Scheduled ferries to and from Iran are handled by Kuwait-Iran Shipping Company, phone +965 2410498, fax +965 2429508. The ferries go three times a week from Ash Shuwayk in Kuwait to Bushehr in Iran. One-way tickets from KD37.
Speedboats also go between Ash Shuwayk and Manama in Bahrain. A ticket is KD45.
Ports and harbors:
Mina' 'Abd Allah
Mina' al Ahmadi
Kuwait shares its borders with only 2 nations - Iraq and Saudi Arabia. Thepolitical situation in Iraq is volatile currently, so it's advisable not touse that route. There are long-distance bus services to Dammam and other points in Saudi, but you will of course need to have a valid Saudi visa.