Damas Rivermouth Surf Forecast

/ Golfo de Nicoya (40 surf breaks) /

Costa Rica (96 surf breaks) / Lat Long: (9.49° N 84.33° W)

Surf Forecasts:

Damas Rivermouth surfForecast / Golfo de Nicoya / Costa Rica

12 Day Weather and Surf, issued 5 am Thursday 18 Sep 2025 CST

Forecast update in hr min s Forecast update imminent

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

Today's Damas Rivermouth sea temperature is 29.1° C
(Which is 1.1°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Damas Rivermouth this week:

The surf forecast for Damas Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 9AM. The primary swell is predicted to be 1.1m and 14s period with a secondary swell of 0.6m and 7s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Damas Rivermouth in the next 12 days are 1.1m 14s and forecast to arrive on Thursday (Sep 18) at 9AM. Winds are predicted to be glassy at the time the swell arrives.

Wave Type	Time (CST) & Date	Wave Height & Period
Next good surf (1 star+)	9AM (Thu 18th Sep)	3.5ft (1.1m) 14s
Best Surf	9AM (Thu 18th Sep)	3.5ft (1.1m) 14s
Most Powerful	9AM (Thu 18th Sep)	3.5ft (1.1m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Moderate rain (total 17mm), heaviest on Thu morning. Warm (max 28°C on Sat morning, min 25°C on Thu morning). Wind will be generally light.									Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Mon afternoon. Warm (max 28°C on Sun morning, min 25°C on Sun night). Wind will be generally light.
	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	3	2	2	2	1	2	2	1	2	1	0	1	1	1	2	2	1	3	3	2	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SW	SSW	SW	SW	SW	SW
Period(s) (?)	14	14	13	13	13	12	12	12	12	12	12	11	11	12	18	16	13	16	15	14	14
Wave Graph (?)
kJ (?)	452	421	336	326	242	224	258	210	161	150	119	95	68	115	246	167	168	416	258	251	346
Wind (km/h)	S	W	NW	NE	SW	NNW	S	SSW	NNE	SSE	SW	N	S	SW	ENE	S	SW	NW	S	S	ENE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	cross	glass	glass	cross- on	glass	glass	cross- on	glass	on	cross- on	glass	glass	cross- on	glass	glass	cross- on	glass	glass	on	glass
High Tide / height (m)		12:01PM 2.28	12:42AM 2.31		1:00PM 2.36	1:31AM 2.45		1:48PM 2.45	2:12AM 2.57		2:30PM 2.52	2:49AM 2.66		3:08PM 2.56		3:24AM 2.70	3:44PM 2.56		3:57AM 2.70	4:18PM 2.53
Low Tide / height (m)			6:22PM 0.54	6:50AM 0.62		7:14PM 0.46	7:40AM 0.49		7:58PM 0.38	8:23AM 0.39		8:37PM 0.33	9:01AM 0.30		9:12PM 0.31	9:37AM 0.25		9:47PM 0.32	10:12AM 0.25		10:20PM 0.36

	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
Sunrise	5:26	-	-	5:26	-	-	5:26	-	-	5:26	-	-	5:26	-	-	5:26	-	-	5:26	-	-
Sunset	-	5:36	-	-	5:35	-	-	5:34	-	-	5:34	-	-	5:32	-	-	5:31	-	-	5:31	-

Rain (mm)	4	4	1	-	1	1	-	4	2	1	2	2	1	6	3	-	2	1	-	2	2
Temp. °C	26	26	25	27	27	26	28	28	26	28	27	26	27	27	25	27	28	26	28	28	26
Feels °C (?)	29	30	29	30	30	30	31	31	31	31	30	31	31	30	29	31	32	31	31	32	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 Golfo de Nicoya

Wind Update Continuing clean conditions at Damas Rivermouth (calm at Tobias Bolano Airport 54 km from Damas Rivermouth). 1.0m 14s groundswell from the SSW with a 0.6m 7s swell from the S and a 0.6m 8s swell from the WSW. 3 swells combining to make bigger set waves.
1 hour 38 minutes ago Damas Rivermouth

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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 Damas Rivermouth 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 Damas Rivermouth Surf forecast

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

Are you planning a holiday in Golfo de Nicoya? If you are looking for accommodation near Damas Rivermouth, camping, hotels and holiday cottages in Golfo de Nicoya, consider staying in Quepos which is 20 km (12 miles) away. Other places in and around Golfo de Nicoya where you can find information about places to rent, and car hire include Tejar which is 30 km (19 miles) away, San Rafael Abajo, Aserri and San Rafael Arriba.