If you need to install Golang on WSL under Windows 10 or higher, you can follow these few steps.

First remove any old versions lying around

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sudo rm -rf /usr/local/go* && sudo rm -rf /usr/local/go

Determine the latest Go version

Go to https://golang.org/dl/ and find out what the latest version is. At the time of writing this, Go is on version 1.16.

Install Go

Make sure to replace 1.16 below with the updated version as required.

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VERSION=1.16
OS=linux
ARCH=amd64

cd $HOME
wget https://storage.googleapis.com/golang/go$VERSION.$OS-$ARCH.tar.gz
tar -xvf go$VERSION.$OS-$ARCH.tar.gz
mv go go-$VERSION
sudo mv go-$VERSION /usr/local

Add Go to your environment profile

Open ~/.bashrc and add the following. Remember to update the 1.16 to the version you installed.

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export GOROOT=/usr/local/go-1.16
export GOPATH=$HOME/projects/go
export GOBIN=$GOPATH/bin
export PATH=$PATH:$GOROOT/bin
export PATH=$PATH:$HOME/projects/go/bin

You will now be able to run Go by typing go in the WSL terminal.