Not exactly close to SJ....rather far. Puerto viejo on the southern caribbean is a great little place. Avoid Limon for it doesnt look as enticing. Chaquita is nice as well just a little north of PV. The best place I have found is La Costa De Papito cababns. (
www.greencoast.com). Comfy, convienent and rather nice for that area. Not to $$$. The heat and humidity is not so bad either. I am in FL and it beats this place. Rain in the summer is often like clock work. Afternoon or night time showers but it doesn't spike the humidity after the showers. It's my favorite destination as for beaches. Everyones friendly and a decent night life. PM me if you want more details as I am heading there this May.