Yes, you can absolutely use your debit card in Grand Cayman in 2026. Most major establishments, including hotels, grocery stores like Foster’s, and restaurants, accept Visa and Mastercard debit cards. However, you should be aware of a few 2026 logistical details: many local vendors charge in Cayman Islands Dollars (KYD), and your bank may apply a foreign transaction fee for the conversion. Additionally, while "tap-to-pay" is widespread in George Town, some smaller vendors on the East End or North Side may still prefer cash (USD is widely accepted alongside KYD). It is highly recommended to notify your bank of your travel plans via their app before arriving to prevent your card from being flagged for suspicious activity. Always carry a small amount of cash for "stingray city" tours or small beach shacks where connectivity might be spotty.