When is there a rain season in Costa Rica Pacific coast?

Question

I want to go there in the middle of the march. What is the temperature of air and water?

Answer 1

Costa Rica's dry season is from late November to mid April and the rainy season from May to mid November.  During March the Pacific coast is very warm and dry.  Water temperatures are also warm. Conditions vary somewhat depending on the exact location on the Pacific.  More information is given below:

1. North Pacific

This region includes the province of Guanacaste, the western section of the province of Alajuela and the northern section of the Puntarenas Province. This is one of Costa Rica’s most visited regions as it includes some of the country’s most dazzling beaches (Tambor, Sámara and Flamingo among others). Liberia, Its main city, has an average annual temperature of 82 F (28 C) with high temperatures above 90 F (32 C) from February through April. Although this is Costa Rica’s sunniest region, you can expect regular afternoon showers from June through October – excluding a traditional dry spell in July called “veranillo” or little summer. The North Pacific has an average annual rainfall of 55 inches (1400 mm) and boasts its sunniest months from January through April.

2.  Central Pacific

This coastal region includes parts of the provinces of Puntarenas and San José starting from the Tárcoles River down to the the Barú River. This area includes the well-visited beach communities of Jacó, Dominical, Uvita, Quepos (near Manuel Antonio National Park) and Puntarenas to the north. In Puntarenas, daytime temperatures may reach the low nineties (above 32 degrees Centigrade) throughout the year. March through May are usually considered the hottest months, although at the beaches, refreshing breezes moderate the heat. The dry season in this area lasts from about January through March, which means rain showers will occur most afternoons at other times of year.

3.  South Pacific

Part of the province of Puntarenas, this region boasts some of Costa Rica’s most varied topography including high mountains and vast tracks of pristine rainforest located in the Osa Peninsula. This area has a very distinct dry (January to mid April) and rainy season (May through December). Temperatures near the coast do not vary much and average from the low 80’s through low 90’s (upper 20’s to low 30’s Centigrade) throughout the year. In the Valle del General (General Valley) expect more moderate temperatures (high 70’s to low 80’s) and morning temperatures as low as 50 degrees Fahrenheit (10 C) in the higher elevations. Precipitation varies widely from 120 inches (3000 mm) in the Valle del General to 200 inches (5000 mm) in the Osa Peninsula. The rainiest month in this area tends to be October, while the driest month is usually February.

Answer 2

I would check at www.frommers.com.  It gives some overviews.  I'm going in June i hope it's nice!