---
title: "How long does a harbor seal last?"
description: "A harbor seal lasts 20–35 yr. How that compares to other things, and where the number comes from."
url: https://atoneplace.net/how-long/harbor-seal/
site: "At One Place"
---

# How long does a harbor seal last?

**Typical lifespan: 20–35 yr**

The most widespread true seal of northern coasts, which must belly-crawl on land.

## How that compares

*Harbor seal against things of a similar time.*

- Harbor seal: 20–35 yr
- Polar bear: 20–32 yr
- Giraffe: 20–28 yr
- Grizzly bear: 20–35 yr
- Bathtub: 15–50 yr
- Elevator: 20–40 yr
- Tractor: 15–50 yr
- Window: 15–40 yr

## What that means over time

*Assuming the typical lifespan above and immediate replacement.*

| Period | How many you would buy |
| --- | --- |
| Per year | 0.04 replacements |
| Over 10 years | 1 of them |
| Over a 30-year mortgage | 1.2 of them |

> Lifespans are medians under ordinary use, not guarantees. Maintenance, how hard it is used, and build quality move individual examples a long way in both directions — which is why the range above is as wide as it is.

## More about a harbor seal

- [How much does a harbor seal weigh?](https://atoneplace.net/weight/harbor-seal/) — 45–170 kg

## Common questions

### How long does a harbor seal last?

A harbor seal lasts 20–35 yr.

## Related pages

- [How much does a harbor seal weigh?](https://atoneplace.net/weight/harbor-seal/)
- [How long does a lion last?](https://atoneplace.net/how-long/lion/)
- [How long does a tiger last?](https://atoneplace.net/how-long/tiger/)
- [How long does a domestic cat last?](https://atoneplace.net/how-long/domestic-cat/)
- [How long does a African elephant last?](https://atoneplace.net/how-long/african-elephant/)
- [How long does a blue whale last?](https://atoneplace.net/how-long/blue-whale/)
- [How long does a great white shark last?](https://atoneplace.net/how-long/great-white-shark/)
- [How long does a cheetah last?](https://atoneplace.net/how-long/cheetah/)
- [How long does a polar bear last?](https://atoneplace.net/how-long/polar-bear/)
- [How long does a giraffe last?](https://atoneplace.net/how-long/giraffe/)
- [How long does a gorilla last?](https://atoneplace.net/how-long/gorilla/)

## Sources

- National Oceanic and Atmospheric Administration — NOAA (https://www.noaa.gov/) [Public domain (US Government)]