Compare eSIM plans for the Cayman Islands

Most visitors to Cayman spend a serious proportion of their trip on a boat, and that is the one thing a coverage map will not tell you. On land the islands are excellent: Flow and Digicel both run modern networks, Grand Cayman has fibre and 5G in the urban areas, and 4G reaches the quiet ends of the island (sources: Internet Society Pulse, ITU DataHub). A few miles offshore, over the drop-offs where the diving actually happens, there is nothing. Plan the day on shore and the water takes care of itself.

• ●The dive sites are the obvious case. Bloody Bay Wall off Little Cayman and the sheer face below the Bluff on Cayman Brac are out of reach of anything useful, and even the closer stops, the USS Kittiwake wreck off Seven Mile Beach and the sandbar at Stingray City in the North Sound, are better treated as offline. Confirm the boat, the pickup and the weather before you leave the dock.
• ●Ashore, the band from George Town up through Seven Mile Beach to West Bay and the oddity of Hell is as connected as anywhere in the region, and the road east past Rum Point and Starfish Point to the East End blowholes holds up well.
• ●Cruise days are the local quirk worth knowing. When several ships tender into George Town at once, the cells around the waterfront visibly slow, which matters if you are trying to book a taxi or check a tour at exactly the same moment as a few thousand other people. Shifting anything time-critical by an hour solves it.

Sources: Internet Society Pulse: Cayman Islands, ITU DataHub: Cayman Islands, Ookla Speedtest Global Index, Visit Cayman Islands