❄️ Can My Fish Survive Outdoors?

Enter your climate zone and fish type to find out if they can safely overwinter in an outdoor pond

Your Climate & Fish

Not sure your zone? Look it up with your ZIP or postal code

Outside the US? Include your country for a more accurate result — e.g. "SW1A 1AA, UK" or "K1A 0B1, Canada".

This is an AI estimate — double check the zone selected below matches what you expect before relying on it.

USDA Hardiness Zone

Fish Type

Pond Depth (feet)

💡 Why depth matters so much: Water below about 39°F is at its densest and sinks to the bottom, which is why a deep enough pond keeps a stable warmer layer at the bottom even when the surface freezes over. Shallow ponds don't have that buffer, which is why depth — not just your zone — decides whether cold-hardy fish like koi and goldfish make it through winter outdoors.