Feb 08, 14 · The rest of Costa Rica (especially down south) has a completely different weather pattern with a lot more rain Tamarindo is unique with its' constant sunshine and great weather December & January This is our VERY favorite time of year in Tamarindo Rainy season has just ended so the entire town is green and in bloom The weather is perfectThe halfday tour is generally best for inshore fishing, where anglers might reel in Roosterfish, Snapper, and Amberjack Fishing in Tamarindo is generally great all year, but Billfish are most abundant midApril to August Related Article Best Places for Sportfishing in Costa Rica More Things to Do in Tamarindo Nightlife;Daytime temperatures usually reach 31°C in Tamarindo in August with very high heat and humidity, falling to 23°C at night How sunny is it in Tamarindo in August? Average Monthly Rainfall And Snow In Tilaran Guanacaste Costa Rica Millimeter Is it ok to go to costa rica in august