How to Check the Ocean Temperature on your Phone Before You Hit the Beach

Is there an easy way to check how cold the surf is without putting a giant thermostat in the water? Yes! Here’s how to help avoid a shivery surprise when you take that first step in.

My wife and I decided to take a quick dip at our town beach last week after work. It’s not something we typically do, even though we live just a short drive from the Connecticut shore. We enjoyed our 90-minute vacation so much, we repeated this refreshing early-evening experience over the next two days (and hoped to do it more in the upcoming weeks).

As much as we enjoyed our pre-dinner excursion, we were surprised that the ocean temperature varied from day to day. The water felt warm on day one. The second afternoon’s ocean temperature was colder. And day three’s surf seemed downright icy.

I suspected the differing air temperature and humidity between the days affected our experience, but I didn’t think the ocean could get noticeably colder that quickly.

I decided to fact check my opinion and find a way to confirm the actual water temperature by my beach on those particular days.

NOAA Data Buoys
The National Oceanic and Atmospheric Administration maintains numerous data buoys off the coastline. These NOAA buoys track the weather including ocean conditions.

So, I went to the NOAA’s National Data Buoy Center website and identified the closest ocean data buoy to our beach. I found a nearby buoy in Bridgeport, CT and took a look at its historical data.

And in fact, there was a variance of five degrees in the sea water temperature across those three days. (between 70-75.5° Fahrenheit).

Wind Direction Affects Ocean Temperature
This was a surprise, as I’ve always thought the water by our Connecticut beach remained a steady temperature that simply inched up over the summer. And as such, it was a non-factor on which days were the better beach days.

So, I did a little Googling on this topic and realized that the wind plays a huge role in determining how your beach’s water feels from day to day. 

I discovered that wind blowing towards a beach will keep the ocean warmer. That’s because the surface water that’s been warmed by the sun gets pushed towards the beach. The opposite is true for offshore winds which will suck the top ocean layer away and make your beach’s waves colder.

Wow. 

So, in fact, if you want to go for a swim at the beach and hope for warmer water, some days are actually better for that than others.

I immediately started to think about my iPhone and how nice it would be to easily check out the ocean temperature on my phone before I jump in next time.

Is there an app for that? Well, of course there is…

Mobile Apps that Display NOAA Data Buoy Info
There are a variety of mobile apps that collect and present the data from the NOAA’s data buoys. You just tap in your buoy’s number, and the water temperature pops up along with the weather conditions. (Some apps automatically use your location to find the nearest buoy.) Either way, it’s easy.

Here are the apps that I tested on my iPhone:

  • Buoycast: NOAA Marine Weather
  • Marine Weather Forecast Pro 
  • NOAA Buoy Reports

I’m more partial to the design interface of Buoycast, but they all provide the same data.

All three apps are free, though they offer premium features (such as historical data) for a price. But if you just need to know the real-time water temperature, the free versions are all you need.

Don’t Forget to Check your Data Buoy Before Grabbing your Swimsuit and Towel
I used to think a warm, sunny day is all that determined a good beach day. But if you’re looking to swim, warmer water is always nice. And the right wind conditions can heat it up for you.

With an app on your phone that tracks the nearest NOAA data buoy, you can now quickly check the water temperature before deciding to head out to the beach.

Real-time data means no more chilly surprises!