New trains, which have been specially designed for Dawlish, are currently being trialled at night.
The current ones, which are 40 years old, break down after the waves crash over them and flood the electrics.
The new Class 802 fleet is set to be introduced next year.
Great Western Railway's Intercity Express Trains for Devon and Cornwall are currently undergoing test runs in Somerset, between Bruton and Cogload near East Lyng.
Two more trains are due to arrive in the South West within the coming weeks as part of the test programme.
Spokesman Sam Fisk said: "Passengers will benefit from more seats, better on-board facilities and shorter journey times.
"The Intercity Express Train is also designed to withstand the region’s variable weather conditions, including routes along the Dawlish coast.
"These new trains harness Hitachi’s Japanese bullet train technology and will offer a step-change in the journey experience for passengers."
Berry Sas, Projects Director at Hitachi Rail Europe, added: "This is an exciting milestone for our team as we ensure the trains are delivered on time and in top condition.
"Passengers and enthusiasts will be able to catch glimpses of the new trains as they begin regular test runs in the region."
Click play to hear Sam Fisk talking about the research which has gone into 'Dawlish-proofing' the trains