Whale Watch Kaikoura is overwhelmed by the support they have received following a temporary closure, while operations are assessed after Monday's quake.

General manager Kauahi Ngapora said he and his team are thankful for all of those who have reached out and are overwhelmed by the resilience of those affected by the disaster.

"My thanks and tautoko go to all those who have been affected, and to those who have done what they can to help our community and others that have been severely impacted by this disaster.

"Our priority since the quake has been our whanau, staff, visitors and community and to do what we can to support them at this time."

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With roads to Kaikoura blocked, key infrastructure being addressed and water depth issues within the marina it is too early to say when the Whale Watch Kaikoura team would be back on the water, said Ngapora.

"In the meantime my team and I will continue to do what we can to support and help get our community and our whanau and friends back on their feet."

Ngapora said whanau and the health and well-being of those affected must be the focus at this stage.

"Kaikoura is a town of incredible resilience and character and we will come back from this."

Whale Watch Kaikoura is one of the country's most popular tourist attractions.

Meanwhile Xero co-founder Philip Fierlinger has posted a picture on Twitter to illustrate the dramatic difference between the Kaikoura coastline before and after Monday's magnitude 7.8 earthquake, which has also lifted the seabed in places along the coast between Marlborough and Kaikoura.