mahi fishin's probably still pretty good thru april or so...'ahi fishin' starts to pick up in april/may but po'o nui or bigeye tuna can be good in march, they're around in winter months in good numbers...a'u/marlin's a little slow then...best in summer...got 'ono around in march....
or you can chase oi'o/bonefish or ulua from boat or better from shore....all depends how much kala/$ you like spend.and what kinda fishin you like....i go back big island next month...looking forward to opening of mullet season and chasing some bones.....