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Honestly, if you're looking at the st augustine 10 day weather forecast for this week in January 2026, you've probably noticed it’s a bit of a rollercoaster. One minute you’re walking down St. George Street in a t-shirt, and the next you’re digging through your suitcase for that "just in case" hoodie.
Right now, St. Augustine is sitting at a humid 60°F tonight. It’s mostly cloudy with a light southeast wind at 6 mph. But don't let the calm night fool you. Tomorrow, Sunday, January 18, is going to be a total wash.
We’re looking at a 75% chance of rain during the day with a high of 56°F. It’s not just the rain, though; the wind is going to kick up to 18 mph from the northwest. Basically, it’s the kind of day where you skip the beach and hide out in the Lightner Museum or grab a coffee at Kookaburra.
Navigating the St Augustine 10 Day Weather Forecast This Week
The real shocker is Sunday night into Monday. The temperature is expected to crater to 35°F. That’s a massive swing from the 69°F high we saw today, Saturday, January 17.
Monday, January 19, will be beautiful and sunny, but you’ll definitely feel the bite with a high of only 53°F. It stays cool for a few days. Tuesday keeps that 53°F high, and honestly, the northwest and north winds around 9-10 mph will make it feel even crispier.
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What the Locals Know About January Coastal Weather
If you’ve spent any time on Florida’s Historic Coast, you know the Atlantic Ocean acts like a giant mood ring.
In January, the humidity often stays high—it's around 83% right now—which makes the cold feel "wet." It gets into your bones. Experts at the National Weather Service in Jacksonville are actually watching for a surge of Arctic air toward the end of the month.
Models suggest the Polar Vortex might weaken, which often means colder-than-average temps for us here in Northeast Florida.
- UV Index: It’s low (around 1 to 3) this week, but don't skip the sunscreen. The Florida sun is deceptive even when it's 50 degrees out.
- Rain Patterns: After Sunday’s soak, things dry out significantly. Monday through Friday shows a 10% or lower chance of rain.
- The Turnaround: By next Saturday, January 24, we’re back to 74°F. That’s St. Augustine for you.
Why Your Packing List Needs a Strategy
Most people get the packing wrong. They see "Florida" and think flip-flops.
While you might use them by next weekend, you’ll regret not having real shoes on Monday. I’d suggest layering lightweight long-sleeve shirts with a medium-weight jacket.
You’ll want something wind-resistant for those days when the north wind is blowing off the Matanzas River. A light scarf isn't a bad idea either for those chilly morning walks past the Castillo de San Marcos.
Actionable Tips for Your Trip
- Monitor Sunday's Wind: If you're planning on a scenic cruise or boat tour, Sunday, January 18, is likely a no-go with those 18 mph gusts.
- Plan Indoor Stays Early Week: Save the outdoor exploration for Friday and Saturday (Jan 23-24) when temps climb back into the high 60s and 70s.
- Check the Dew Point: When the humidity hits 100% (like it's forecast to on Monday, Jan 26), even a "warm" 64°F day can feel pretty damp and heavy.
Basically, keep an eye on that st augustine 10 day weather forecast because it’s shifting fast. You're moving from a 35°F low on Monday to a 74°F high just five days later. It's wild, but that's just winter in the nation's oldest city.
For the most comfortable experience, prioritize your outdoor activities for the window between Friday, January 23 and Sunday, January 25, when the temperatures stabilize in the low 70s before the next potential rain system moves in on the 26th.