Apple Watch Ultra Can Check the Water Temperature As You Dive and Swim

The new Apple Watch Ultra features the ability to measure the temperature of the water as you're diving, swimming, and doing a range of other water sports thanks to new functionality, added durability, and a new Depth app pre-installed on the watch.

apple watch ultra underwater
The Apple Watch Ultra is the most rugged Apple Watch yet, with features and design elements explicitly designed for swimmers, divers, and athletes. The new Apple Watch Ultra is also the most water-friendly Apple Watch, featuring EN 13319 certification, the international standard for diving accessories such as depth gauges relied on by professional divers.

When diving, specifically, divers can use a new Depth app that shows several key metrics, including current depth, elapsed time, the current water temperature, the amount of time spent underwater, and more. When underwater, the Apple Watch Ultra automatically opens the Depth app, making it quick and easy to get critical information without needing to open it manually.

The Apple Watch Ultra costs $799 and was made available for pre-order after yesterday's "Far out" event. The Apple Watch Ultra will begin shipping to customers on Friday, September 23.

Related Roundup: Apple Watch Ultra 3
Related Forum: Apple Watch

Popular Stories

Home Hub Command Center with Dome Base Feature

Apple Working on All-New Operating System

Thursday September 25, 2025 1:11 pm PDT by
Apple is developing an all-new operating system codenamed "Charismatic," according to Bloomberg's Mark Gurman. Apple smart home hub concept based on rumors This is likely Apple's long-rumored "homeOS" operating system. In a report last month, Gurman said both Apple's rumored smart home hub in 2026 and tabletop robot in 2027 will run the new operating system. He said the software platform ...
iOS 26 Battery Glass Feature

iPhone 16 Pro Max 80% Charge Limit: One Year Later, Was It Worth It?

Wednesday September 24, 2025 3:58 pm PDT by
With the iPhone 15 series, I did an experiment and kept my iPhone's Charge Limit set at 80 percent for an entire year. It provided an interesting look at the impact of charge limits on battery longevity, so I decided to repeat it for the iPhone 16 line. Since September 2024, my iPhone 16 Pro Max has been limited to an 80 percent charge, with no cheating. As of today, my battery's maximum...
AirPods Pro 3 Newsroom

Apple's 'Back to School' Offer Ends Soon, Now Applies to AirPods Pro 3

Wednesday September 24, 2025 7:20 am PDT by
Apple's annual "Back to School" promotion for students ends soon, so act fast if you want to score free AirPods with the purchase of an eligible new Mac or iPad. Until Tuesday, September 30, college students and qualifying educational staff in the U.S. can receive free AirPods 4 with Active Noise Cancellation when they purchase an eligible new Mac or iPad from Apple. This is a $179 value. ...
iOS 26

Apple Continues to Prepare iOS 26.0.1 With Multiple Bug Fixes Expected

Sunday September 28, 2025 1:30 pm PDT by
Apple is preparing to release iOS 26.0.1, according to a private account on X with a proven track record of sharing information about future iOS versions. The account initially said iOS 26.0.1 would have a build number of 23A350, but they now expect the update to have a build number of 23A355. This suggests that the software update will include more bug fixes or changes than initially...
iPhone 17 Pro Colors

Skipped the iPhone 17 Pro? Here's What is Rumored for iPhone 18 Pro

Tuesday September 23, 2025 8:55 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are still a year away, there are already a few rumors about the devices that offer an early look ahead. Below, we have recapped some of the early iPhone 18 Pro rumors so far. This story was published previously, and it has been updated to reflect the latest rumors. Many early rumors prove to be true, but nothing is confirmed yet, and Apple's...
Apple MacBook Pro M4 hero

New MacBook Pro Nears Mass Production, But Four Bigger Upgrades Expected Next Year

Sunday September 28, 2025 2:08 pm PDT by
Apple's next MacBook Pro models will enter mass production soon, according to the latest information shared by Bloomberg's Mark Gurman. In his Power On newsletter today, Gurman said he continues to believe the new MacBook Pro models will be released at some point between late 2025 and the first quarter of 2026, meaning they should be available to order by March at the latest. Apple often...
Apple More Personal Siri Ad

Apple Responds to U.S. Class Action Lawsuit Over Delayed Siri Features

Friday September 26, 2025 6:57 am PDT by
In March, Apple delayed the launch of its personalized Siri features, and soon after the company was hit with multiple class action lawsuits over the situation. The plaintiffs said they never would have purchased an iPhone 16, or would have paid less, had they known Apple's marketing about the Siri features was false. In the U.S., all of the complaints were consolidated into one class...
iphone 17 ceramic shield

Regular iPhone 17's USB-C Charging Speeds Tested With Apple Chargers

Friday September 26, 2025 9:01 am PDT by
The website ChargerLAB has tested the standard iPhone 17 model's USB-C charging speeds with a variety of Apple's chargers, from 18W to 140W. The device reached a peak charging speed of around 27W to 28W with these Apple chargers:29W USB-C Power Adapter 30W USB-C Power Adapter 35W Dual USB-C Port Power Adapter 35W Dual USB-C Port Compact Power Adapter 40W Dynamic Power Adapter with 60W Max...
maxresdefault

Review: A Week With the iPhone 17 Pro

Friday September 26, 2025 12:51 pm PDT by
Apple's iPhone 17 models have been out for a week now, so we thought we'd do a longer-term review of the flagship iPhone 17 Pro and Pro Max now that we've been able to spend more time with them. Subscribe to the MacRumors YouTube channel for more videos. MacRumors videographer Dan Barbera has a Silver iPhone 17 Pro and a Cosmic Orange iPhone 17 Pro Max, and despite a lot of concern over...

Top Rated Comments

ProfessionalFan Avatar
40 months ago

But its only cellular not non cellular
You don't have to activate the cellular on it so what's the issue?

I notice you're posting this in every Ultra thread. And then multiple people are telling you what I just said. And you just post it again in the next thread. I hope you see this reply because maybe your notifications aren't working properly.
Score: 18 Votes (Like | Disagree)
BootsWalking Avatar
40 months ago
When underwater, the Apple Watch Ultra automatically opens the Depth app

When underwater with the non-Ultra Apple Watch it assumes you can't swim and automatically opens the Death app.
Score: 17 Votes (Like | Disagree)
azentropy Avatar
40 months ago
Neat feature. I'm more impressed by the Ultra features than I thought I would be, and I actually think it is priced well considering it replaced the titanium versions. However it is too gaudy for me.
Score: 9 Votes (Like | Disagree)
Motawa Avatar
40 months ago

But its only cellular not non cellular
and?
Score: 8 Votes (Like | Disagree)
ProfessionalFan Avatar
40 months ago

Why would anyone buy the Watch 8 steel case 45mm when you can get a 49mm Ultra for just $50 more?
Because they find the Ultra too big/bulky for them?
Score: 5 Votes (Like | Disagree)
Honumaui Avatar
40 months ago
I have around 15k dives under my belt and taught full time for 15 years

Its very cool and will sell
but nothing my Citizen watches did not do 20+ yrs ago (for basic info) or Suunto dive devices did as full blown computers but they were/are more specific use items BUT those did nothing for other things like working out or biking or hiking or daily life setting a timer etc... :) this is where the watch is so cool its just a daily piece !

I can see the integration of it being very cool they will bring it more to mainstream SINCE you do not have to buy a dive specific device which are $$$

also IMHO for safety its now a backup you have and when I did tech diving you want backups and redundancy !


just like the Sat emergency communication on the new iphone are going to take a HUGE chunk out of the garmin in reach or other devices sales I think !

I can see it taking a cut out of some of the dedicated dive devices

bottom line yeah this is super cool and so wish I had one at the height of my dive career ! Not that it would be a game changer just that daily life integration they offer and redundancy for even a pro to take advantage of etc.
Score: 5 Votes (Like | Disagree)