Taking into account the local weather in Tarkwa is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually January and February with an average temp of 81°F, while the coldest months are August and July with an average of 76°F. The rainiest months in Tarkwa are June, May, October, and September, with each month seeing an average of 13 inches of rainfall.