What Temperature Do Guppies Need? Ideal Temperature Guide

Guppies are tropical freshwater fish which means that they dwell in wild water conditions. However, they can adapt themselves to tolerate other temperature ranges.

But one must know the ideal water temperature range best for their survival. The suitable water temperature for guppies is between 72 to 81 degrees Fahrenheit.

Guppies can also exist in lower water temperatures (around 65 degrees Fahrenheit) for a day or two, increasing the chances of various ailments and infections. If you want to keep your guppies happy and healthy, you must keep them at the ideal water temperatures.

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What Temperature Do Guppies Need?  

Do you worry too much about the best water temperature for guppies, what temperature do guppies need to live in, or the ideal water temperature for guppies? Then, let us put an end to your worry with this post.

Guppies are tropical fish, and they need an ideal water temperature for their survival. The optimum water temperature ranges between 71 to 82 degrees Fahrenheit, which is ideal for almost all fish tanks.

Hence guppies can easily coexist with other fish species, and they can endure temperatures of up to 65 degrees when the temperature drops.

The maximum temperature they can endure in the water is around 90 degrees Fahrenheit, and however, they can not do well at this temperature for a very long time.

Scorching temperatures usually increase the metabolism of guppies, making them more hyperactive. This can often lead to stress, weaken their immunity, and even cause death.

Guppies are more likely to get infected by parasites and ailments when the water temperature is not ideal. Hence it is essential to check the thermometer to ensure the water temperature remains ideal. Scorching temperatures are known to reduce oxygen levels in the tank, leading to suffocation in your guppies.

Also, with increased temperatures, the beneficial bacteria present in the tank would not get enough oxygen to break down nitrates and ammonia. A rise in ammonia levels poses a severe threat to the guppy’s survival.

Similarly, keeping your guppies in freezing tanks can give rise to many problems, such as making them lethargic and lowering the chances of breeding.

This also exposes them to various ailments, which can also be life-threatening. Getting a heater for your tank is the best way to keep the water temperature optimum for the guppies.

What Temperature Do Guppies Need To Breed?

what temperature do guppies need to breed
what temperature do guppies need to breed

Guppies need an ideal water temperature to breed (from 71 to 82 degrees Fahrenheit). When the water temperature begins to drop below 65 degrees, guppies become susceptible to various ailments, such as ich and other infections.

Lower temperatures also stop the activity in guppies and make them more passive, which leads to a pause in their breeding process.

Also, scorching temperatures can cause breathing problems and many other disorders in guppies. Hence, it is essential to watch the tank’s water temperature using a thermometer and maintain an ideal water temperature using a heater.

What Temperature Does Guppy Fry Need?

Guppy fry thrives best in water temperatures ranging from 71 to 82 degrees Fahrenheit. If the temperature gets too hot for them, they may die due to suffocation and catch various diseases. Similarly, a too cold temperature for them will make them inactive, which is not a good thing for their health.

It would help if you used a thermometer to monitor and maintain the ideal temperature of the fish tank. Guppy fry needs more care for their growth than adult guppies, and keeping them in ideal water temperatures is an essential step one should never overlook.

What Temperature Is Too Hot For Guppies?

Guppies can endure a maximum water temperature of up to 84 degrees Fahrenheit. Eighty-five degrees would also be okay for a short period, though it is not safe for a long time.

However, anything above 85 degrees would be complicated for guppies to tolerate and lead to various ailments and infections.

Does Water Temperature Affect Guppy Gender?

The water temperature may affect the guppy’s gender to some extent. Guppies are livebearers and are born females. All guppy fry look similar when they are born, and it is when they begin to grow, you may notice subtle differences in their appearance. It may take around a year and a half for them to get converted into males.

A fry may also keep its gender hidden in front of dominant males. Several reports have shown that guppies produce more of one gender in higher temperatures and more of the other gender in lower temperatures. However, this is not a fully-proven fact.

Are 90 Degrees Too Hot For Tropical Fish?

are 90 degrees too hot for tropical fish
are 90 degrees too hot for tropical fish

Most tropical fish prefer to live in 71 to 82 degrees Fahrenheit water temperatures. Once the temperature goes above 90 degrees, it becomes tough to survive. Higher temperatures like these lower the oxygen levels to a large extent and can cause suffocation and death in tropical fish.

Can Guppies Live In 80-Degree Water?

Yes, guppies can survive in 80-degree water. The ideal temperature for their survival is between 71 and 82 degrees Fahrenheit. When the water temperature does not exceed this range, there is no threat to their survival, and they can live happily in the fish tank without any severe problems or ailments.

Can Guppies Live In 72 Degrees?

Yes, guppies can easily survive in a water temperature of 72 degrees Fahrenheit. As 72 degrees stay within the ideal water temperature range for these tropical fish, they will not survive. This also avoids health conditions such as infections, suffocation, and other fatal fish diseases.


Guppies are tropical freshwater fish, and they need an ideal water temperature for their existence. If the water temperature stays within the optimum range of 71 to 82 degrees Fahrenheit, they will live a healthy and happy life. This temperature range is ideal for most fish tanks; they can coexist with other fish.

Scorching temperatures can increase their metabolism and make them more stressed. Higher temperatures also lower the oxygen levels and lead to various ailments. On the other hand, extreme cold temperatures can lead to inactivity in guppies, stop breeding, and lead to various diseases and even death.

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