Avellanas Rivermouth Surf Forecast and Surf Reports

(Guanacaste, Costa Rica)

Forecast
- Hourly Forecast
- 16 Day Forecast
Maps
Live
- Live Weather
- Surf Webcam
Weather State
Spot Information

Avellanas Rivermouth Surf Guide

Avellanas Rivermouth in Guanacaste is an exposed sandbar break that has fairly consistent surf Offshore winds are from the west. Groundswells are more common than windswells and the ideal swell direction is from the south. The sandbar breaks offer lefts and rights. When the surf is up, crowds are likely Watch out for dangerous rips.

Avellanas Rivermouth Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Sandbar	3	fairly consistent	30.1°C*ocean temperature recorded from satellite

Surfing Avellanas Rivermouth:

The best conditions reported for surf at Avellanas Rivermouth occur when a South swell combines with an offshore wind direction from the West.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Avellanas Rivermouth (for consistent clean waves)?

septemberBest Season: summer

The best time of year for surfing Avellanas Rivermouth with consistent clean waves (rideable swell with light / offshore winds) is during Summer and most often the month of September. Clean surfable waves are typically found 73% of the time in September while 25% of the time it tends to be blown out. For the remaining 2% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

73%

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

25%

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Avellanas Rivermouth Location Map

Interactive Avellanas Rivermouth surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Avellanas Rivermouth is Nosara Airport (NOB) in Costa Rica, which is 35 km (22 miles) away (directly). The second nearest airport to Avellanas Rivermouth is Daniel Oduber Quiros International (Liberia) Airport (LIR), also in Costa Rica, 51 km (32 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Avellanas Rivermouth Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Tuesday, 5 May 2026, 22:53 Local Time

m, °C	Tue	Wednesday 06
ft, °F	9PM	0AM	3AM	6AM
Wave (m)	SW	SW	SW	SW
Period (s)	14	14	15	15
Wind (km/h)
Wind State	cross- on	on	glass	on

Tides at Avellanas Rivermouth

Current tide and informaton

For Junquillal, 8 km from Avellanas Rivermouth.

Next High Water: 05:34am | 2.04m

Next Low Water: 11:23pm | 0.35m

NEXT	IS AT (local time)	remaining
high tide
low tide

Avellanas Rivermouth Sea Temperature

Hot air temperatures, feeling like 30.0 °C once we account for wind, and very warm water temperature (30.1 °C) at Avellanas Rivermouth. Clouds should reduce UV so boardshorts and a rash vest should be ok.

Today, many surfers would wear a rashvest wetsuit.

Current Temp*: 30.1°C*ocean temperature recorded from satellite