Guiones Surf Forecast

/ Guanacaste (28 surf breaks) /

Costa Rica (96 surf breaks) / Lat Long: (9.93° N 85.67° W)

Surf Forecasts:

Guiones surfForecast / Guanacaste / Costa Rica

12 Day Weather and Surf, issued 5 pm Wednesday 17 Sep 2025 CST

Forecast update in hr min s Forecast update imminent

Guiones surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Guiones sea temperature is 29.0° C
(Which is 1.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Guiones this week:

The surf forecast for Guiones over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 6AM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 0.8m and 14s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Guiones in the next 12 days are 1.3m 14s and forecast to arrive on Thursday (Sep 18) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave Type	Time (CST) & Date	Wave Height & Period
Next good surf (1 star+)	6AM (Thu 18th Sep)	3.5ft (1.0m) 14s
Best Surf	6AM (Thu 18th Sep)	3.5ft (1.0m) 14s
Most Powerful	12AM (Thu 18th Sep)	4.5ft (1.3m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 20mm), heaviest during Wed afternoon. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light.											Days 3-6 Weather Summary Heavy rain (total 20mm), heaviest during Sat afternoon. Warm (max 28°C on Sun afternoon, min 25°C on Sat night). Wind will be generally light.
	Wed 17		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	2	2	2	2	2	2	1	2	2	0	1	1	0	1	2	0	2	2	1	3	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SSW	SW	SW	SW	SSW	SW	S	SSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	15	14	14	14	14	13	13	13	13	13	15	15	14	13	13	13	18	16	16	16	15
Wave Graph (?)
kJ (?)	733	672	395	384	357	295	199	206	206	164	191	134	103	144	142	109	300	211	251	553	305
Wind (km/h)	SSW	SSE	SSW	SSW	ESE	SW	SW	NW	WSW	WSW	NW	NW	W	SSW	S	SSW	SSW	S	WSW	WNW	NNW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross	cross- on	cross- on	cross- off	glass	cross- on	glass	glass	on	cross	cross- on	cross- on	glass	glass	cross- on	glass	glass	on	glass	glass
High Tide / height (m)		11:34PM 1.80	11:57AM 1.90		12:37AM 1.90		12:56PM 1.96	1:27AM 2.02		1:45PM 2.03	2:09AM 2.12		2:27PM 2.08	2:47AM 2.20		3:06PM 2.11		3:22AM 2.24	3:42PM 2.11		3:56AM 2.24
Low Tide / height (m)	5:15PM 0.49		5:43AM 0.58		6:19PM 0.44	6:46AM 0.50		7:11PM 0.38	7:37AM 0.41		7:56PM 0.32	8:21AM 0.32		8:35PM 0.28	9:00AM 0.26		9:11PM 0.26	9:36AM 0.22		9:45PM 0.27	10:12AM 0.21

	Wed 17		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
Sunrise	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31
Sunset	5:42	-	-	5:40	-	-	5:39	-	-	5:39	-	-	5:38	-	-	5:37	-	-	5:37	-	-

Rain (mm)	3	7	4	1	-	-	1	2	2	3	2	1	2	2	2	1	4	3	1	-	-
Temp. °C	27	26	26	25	25	27	27	26	27	27	26	27	28	26	27	27	26	27	27	26	28
Feels °C (?)	30	29	29	28	28	30	30	31	32	30	31	30	32	31	31	30	30	32	31	30	31

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 Guiones (light winds from the SSE at DanielOduberInt. Airport 75 km from Guiones). 0.9m 14s groundswell from the SW with a 0.8m 14s groundswell from the SSW and a 0.5m 7s swell from the SW. 3 swells combining to make bigger set waves.
2 hours 19 minutes ago Guiones

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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 Guiones 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 Guiones Surf forecast

The above surf forecast table for Guiones provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Guiones can be found by selecting the local surf guide option on the grey menu. Our Guiones 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 (Guiones) 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 Guiones 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.

Guiones is 34 km (21 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.