If you Google how to get to Tempest Bay as a low-level character, you'll see stuff about guild summon banners and what not. However, let's say you don't want to join a guild, or spam chat asking for a summon, and none of your friends play Rift. Well, good news. Getting your crafting alt to Tempest Bay is a whole lot easier than you might think.

Step 1: Join Instant Adventure. Specifically, in one of the Storm Legion areas. If you don't end up there, try again later.
Step 2: Exit the Instant Adventure, but don't teleport back.
Step 3: As a low-level character, pick a fight with an enemy. Lose. Badly.
Step 4: Choose "Respawn". You are now in Tempest Bay.
Step 5: Talk to the NPC and choose to resurrect.

It's that easy.

(Presumably, this is because the developers didn't want to trap your low level character in a Storm Legion area, surrounded by enemies they have no hope in defeating.)