Guilmarl was the southernmost city in Dambrath located along the coast on the Great Sea. Violent storms assaulted the city for the entire three-month rainy season. Many of the wealthier citizens opted to winter in calmer cities.
Many pirate and merchant ships harbored in Guilmarl outside of the rainy season, using the city as a launching point for Zakhara, Halruaa, and beyond. The main factor keeping the city from fading away was its superb pearl beds, allowing at least half of the population to earn a living revolving around the pearl trade.