This list will ensure that whichever season and whatever weather; you will be prepared and comfortable: thermal bottom leggings, shorts, pants, swimwear, socks, thin merino shirt/thermal shirt (x2), fleece jumper, woolen jumper, wind and rain-proof jacket, sunhat, warm beanie, scarf, and gloves.
For equipment you will need: sandals, closed-toe footwear, sunglasses, medication (if applicable), a water bottle, toiletries, a waterproof pack liner, and a backpack to put all of the above in.