⏱️ 5-7 min read
Is September a Good Time to Visit Okinawa?
Yes — but September is the month where the weather is the wild card.
It can be incredible. Warm water, long days, fewer crowds. But it’s also right in the middle of typhoon season, and that means some trips go smoothly –and some get a little rearranged.
If you’re OK with adjusting plans last minute, September can still be a good time to visit Okinawa.
September in Okinawa: What it Feels Like
You already know it’s hot. Not cute summer hot—muggy, sticky hot. Salt’s already on your skin before you’ve even made it to the water, and your hair is doing whatever it wants.
Looking back through my camera roll, September really had two flavors.
Either I was snapping another incredible Okinawa sunset after a day out snorkeling… or we were taking shelter as another typhoon whipped across the island. (They prefer weekends, just FYI.)
Typhoon season is unpredictable, and September can be busy for storms.
One year, we got nailed every weekend. Another year, almost nothing. When you’re planning months out, it’s hard to know which version of September you’ll get. If you just want the skinny on what typhoon season is actually like (and how much it really impacts your trip), I break it all own here →
Oh, and the heat is real but the humidity slacks from August…just slightly. If you’re not used to heat + humidity + high UV, it’ll wipe you out by midday.
Which is why my September camera roll is basically sunsets—we’d adventure in the morning, disappear into the AC mid-day, then head back out in the evening.
September at a Glance (Weather, Crowds, What to Expect)
- 🌤️ Weather:
- Full summer conditions (hot, humid)
- Typhoon risk: Real – but unpredictable
- 🌡️ Average Temperature: ~84°F (feels warmer with humidity)
- 🌊 Ocean Temperature: ~84°F
- ☂️ Rain Frequency: Comes and goes — quick showers or full storm systems
- 💦 Humidity Level: High (slight dip from August)
- 🤿 Ocean Conditions: Variable – check conditions before heading out
- 👥 Crowds: Decreasing (start of shoulder season)
What to Do in Okinawa in September (and What Not to Miss)
Water Activities
Like August, the water is warm—almost bathwater warm. The kind where you can stay in all day.
Weekends, not wrecked by typhoons, we’re usually snorkeling, or just hanging out at the resort pools (you can get a day pass without having to stay at the resort.)
It’s alluringly beautiful with endless adventure – but always check the conditions before heading out into the ocean. Things can change quickly depending on if a storm is brewing off shore.
And if you do hop into the ocean—be aware of the habu jelly – the warm water brings them in, they can pack a powerful sting and will definitely change your original plans.
Busena Marine Park Underwater Observatory
If the ocean feels a bit too dicey (or warm) for your taste, but you still want to experience the clear water and incredible wildlife – check out Busena Marine Park→
Glass bottom boat, reef views, and an underground tower where you can watch the wildlife along the reef through portholes—kind of like an upside-down lighthouse into the ocean.
We’ve spent a few hours here and never left disappointed—parrot fish, anemone fish, octopus, trumpet fish… everything you’d see snorkeling – just without getting wet or worrying about sea conditions.
A few tips:
- glass bottom boat tours were in Japanese when we went (still totally worth it)
- the underwater tower is at-your-own-pace with no guide
- if you get motion sick, plan ahead with seasickness meds (though the fish would love the snack)
Tataki Falls
If it hasn’t rained recently, this is the only hike I’ll bother doing in September. Part of that is I’m a fair-weather hiker, but also, I mentioned the heat, right?
This one works because you’re in the water the whole time. You hike through the creek bottom and end at a waterfall.
Wear shoes you’re OK with getting wet, because that’s 100% happening. The cool water makes the whole experience pleasant, and most of the trail is shaded. (But also, bring that bug spray.)
There have been reports of pets getting sick because the water is not safe to drink, so we’ve always hiked with caution and left the pups at home.
Rycom Mall
And then, some days it’s just too hot to be outside — or the typhoons are wrecking outdoor plans. That’s when Rycom becomes the plan.
Coffee, wandering, random shopping – and a super neat aquarium right inside with native fish. We’ve seen a huge parrot fish, moray eel, and shark.
And if you hang out you may even get lucky to see the fish being fed.
It’s right between LOFT (find the cutest Japanese stationary and gifts here) and the Pokemon store that always seems to have a line out the door.
My husband found his favorite watch at Rycom Mall, the Godiva drinks are absolutely worth it, and the food court will tour you through Asia and back to Japan.
There’s even a rooftop escape room that has kept us busy for hours multiple times. (Reservations recommended)
Don’t Miss
- Pool passes for local resorts
- Exploring American Village, Fireworks start at 8P
- Diving with manta rays on nearby island (e.g. Ishigaki)
Visiting Okinawa in September is an ideal fit for –
- People who can stay flexible, and not panic if a storm ends up off shore
- Beach lovers who want warm water without peak crowds
- Travelers who don’t need perfect weather every day
How to Handle the Okinawa Heat
I’m not going to sugar-coat it. It’s beautiful, and it’s hot.
But the heat is survivable — the key is a loose UV shirt over your swimsuit (Land’s End has great ones).
When we were island exploring or beach wandering, I’d dip my UV shirt in the water, wring it out, and throw it back on damp. The breeze will act like your own mini AC with built in sun protection.
Or, you can do like the locals and get one of the inflatable shirts with a fan in them. Find them at Makeman – they are definitely an Okinawa thing.
Not glamorous, but it works.
Also, I’d highly recommend if you’re exploring along the shoreline:
- good sunglasses with UV (the glare off the water + sand is enough to give you a headache if you’re sensitive to that sort of thing)
- hat (wide brimmed or base ball, anything to shield your cheeks + nose)
- reef shoes or felt bottoms (stone fish are no joke)
Midday is rough. Plan to be out around mornings and evenings – and relax in the AC during the hottest part of the day and you won’t feel nearly as wiped out.
When Plans Get Disrupted (aka What to do if a Typhoon Comes)
This is the part that people don’t really explain well.
Yes — typhoons can absolutely shift your plans. Fortunately, if you’re paying attention, you’ll usually have a few days’ notice if something’s starts brewing.
But most of the time, you’re looking at a day or two of disruption, not the whole trip being wiped out.
Water activities get hit the hardest – cause no one needs to be in the ocean when things get really crazy. Diving, snorkeling – those can get cancelled – and rightly so for safety.
But most local businesses, malls, and indoor activities usually stay open — so everything else is easier to pivot to a rainy day plan.
If you want my go-to Rainy Day Plan to have in your back pocket — get your copy here →
September: What to Pack
- Swimsuits
- Light, breathable clothes
- UV shirt (you’ll use it)
- Sunglasses
- Hat (wide-brimmed or baseball cap)
- Reef shoes / water shoes
- Sunscreen
- Beach bag
- Portable charger (just in case)
How Visiting Okinawa in September Compares
September vs August
- Same heat, slightly less humid
- Fewer crowds
- Risk of typhoons is about the same
September vs October
- Warmer water, longer days
- Slightly warmer and more humid
- Risk of typhoons higher in September
So, is September worth it?
Go if:
- you’re okay pivoting last minute
- you want warm water + fewer crowds
- you’re OK with a bit of unpredictable adventure
Skip if:
- you need a tight itinerary
- weather uncertainty, or hurricane like storms stress you
- your trip 100% depends on water tours
If you’re still figuring out timing overall, I break down how September fits in with the rest of the year here → Best Time to Visit Okinawa
And if September ends up being your month here – you’ll find that Okinawa is the kind of place that sticks with you long after you return home.
Of course, you can’t forget the sunsets. Add the sunsets spots that have never let me down to your September itinerary →