The storm came close to Vava'u twice last week before increasing in intensity and hitting Fiji.
Masina Talakai said teams were out compiling a full report on the damage to homes and crops.
Earlier assessments said 10 houses had been destroyed with 200 more left damaged.
Ms Talakai pointed out that everyone in Vava'u was quick to help clean up the damage once Winston passed.
"Well the people here are so thankful and I think it's the Lord that saved Tonga from this cyclone and they are not that badly affected."