Las Avellanas surf break

Las Avellanas surfForecast / Guanacaste / Costa Rica

information circle12 Day Weather and Surf, issued 5 pm Friday 05 Dec 2025 CST
Forecast update in hr  min  s Forecast update imminent
Las Avellanas surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Las Avellanas sea temperature is
28.1° C
(Which is 1.0°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Las Avellanas this week:

The surf forecast for Las Avellanas over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 05) at 9PM. The primary swell is predicted to be 0.6m and 14s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Las Avellanas in the next 12 days are 0.8m 14s and forecast to arrive on Tuesday (Dec 09) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Sunday (Dec 07) at 3AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 5th Dec)2ft (0.6m) 14s
Best Surf 9PM (Fri 5th Dec)2ft (0.6m) 14s
Most Powerful 9AM (Tue 9th Dec)2.5ft (0.8m) 14s

Table - best surf conditions forecast for Las Avellanas over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 10mm), heaviest on Sun afternoon. Warm (max 29°C on Fri afternoon, min 23°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Mon night. Warm (max 29°C on Thu morning, min 23°C on Tue night). Wind will be generally light.

Fri
05
Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
2
1
1
1
1
0
1
1
0
2
2
1
1
1
2
2
1
0
1
1
Swell
Height Map
Wave Height (m) & direction (?)
0.5
SW
0.4
WNW
0.5
SW
0.6
SSW
0.5
SW
0.4
WNW
0.4
NW
0.4
SW
0.4
SSW
0.5
SSW
0.6
SSW
0.8
SSW
0.7
SSW
0.4
SW
0.6
SSW
0.7
SSW
0.7
SSW
0.7
SSW
0.6
SSW
0.6
SSW
0.5
SSW
Period(s) (?)14181313131616121615151413116141312121212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1031268711610398735183123167207187332719817616011511377
Wind
(km/h)
5
SSW
10
E
10
ENE
10
SW
10
ENE
5
E
10
SSW
10
SE
0
E
5
WSW
5
E
5
NNE
10
WSW
5
E
15
ENE
5
NNE
15
E
20
ENE
5
WSW
10
ENE
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassoffcross-
off
cross-
on
offoffcrosscross-
off
glasscross-
on
offglassonglasscross-
off
glassoffoffcross-
on
offcross-
off
High Tide
/ height (m)
2:58AM
2.74
3:35PM
2.46
3:50AM
2.71
4:27PM
2.48
4:41AM
2.63
5:19PM
2.45
5:33AM
2.50
6:11PM
2.40
6:25AM
2.34
7:05PM
2.33
7:19AM
2.17
8:00PM
2.25
8:17AM
2.02
Low Tide
/ height (m)
8:43PM
0.14
9:23AM
-0.09
9:37PM
0.13
10:13AM
-0.08
10:30PM
0.16
11:03AM
-0.02
11:24PM
0.25
11:53AM
0.09
12:19AM
0.37
12:44PM
0.22
1:16AM
0.49
1:36PM
0.38
2:16AM
0.59
Fri
05
Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Sunrise--5:47--5:48--5:48--5:48--5:48--5:50--5:50
Sunset5:20--5:20--5:21--5:21--5:21--5:22--5:22--
clear
clear
part cloud
part cloud
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
clear
part cloud
thunderstorm
clear
clear
thunderstorm
clear
clear
Rain (mm)
----1152118-1--2--2--
Temp. °C292628272527272527272528272528282529272529
Feels °C (?)323031302830292730302832302929312732302931
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Las Avellanas Surf forecast

The above surf forecast table for Las Avellanas provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Las Avellanas can be found by selecting the local surf guide option on the grey menu. Our Las Avellanas surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Las Avellanas) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Las Avellanas may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Las Avellanas is 45 km (28 miles) from Nicoya. If you plan a holiday in Guanacaste, look for hotels and other accommodation in Nicoya. Nicoya has rooms for a wide range of budgets as well as car hire and transport links.

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