Early autumn · Weather & things to do
Jacksonville Beach in September
Jacksonville Beach edges cooler than August, with highs of 82°F (28°C), lows of 78°F (26°C) and about 5.4 in (137 mm) of rain.
Our comfort score puts it mid-table at 68/100, 9th of 12.
- Avg high
- 82°F (28°C)
- Avg low
- 78°F (26°C)
- Rain
- 5.4 in (137 mm)
- Humidity
- 79%
- Cloud cover
- 59%
- Daylight
- ~12 h 10 min
- Comfort score
- 68/100 · Good
What September feels like
Highs settle around 82°F (28°C), warm enough for short sleeves.
Even at night it stays warm, around 78°F (26°C).
With 79% average humidity, it feels muggy.
Rain is a real factor, with about 5.4 in (137 mm) across the month.
Plan around September
September sits mid-table; the best months are February – May and November & December.
- Comfort improves from 58/100 in August to 68/100.
- Our Jacksonville New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clotheshighs average 82°F
- Quick-dry fabrics79% average humidity
- Rain jacket and waterproof shoesfrequent rain
- Comfortable walking shoesmost picks involve some walking
What to do in Jacksonville Beach in September
With 5.4 in of rain, these picks lean toward food, drink and places with a roof, with outdoor options when the weather breaks.
Metro Diner
Jacksonville-born diner, first opened in San Marco in 1992, known for fried chicken and waffles.
Why now A sit-down stop to wait out showers in a month with 5.4 in of rain.
Lemon Bar
Open-air beach bar at the end of Lemon Street in Neptune Beach, known for its frozen lemon drink.
Jax Beach Polar Plunge
The city's New Year's Day plunge into the Atlantic, held for over 30 years; more than 1,000 people went in for 2026.
Jacksonville Beach Pier
Long concrete fishing pier off the main beach, rebuilt after hurricane damage, with a small fee to walk out.
Nearby in September
- Downtown Jacksonville & Southbank in September~16 mi · highs 86°F, 5.8 in rain · 2°C (4°F) warmer by day, about as wet
- Amelia Island in September~27 mi · highs 82°F, 5.4 in rain · similar daytime temperatures, about as wet
- St. Augustine in September~28 mi · highs 84°F, 6.6 in rain · similar daytime temperatures, wetter
- Winter Park in September~117 mi · highs 85°F, 6.9 in rain · 2°C (3°F) warmer by day, wetter
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Jacksonville Beach in September: quick answers
Is September a good time to visit Jacksonville Beach?
It's middling, scoring 68/100. The best months are February – May and November & December, at up to 89. Expect highs of 82°F (28°C) and 5.4 in (137 mm) of rain.
How hot is Jacksonville Beach in September?
Average highs are 82°F (28°C) and average lows 78°F (26°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Jacksonville Beach in September?
Yes: about 5.4 in (137 mm) of rain falls across September on average, the 3rd-wettest month of the year. The annual total is about 46.6 in (1184 mm).
What should I pack for Jacksonville Beach in September?
Bring light, breathable clothes (highs average 82°F), quick-dry fabrics (79% average humidity), rain jacket and waterproof shoes (frequent rain) and comfortable walking shoes (most picks involve some walking).
More on Jacksonville Beach
Planning Jacksonville Beach in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.