Just before 12pm on Thursday, emergency services were called to a property in Araluen Road in Deua River Valley, about 18km northwest of Moruya, following reports of a fire.
The fire quickly spread to the nearby Wandera State Forest and is continuing to burn through more than 40 hectares of bushland.
Following inquiries, officers from South Coast Police District spoke to the man about 11.30am yesterday.
The man was granted strict conditional bail and is due to appear at Moruya Local Court on Friday 10 January.
The charges come as NSW firefighters battle over 70 bush and grass fires, of which 33 are uncontained.
High temperatures have prompted total fire bans in three regions of NSW; the southern ranges, southern slopes and Monaro alpine areas.
Very high fire danger is forecast for nine NSW regions and the ACT.
The rising temperatures come after firefighters spent the past five days striving to contain large and complex bushfires before conditions worsen.