Can Guppies Live In Cold Water? (7 Interesting Facts)

Guppies are cold-blooded organisms, have to live underwater near their body temperature.

Can guppies live in cold water? You can set the aquarium water temperature for guppies so they will live in water that’s moderately hot and perfect for their normal activities. Low temperatures cause many diseases in guppies and cause your pet guppy’s death.

This article will discuss can guppies live in cold water. We will also discuss the guppy temp range and the ideal water temperature for guppies. Let’s start the article now.

Can guppies live in cold water
Can guppies live in cold water?


Can Guppies Live In Cold Water?

Guppies are small pet fish that needs a specific “guppy water temp” to properly carry out all the basic needs of their daily life. So the question: can guppies live in cold water? It’s very important here.

You have to be very careful in guppy fish temperature Celsius measurement, as low temperatures will almost kill your guppy.


Water Temperature for Guppies

While you are addressing your guppy in a tank, this question must arise in your head: how cold is too cold for guppies?

There are certain temperatures at which the guppy will be living perfectly, while the very low temperatures will cause the guppy to die in the worst case.


Guppy Temperature: The Body Temperature

What is the guppy fish water temp? You know there must be a body temperature of guppy fish. What is that?

The internal body temperature of guppy fish is about 85 Fahrenheit. You have to adjust the tank water temperature to 75-82 F, which keeps the fish very healthy and active.


How Long Can Guppies Live In Cold Water?

Guppies care temperatures vary, and the ability to remain in the cold water will also decrease tremendously.

For how long you can think that these guppies live in cold water? Researchers say that living in cold water will depend on the temperature of the water.

If the water temperature is freezing, this will impact the fish life, and merely it lives for 1 hour below the 15 degrees Celsius temperature.

But in moderate water temperature, like 16-18 degrees, the fish can live up to 3-4 hours before passing out.


Can Guppies Live In Cold Water With Goldfish?

Do guppies survive in cold water? That’s the biggest question we all want to know. If you are going out for vacation and looking to get your guppies with you, there must be a heater with you.

Because the cold areas will not have a favorable temperature for guppy fish, you need to provide heat by direct sunlight or use any heater. You can also use a lamp to provide some heat to the guppies. Goldfish and guppies need almost similar conditions to live peacefully.


Can Fancy Guppies Live In Cold Water?

Can I keep guppies in cold water? Fancy guppies are the most vulnerable fish that we must take care of and keep in a heated environment.

Fancy guppies have a narrow range of temperature that they live in, and it’s between 8-15 degrees Celsius. So you can’t keep a guppy fish in cold water.


How Cold Of Water Can Guppies Live In?

You always maintain a minimum temperature of the water tank in your guppy room, so it will help your guppy live a longer life.

We had a guppy fish, and we saw that we always set guppy’s temperature tank to 22-28 degrees Celsius.

The fish start moving very fast when the temperature decreases below 14-10 degrees. It was meant to be the point that we should not decrease water temperature below 10 degrees.


Side Effects of Keeping a Fish in Cold Water

Guppies are very good pets that can adapt to almost all temperatures beyond a certain limit. But this does not give you the right to abandon them in cold temperatures.

Risks and associated side effects of keeping a fish in cold water are as follows:


Less Activity

When we place guppies in the water below the ideal temperature of guppy bodies, you will notice that their activity is reduced. This way, your guppy will not be actively moving inside the tank, and you need to increase the temperature to make life normal.



Many lethal diseases occur when you leave the fish guppies in cold weather and water. If you don’t replace it with hot water, certain cold-water diseases of guppies will kill the guppies.


Breeding Issues

Breeding guppy fish are the most important animals in wild aquatic nature. These fish only reproduce properly in warm weather. So, if you provide them with a cold atmosphere, this means you’re affecting their progeny.


Slow Growth Rate

Warm water is also very crucial for the growth rate of guppy fish. Coldwater hits fish growth very hard and will reduce the conversion of carbohydrates into glucose. It will not let the fish grow in a normal manner.



Stress is the biggest issue in aquatic life killing. The cold water affects the immunity of guppies. It directly affects the stress level, which may kill the fish.


Can You Have Guppies Without A Heater?

Without a heater, guppies don’t survive for long. It will be the worst in killing your fish, making you sad and cold.

Therefore, many people will use a heater for this purpose. Many risks are associated with heater-less guppy tanks, such as:

  • Temperature irregularities 
  • Immunity problems
  • Diseases and Cold body
  • Nutritional deficiencies of fish
  • Guppies won’t eat due to cold water
  • No proper fertilization

All these things will be occurring to your fish when you don’t take care of the heater. But anyhow, if you can’t afford a heater, there’s one thing you can do.

We have come life-hacks from our old granny’s list that will make your guppy live longer and healthier even without a heater. These are as follows:


Provide Sufficient Lighting

The first and foremost thing is always keeping the loom enlightened in which your fish is present. A lamp placed beside the fish aquarium will also help convert light energy into heat energy.


Ensure Direct Sunlight Rays

Sun is the best way to provide heat to your fish. But you can’t bring the sun out at night. So during the daytime, take your tank fish guppy out of your room, and place it near the direct sun rays.

It’s a great way to keep the fish active and healthy. But beware of cats and dogs (stray animals) in your backyard.


Keep the Aquarium in the Kitchen or Near the Fireplace

There are two favorite places for everyone to sit during the cold seasons. Two places that keep everyone warm and cosy.

You can either use the chimney room where you light some fire or use the kitchen where the stove fire increases the room temperature.

These rooms are the best for guppy fish to live without dying, lol!


Retain the Heat Inside the Aquarium

Covering the fish tank with a warm cloth or paper is best to ensure heat is trapped inside and increase the aquarium temperature. You can use anything like insulating paper for this thing.

Can guppies live in cold water
Can guppies live in cold water? Can guppies live in cold water as pets? Can guppies live in cold water in captivity?


Guppies in a Pond Outdoor

There are some regions where we can place guppies in an outdoor pond. But we have to be very specific in choosing those areas, as many predators will try and kill our beloved pets.

Only place your guppies outside if you’re sure that the temperature will not decrease below 69 degrees Fahrenheit.


Do Guppies Like Cold Water?

There are different temp for guppies that they like and sometimes don’t like. But certain temperatures where the water is too cold will not be favorable for the guppy life.

They will be on the verge of dying, and you can still save them by using heaters or sunlight. That would mean Guppies don’t like cold water.


What Temperature Do Guppies Need?

The guppy temperature range is the thing we can be sure to let the guppy cold water fish healthy and active.

Active temperatures best for guppies are between 15-28 degrees Celsius. Maintaining this temperature will be in their best interest if you can maintain this temperature.


Guppy Fish Temperature Tank

The guppy tank temperature is the most important thing to notice. As if you can use the heater in your fish water tank, then you’re saving your fish guppy.


Tropical Fish Tank Temperature for Guppies

The guppy aquarium temperature lies close to the fish’s internal temperature. we must maintain the tank at 22-29 degrees Celsius.

This means your guppy will be burning enough calories to save itself from anything in the slightly cold water.


Ideal Temp for Guppies

The ideal temperature for guppies is still the same as we‘ve discussed before and is 23 degrees Celsius. You can set the guppy tank heater on this temperature manually by yourself.


Water Temperature for Guppies and Mollies

Water temperature for guppies and molies is important to set the heat of their body. Make sure you’re making the temperature in relevant ranges. It makes it very good for your fish pets.


What Is the Best Temperature for Guppies?

What water temperature for guppies is best and some fancy guppy water parameters? These are the parameters:

  • Water temperature: 72-82 °F (22-28 °C )
  • Water pH: 6.8-7.8.
  • Water hardness (dGH): 8-12.
  • 0 ppm ammonia, 0 ppm nitrites, maximum 10 ppm nitrates


Is Heater For Guppies In Cold Water Necessary?

Yes, the heater is one of the most crucial things for aquatic fish, including guppies domesticated by many pet owners. You can either use the heater or buy a tank with a heater that will automatically do all these things.


Reason to Use Heater For Guppies

Many things will compel us to use guppy heaters:

  • Guppy heaters are necessary for immunity 
  • They will provide heat and keep guppies healthy and active
  • A Guppy heater is very important for avoiding nutritional deficiencies
  • These heaters will keep the fish progeny and fertilization inflow without congenital diseases


Frequently Asked Questions (FAQs)

Can Guppies Survive Without A Heater?

Can guppies live in cold water without using any heater? Is it a thing we all want to know? Your fish may survive without a heater, but only if you use a sunlight source, keep the tank heater using a kitchen fire, or any heat source such as a lamp.


Can Guppies Survive The Winter In A Pond?

Guppies can live in cold water if they live in an area with very moderate cold water temperatures. Usually, temperatures more than 68 degrees Fahrenheit are the most suitable, also regarded as tropical areas.


Can Guppies Live In An Outside Pond?

How can guppies live in cold water pond? You can only make sure about the pond temperature by depicting the outside weather. See if the temperature lies between 20-28 degrees Celsius. If this is true, you can keep your guppies live in an outside pool.


Will Guppies Die In Cold Water?

Yes, temperature for guppies Celsius range is very important. If you keep the guppies in cold water with less than 10 degrees Celsius, it will kill your guppy.

So, if you don’t want to kill your puppy, please don’t keep them in a pond, aquarium, or an area where the temperature is too low.

Can guppies live in cold water
Can guppies live in cold water? Can guppies live in cold water in the wild? Can guppies live in cold water in the pond?


Final Verdict – Can Guppies Live In Cold Water

Guppies are regarded as tropical pet fish. We all want to know: can guppies live in cold water? The shortest and to the point answer is as follows:

You can keep them in cold water as long as the temperature remains up to 10 degrees as lowest and 35 degrees as highest. Anything below and higher than this temperature will be lethal for guppy fish.

As a pet lover, make sure to learn about pet more and give your pet fish a good and comfortable life!

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