Husbandry & Evidence Review – 6 September 2026
Heatwave advice is retained as practical experience, but fixed temperature/RH thresholds and ‘100% safe’ lighting claims have been removed.
As UK summers become more unpredictable, many frogkeepers are left wondering how to keep dart frogs cool when it’s hot outside. Amphibians like dart frogs are incredibly sensitive to temperature, and even a few degrees too warm can lead to stress, dehydration, or worse.
here are 10 practical measures that can reduce heat load; their effect depends on the room and enclosure.
☀️ Top 10 Tips to Keep Dart Frogs Cool in Summer
- Close Windows and Doors
– It might sound counterintuitive, but opening windows on a hot day can let in warm air and raise the room temperature. Keep windows and doors shut in the hottest part of the day. - Draw Curtains and Close Blinds
– Sunlight streaming through glass quickly heats up rooms and vivariums. Use blackout curtains if possible to block radiant heat. - During an acute heat problem, reducing or temporarily switching off heat-contributing lights can be reasonable. ‘100% safe’ is too absolute; consider species, plant needs, UVB strategy and the duration of the change.
- Add a Desktop Fan or Air Circulator
– Position a small fan near (but not blowing directly into) the vivarium to keep ambient air moving. Avoid cold air blowing straight into tanks, as it can dry them out. - Reduce Mistings During the Day
– Mist in the early morning and late evening only. Mistings add humidity, but they also raise ambient temperature slightly if done when it’s hot. - Use Frozen Water Bottles or Gel Packs
– Wrap a frozen bottle in a cloth and place it on or near the outside of your vivarium. As it defrosts, it will absorb heat and gently cool the enclosure. - Move Tanks to the Coolest Room
– If possible, shift your vivariums to a shaded, north-facing room, basement, or utility area during a heatwave. - increase ventilation carefully while maintaining moist refuges; do not chase a universal >70% RH threshold.
- Use a Temperature Monitoring System
– Smart thermometers or Wi-Fi hygrometers let you check temps remotely and send alerts if your vivarium is overheating. - Avoid Feeding During the Hottest Times
– Frogs eat less in extreme heat. Overfeeding during this time can lead to uneaten food rotting or attracting mites.
🚫 Don’t Panic – Frogs Can Handle Short Spikes
Heat tolerance varies among species, individuals, hydration states and enclosures. Frogfather does not use 26–28°C / 29°C as universal safe/danger cut-offs; intervene early when temperatures move well outside the normal species-specific range.
If your vivarium consistently exceeds 27°C for hours at a time, consider investing in an active cooling solution, like a Peltier chiller or aquarium fan system.
