I'm on a med cruise right now.
We've had some very big downpours which we've missed by Hours.
La Palma got really wet

Rome huge showers.
Ship got struck by lightning twice which was awesome.
Its a Marella cruise (TUI) so it's tiny, old and very British.
What ship are you going on?
Don't forget sunglasses and an umbrella.
Decent plug extension lead is a solid tip. Depending on your cabin you have really limited power outlet positioning.
I dunno how old you are but the average clients on ship this are "older"
40mph wind here now balcony open it's like a hurricane coming in lol I love it
Don't bring plastic ducks on this cruise line they actively state it's just landfill junk in the ocean lol. Killjoys.
For afters today I had chocolate mousse and saw some nice ham on the way back so that too.
I feel like a Marella pro now so if you're with them ask away