Diria Surf Forecast

/ Guanacaste (28 surf breaks) /

Costa Rica (96 surf breaks) / Lat Long: (10.32° N 85.84° W)

Surf Forecasts:

Diria surfForecast / Guanacaste / Costa Rica

12 Day Weather and Surf, issued 11 pm Tuesday 07 Oct 2025 CST

Forecast update in hr min s Forecast update imminent

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

Today's Diria sea temperature is 28.8° C
(Which is 1.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Diria this week:

The surf forecast for Diria over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Oct 08) at 6AM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 0.9m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Diria in the next 12 days are 1.1m 15s and forecast to arrive on Sunday (Oct 12) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 13s period and expected on Friday (Oct 10) at 3AM.

Wave Type	Time (CST) & Date	Wave Height & Period
Next good surf (1 star+)	6AM (Wed 8th Oct)	2.5ft (0.7m) 16s
Best Surf	6AM (Wed 8th Oct)	2.5ft (0.7m) 16s
Most Powerful	12PM (Sun 12th Oct)	3.5ft (1.1m) 15s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Heavy rain (total 48mm), heaviest during Thu night. Warm (max 29°C on Wed morning, min 24°C on Thu night). Wind will be generally light.										Days 3-6 Weather Summary Heavy rain (total 26mm), heaviest during Fri night. Warm (max 27°C on Sat morning, min 24°C on Sat night). Wind will be generally light.
		Wednesday 08			Thursday 09			Friday 10			Saturday 11			Sunday 12			Monday 13			Tue 14
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	2	3	2	2	2	2	2	1	0	1	2	1	2	3	1	3	3	1	2	2	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	W	W	W	W	W	WNW	WNW	WNW	WNW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	18	12	12	11	11	11	11	10	10	9	16	16	17	15	15	15	14	14	14	13	13
Wave Graph (?)
kJ (?)	318	350	404	371	291	291	198	146	133	84	157	310	358	435	492	424	401	390	336	208	205
Wind (km/h)	WNW	ESE	SW	ESE	NE	W	ENE	N	WSW	E	SSE	S	SSW	SSE	S	SE	SSE	SSW	SSE	SE	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	cross- off	cross- on	glass	glass	glass	off	cross	on	glass	cross- off	cross	cross	cross- off	cross	cross- off	cross- off	cross	cross- off	cross- off	cross- on
High Tide / height (m)	2:53AM 2.75		3:20PM 2.51		3:38AM 2.82	4:06PM 2.52		4:24AM 2.80	4:54PM 2.48		5:12AM 2.70	5:44PM 2.38		6:03AM 2.55		6:38PM 2.25	6:59AM 2.36		7:39PM 2.12	8:02AM 2.18
Low Tide / height (m)		9:13AM -0.03		9:22PM 0.05	9:58AM -0.09		10:09PM 0.04	10:45AM -0.07		10:57PM 0.09	11:34AM 0.02		11:47PM 0.21		12:26PM 0.16	12:43AM 0.37		1:24PM 0.32	1:47AM 0.53		2:30PM 0.46

		Wednesday 08			Thursday 09			Friday 10			Saturday 11			Sunday 12			Monday 13			Tue 14
Sunrise	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-
Sunset	-	-	5:29	-	-	5:29	-	-	5:28	-	-	5:28	-	-	5:27	-	-	5:27	-	-	5:25

Rain (mm)	4	-	3	5	1	15	17	-	3	6	2	2	7	1	-	2	3	3	6	-	3
Temp. °C	27	29	28	27	28	26	24	27	27	25	27	27	25	25	25	25	27	25	24	26	26
Feels °C (?)	31	34	32	31	32	31	28	30	30	30	29	29	28	28	27	28	29	26	27	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 Light wind has turned cross-on at Diria (moderate winds from the NW at SHIP508 122 km from Diria). 0.8m 9s swell from the W with a 0.7m 13s groundswell from the SW. 2 swells combining to make bigger set waves.
2 hours 44 minutes ago Diria

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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 Diria 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 Diria Surf forecast

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

Diria is 47 km (29 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.