If during the day you want just a coffee or a meal there are many local eateries to try.
Eateries based in the village are: Arisaig Hotel with the Crofters Bar attached to it for pub meals. There is also The Old Library Lodge and Restaurant. All the eateries offer good views across to the loch whilst you are enjoying coffee/tea and cake or a meal. Arisaig Marine has a tea/coffee shop with gifts if you are wishing to look out over the harbour. All the eateries have websites.
There are also a number of restaurants in Mallaig.
Fort William also offers a good selection of restaurants.