Planning a September trip to Long Beach Island NJ? See typical LBI September weather and ocean temperatures, plus save 15% on linen and towel rentals with Pack Lite

Thinking about a September getaway to Long Beach Island, NJ? Don’t pack away the beach bag just yet! September can be one of the nicest times of year to visit LBI, with warm days, fewer crowds and ocean water that often remains surprisingly comfortable.

Is It Warm Enough to Swim in LBI in September?

Quite often, yes! Historical data puts the average September ocean temperature around Long Beach Island at about 72°F, with warmer water especially possible earlier in the month.

In fact, the National Weather Service reported water temperatures around 70°F at LBI beaches on September 5, 2026, along with an afternoon high around 80°F.

That means September can still bring plenty of opportunities for beach days, swimming, surfing and long walks along the ocean — without the peak-season crowds.

What Should You Pack for LBI in September?

September weather can change quickly, so layers are your friend. Pack shorts and bathing suits for warm afternoons, but add a sweatshirt or light jacket for cooler mornings and evenings.

And if you’d rather not fill the car with sheets, blankets and bath towels, Pack Lite is open all year!

We provide linen and towel rentals throughout Long Beach Island, including Beach Haven, Ship Bottom, Surf City, Harvey Cedars, Barnegat Light and more — with FREE delivery and pickup.

🍂 September Special: Save 15% with code FALL15

A quieter island, warm ocean water, beautiful beach weather and 15% off your Pack Lite rental? September might just be one of LBI’s best-kept secrets.

Pack lighter. Vacation easier. Enjoy LBI this fall.