Rivermouth at Avellanas

Rivermouth at Avellanas in Guanacaste, Costa Rica is a classic tropical beachbreak with a river mouth twist. It’s known for sandy-bottom waves that can be fun and fairly playful, with the river influence helping shape shifting peaks and occasional rippable sections. Conditions can change quickly depending on sandbars, tide, and swell direction, so it’s a spot that rewards locals’ knowledge and a bit of patience.

Wave type

• Mostly beachbreak
• Can produce lefts and rights
• River mouth can create more defined peaks and better shape than nearby open beach sections

Best conditions

• Usually works best with a clean swell and light offshore winds
• Often better when there’s a solid SW swell
• Tide matters a lot: different sandbar setups can make it better at mid or higher tide, but this shifts with the season

Skill level

• Can be friendly for intermediate surfers when it’s small and organized
• On bigger swells, it can become fast, punchy, and more challenging
• The current near the river mouth can be something to watch, especially after rain or strong flow

Vibe

• Tropical, scenic, and relatively laid-back
• Near the Avellanas area, which is known for a mix of surf, nature, and a less crowded feel compared with Costa Rica’s busier surf towns

Watch-outs

• Shifting sandbars mean the wave quality changes often
• Currents can be strong around the rivermouth
• After rain, the river can affect water quality and the shape of the waves