Gokarna provides a very semi tropical climate since it falls in the Southern part of India. The temperatures generally stay between 14 degree Celsius to 40 degree Celsius in all seasons. So plan your trip accordingly.
Summer (March – May): Summers can get scorching hot as it can go up to 40 degree Celsius. The weather is generally dry at those times. This is basically off-season in Gokarna.
Monsoon (June – August): India is one of the few countries that have a separate season for monsoon. During these months Gokarna experiences the southwest monsoon weather.
Winter (September to February): Although not exactly winter but still this season remains as the good season since the weather is pleasant. Neither too hot and nor too cold!
So, the best time to visit Gokarna is in the months of September to February.