gping is a nice tool that will visualize network latencies directly in the terminal.
Example:
$ gping 10.0.0.252
Looks like this on my network:
10.0.0.252 (10.0.0.252) last 3.5min 1.08 max 8.66 avg 1.97jtr 50µs p95 4.55 t/o 0
8.304ms│ ⢀
│ ⢸ ⢀
7.082ms│ ⢸ ⢸
5.86ms │ ⢸⡆ ⢰ ⡄ ⣼
│ ⢸⡇ ⢸ ⡇ ⣿
4.638ms│ ⡇⡇ ⢸ ⡆ ⣿ ⡏⡆⢠
3.416ms│ ⡇⡇ ⡞⡄ ⣷ ⢸⢸ ⢀⡇ ⢰ ⢠⠃⡇⢸⡆
│ ⡆ ⡇⢣ ⡇⡇⢰⠹⡀⣇⢸⠸⡀ ⡸⢇ ⢀⢿ ⢸ ⡇⡎
2.194ms│⢆ ⡀⡀ ⣦⢇⢀ ⢠⠣⢲⢰⣀⠎⢆⠴⡜⢆⡀⢀⣠ ⣀ ⡠⢆⢶⢸⢱⢠⡇⢸ ⢠⡀⡀⡀⢀⡇⡇⢸ ⢷⠹⡸ ⣧⣀ ⢀ ⡀⡀⢠ ⢀⢀⢆ ⡇⢸⢠⠎ ⡇ ⢰⢆⡜ ⡇⡇
972µs │⠈⠑⠉⠑⠚ ⠘⠎⠉⠊⠑⠢⠊ ⠃⠉ ⠈⠑⠊ ⠓⠉⠞ ⠈ ⠃⠈⠁ ⠘⠉⠒⠃⠈⠑⠉⠁ ⠓⠉ ⠈ ⠁⠈⠊⠒⠊⠉⠑⠉⠁⠉⠊⠊⠈⠙ ⠈⠁ ⠋⠙⠇ ⠁ ⠘
└───────────────────────────────────────────────────────────────────────────────
08:09:43 08:09:58 08:10:13