We've been in Feb three times. First watch the long range forecast and don't pack too soon. If it looks like it's going to be cooler when you go you can cut back on shorts and sandals, if it's going to be warmer, cut back on pants. That being said on this trip I will not overpack (LOL! and FAT CHANCE!) but here's my list for 7 day trip - Will do laundry if necessary.
4 shorts
4-5 short sleeve tops
2 bathing suits
3 pants
1 set of sweats
1 set of long underwear
2-3 long sleeve tops
1 sweatshirt
daily socks and underwear
2 beach towels
nightshirt
sneakers (if I can fit, I will do two pairs)
sandals
flip flops
Poncho
will wear one pair pants with long sleeve shirt with fleece jacket
Assuming 60-80 degree weather I should not have to do laundry. If it's predicted to be cooler, I would probably add another set of dressier fleece sweats (worn with the long underwear and the fleece jacket I'd be comfortable to about 50 degrees. )