Countries in Central America are socially conservative and thus naturism/nudism is basically not accepted. However, a few clothing optional/naturist resorts are found in Costa Rica and Honduras.
Copacabana Hotel & Suites (Jaco; clothing optional resort; $$-$$$; all inclusive)
La Catalina Hotel & Suites (Heredia; resort: clothing optional at pool; $-$$)
Club Mi Amor Hotel (Guapiles; clothing optional hotel; $)
Hotel Desire Costa Rica (San José; clothing optional resort; $$$$; all inclusive)
Paya Bay Resort (Roatan; resort: clothing optional at designated areas; $$$-$$$$)
Villa Roca (Manuel Antonio; clothing optional hotel: gay, LGBT; $$-$$$$)