What to take to a seaside town
Luggage and bags: Travel lite if possible, suitcases with wheel's on are good, especially if you are coming on train into Bristol to change for Teignmouth. Bristol has lots of platforms, & is a nightmare if you don't know what train to catch next.
Clothing/Shoes/Weather Gear: Pair of your best shorts
coat for the chillier evenings, especially if you are going out on any of the boat trips
Umbrella for both rain and sun
Bum bag to hide valuables
Toiletries and Medical Supplies: Towels are supplied at the Mellons, but bring one in case.
soap (liquid if poss)
Photo Equipment: Keep camera's away from the sand, as grit can completely ruin the mechanism.
Camping/Beach/Outdoor Gear: Towel for the beach
Sun tan oil (20 upwards)
sun shelter, can be brought in gift shops
Miscellaneous: Drink lots of liquids during the hotter weather. You can buy things in Teignmouth.