At the minimum, you need a smartphone with iNaturalist installed and logged into, or a camera to upload your observations to the iNaturalist website later.
Clothing: Wear comfortable layers! It can be cold and windy, and/or sunny at the tidepools, sometimes changing from one to the other. You may also want to have a hat and sunglasses on hand when it is sunny.
Footwear: Be prepared to walk in water up to mid-shin. Waterproof rubber boots are the best choice and will allow you to navigate the tidepools most easily. Other sturdy shoes with good tread that you don’t mind getting wet will also work – an old pair of sneakers is great! Definitely no flip-flops - they are much too slippery!
Some people bring a hiking pole or walking stick to help with navigating the uneven, rocky tidepool area. Also consider bringing water, sunscreen, snacks, and other things to keep yourself comfortable if you think you may need them in the 2-3 hour period we are out. You will want your hands free for holding on to things and keeping your balance, so a backpack or waist-pack may be helpful if you have multiple items.
Because we'll be outside, masks aren't required, but definitely feel free to bring one and wear one if you'd like, especially for times where you might be gathered with others.