Las Avellanas Surf Forecast

/ Guanacaste (28 surf breaks) /

Costa Rica (96 surf breaks) / Lat Long: (10.24° N 85.85° W)

Surf Forecasts:

Las Avellanas surfForecast / Guanacaste / Costa Rica

12 Day Weather and Surf, issued 11 pm Sunday 19 Oct 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 slightly warmer than usual)

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 Monday (Oct 20) at 3AM. The primary swell is predicted to be 1.1m 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 1.1m 14s and forecast to arrive on Monday (Oct 20) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Friday (Oct 24) at 6AM.

Wave Type	Time (CST) & Date	Wave Height & Period
Next good surf (1 star+)	3AM (Mon 20th Oct)	3.5ft (1.1m) 14s
Best Surf	12PM (Tue 21st Oct)	3ft (0.9m) 14s
Most Powerful	3AM (Mon 20th Oct)	3.5ft (1.1m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 33mm), heaviest during Wed afternoon. Warm (max 28°C on Mon morning, min 24°C on Mon night). Wind will be generally light.										Days 3-6 Weather Summary Heavy rain (total 82mm), heaviest during Fri morning. Warm (max 27°C on Thu morning, min 24°C on Thu night). Wind will be generally light.
		Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sun 26
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	1	1	1	2	2	3	2	2	2	2	2	2	2	2	1	2	1	1	2	2	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SSW	SSW	SW	SSW	SSW	SW	SW
Period(s) (?)	14	16	16	14	14	14	14	16	16	16	15	14	14	14	7	7	13	7	7	18	18
Wave Graph (?)
kJ (?)	346	239	236	284	293	297	241	248	302	291	309	305	245	147	186	151	113	166	155	157	201
Wind (km/h)	W	NW	W	E	NE	NE	ENE	E	N	ESE	ESE	SSE	SSE	ESE	SSE	SE	ESE	S	SSE	SE	SSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	cross- on	on	off	cross- off	cross- off	off	off	glass	glass	glass	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross	cross- off	cross- off	cross
High Tide / height (m)	1:39AM 2.32		2:04PM 2.17	2:15AM 2.38		2:41PM 2.21	2:50AM 2.41		3:16PM 2.22		3:24AM 2.42	3:51PM 2.21		3:59AM 2.39	4:27PM 2.17		4:34AM 2.32	5:03PM 2.09		5:10AM 2.24	5:41PM 2.00
Low Tide / height (m)		7:57AM 0.37		8:04PM 0.44	8:34AM 0.29		8:40PM 0.41	9:09AM 0.24		9:15PM 0.39	9:44AM 0.23		9:50PM 0.41	10:19AM 0.25		10:24PM 0.45	10:54AM 0.31		11:00PM 0.52	11:31AM 0.40

		Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sun 26
Sunrise	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:33	-
Sunset	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:21	-	-	5:21

Rain (mm)	2	4	7	1	1	6	-	1	11	1	4	13	13	15	7	8	9	12	1	2	9
Temp. °C	26	28	28	25	28	27	24	27	27	26	27	27	25	25	26	25	27	26	25	27	27
Feels °C (?)	30	32	32	28	31	31	26	31	32	30	32	31	28	28	27	28	31	29	28	30	29

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

Recent Eyeball Surf Reports for Guanacaste

Wind Update Continuing clean conditions at Las Avellanas (light winds from the ENE at Liberia/Tomas Guardia Airport 52 km from Las Avellanas). 0.8m 14s groundswell from the SW with a 0.6m 6s windswell from the WSW. 2 swells combining to make bigger set waves.
1 hour 51 minutes ago Las Avellanas

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Las Avellanas surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

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.