cold front is expected to "flip the script" by tomorrow night, meaning today is your best window for outdoor errands.
If you’re heading out to the beach or taking the boat out, the marine forecast shows southeast winds around 5 knots, becoming southwest. Seas are calm at about 1 to 2 feet. It's smooth on the intracoastal.
📖 Related: The Long Haired Russian Cat Explained: Why the Siberian is Basically a Living Legend
Actionable Steps for Port St. Lucie Residents:
- Morning Layering: Start with a hoodie. The 55°F start is chilly, but you'll want to be down to a polo or tee by 2:00 PM when we hit that 75°F peak.
- Yard Work Window: Do it today. With a 20% rain chance, it’s much safer to mow or trim the palms now before the "unsettled" weather expected early next week.
- Hydration: Even though it’s "cooler," that 70-87% humidity range will dehydrate you faster than you think if you’re active.
- Marine Plans: Today is the day for the boat. Conditions are forecasted to get much rougher (3 to 6 feet) by Sunday afternoon.
Enjoy the partly sunny breaks while they last. It’s a classic, mild Florida winter day—just don't forget where you parked your jacket when the sun goes down and we head back toward that 53°F low.