Wifi is quite common around the main local City of Rethymno. The free local hotspots are :-

Municipal Wifi in Rethymno

Network Name (SSID): municipality_of_rethymno

Location

Wi-Fi Hotspot

- Rethymno Beach are from Ideon Hotel to Kriti Hotel  
- Erofili Theater - Fortezza  
- Mikrasiaton Square

- Home of Culture  
- City Hall Square  
- Platia Heroon Square  
- 4 Martyrs Square

- Municipal Garden