How Old Is Jeremiah From The Summer I Turned Pretty

Let’s be honest, half the fun of watching The Summer I Turned Pretty is arguing about which brother is better. But before you can pick Team Jeremiah or Team Conrad, you need to know the basics. And the most basic, confusing, and oddly satisfying question is: how old is Jeremiah Fisher?

It’s like trying to remember your cousin’s age at a family reunion. You know they were born around the same time as your niece, but was it the summer of the big barbecue or the one where Aunt Karen cried over the potato salad? Yes, it’s that specific.

The Numbers Game

According to the books by Jenny Han and the show’s timeline, Jeremiah is 17 years old during the first season. He’s a rising high school senior, which means he’s old enough to drive, flirt with disaster, and still eat an entire pizza by himself without any regrets.

Conrad, his older brother, is 18 and about to head off to Brown University. This one-year age gap feels like a canyon when you’re a teenager. It’s the difference between being able to buy a lottery ticket and still asking your mom for gas money.

I remember being 17. You’re practically an adult—until you have to call your dad because you locked your keys in the car. Jeremiah is that exact energy. He’s confident, reckless, and still sleeps with a nightlight because of that one scary movie.

Why Does It Matter?

You might be thinking, “Who cares if he’s 16 or 17? It’s a show about love triangles and beach volleyball.” And you’re right. But age matters because it explains why he acts the way he does. A 17-year-old boy makes decisions based on feelings, not spreadsheets.

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When Jeremiah cracks a joke while Conrad is brooding, it’s not just personality. It’s brain chemistry. At 17, your frontal lobe isn’t fully cooked yet. You’ll dye your hair, confess your love in a rainstorm, and then panic because you forgot to do your homework.

Compare that to being 18, like Conrad. At 18, you think you know everything. You’re sarcastic, you’re tired, and you drink coffee like it’s a personality trait. Being 17 is still having hope. Jeremiah has hope. That’s his whole deal.

A Quick Timeline Breakdown

In season one, set during summer after Belly’s junior year, Jeremiah is 17. In season two, a few months later, he’s still 17. In season three (spoiler alert from the books), he turns 18 during the events. So, he’s basically that friend who’s “almost 18” for an entire year.

You know the type. They hang out with the older kids, but they still can’t get into R-rated movies without a chaperone. It’s awkward for everyone. But it also makes him relatable. We’ve all been the youngest person in the room, trying to act cool while secretly Googling “how to start a campfire.”

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The show’s timeline is also flexible, like a pair of sweatpants after Thanksgiving dinner. In the first book, Jeremiah is 16. But the show aged him up slightly to align with the actors. Gavin Casalegno, who plays Jeremiah, was 23 when season one aired. So, you know, Hollywood math.

What This Means for Your Love Life

If you’re Team Jeremiah, it might be because you remember what it felt like to be 17 and hopelessly in love. You’d plan grand gestures, like writing a song or showing up at someone’s house in the rain. It’s adorable and slightly desperate.

If you’re Team Conrad, you probably identify with the angst of being 18 and thinking you’re too mature for romance. You’ve been burned. You’re cautious. You own a black turtleneck. Both are valid.

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Jeremiah’s age also explains why he’s the “fun” brother. At 17, fun is your currency. You organize pool parties, lie about sneaking out, and eat waffles at midnight without a second thought. Conrad is busy being 18—which is really just “17 but with a frown.”

The Real Takeaway

So, how old is Jeremiah? 17, with a side of chaos. He’s old enough to drive, young enough to believe in true love, and exactly the right age to make you laugh when you’re crying over a boy. He’s the human version of a golden retriever—loyal, goofy, and perpetually a little bit messy.

Next time you watch the show, don’t stress about the numbers. Instead, think about your own 17-year-old self. Were you as brave? As reckless? Did you also think floral button-ups were a good fashion choice? Probably yes.

In the end, Jeremiah’s age is just a plot device. What matters is that he makes you smile, roll your eyes, and maybe, just maybe, wish you could go back to the summer when the biggest problem was what to wear to the bonfire. And that’s the magic of being 17.