Backwash Surf Forecast

/ Golfo Dulce (13 surf breaks) /

Costa Rica (96 surf breaks) / Lat Long: (8.41° N 83.28° W)

Surf Forecasts:

Backwash surfForecast / Golfo Dulce / Costa Rica

12 Day Weather and Surf, issued 11 pm Wednesday 17 Sep 2025 CST

Forecast update in hr min s Forecast update imminent

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

Today's Backwash sea temperature is 29.2° C
(Which is 1.3°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Backwash this week:

The surf forecast for Backwash 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 1.3m and 14s period with a secondary swell of 0.8m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Backwash in the next 12 days are 1.3m 14s and forecast to arrive on Thursday (Sep 18) at 6AM. 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+)	6AM (Thu 18th Sep)	4.5ft (1.3m) 14s
Best Surf	6AM (Thu 18th Sep)	4.5ft (1.3m) 14s
Most Powerful	6AM (Thu 18th Sep)	4.5ft (1.3m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 32mm), heaviest during Wed night. Warm (max 28°C on Sat morning, min 24°C on Thu night). Wind will be generally light.										Days 3-6 Weather Summary Heavy rain (total 25mm), heaviest during Mon morning. Warm (max 28°C on Sun afternoon, min 25°C on Sat night). Wind will be generally light.
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	3	3	3	2	2	2	2	2	2	1	1	1	1	1	1	2	2	1	2	2	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SSW	SSW	SW	S	S
Period(s) (?)	14	14	14	13	13	13	12	12	12	12	12	12	11	6	12	18	13	12	16	12	11
Wave Graph (?)
kJ (?)	899	712	586	434	569	321	350	333	230	161	156	150	68	57	152	152	225	202	299	279	265
Wind (km/h)	SSW	SSW	W	NNW	ENE	WSW	NNE	SSE	WSW	NNW	WNW	WSW	WNW	W	WSW	WNW	SSW	SW	NNW	WNW	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	glass	cross- off	cross- off	glass	cross- off	glass	glass	cross- off	off	glass	cross- off	cross- off	cross- off	cross- off	off	glass	cross	off	glass	cross- off
High Tide / height (m)			12:06PM 2.51	12:46AM 2.58		1:04PM 2.62	1:34AM 2.73		1:51PM 2.72	2:14AM 2.87		2:32PM 2.81	2:51AM 2.96		3:09PM 2.85		3:24AM 3.00	3:44PM 2.86		3:57AM 3.00	4:19PM 2.82
Low Tide / height (m)		5:54AM 0.82		6:26PM 0.60	6:54AM 0.69		7:17PM 0.50	7:43AM 0.54		8:00PM 0.42	8:25AM 0.42		8:38PM 0.36	9:02AM 0.33		9:13PM 0.34	9:37AM 0.27		9:47PM 0.35	10:11AM 0.27

		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wed 24
Sunrise	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-	-	5:22	-
Sunset	-	-	5:30	-	-	5:30	-	-	5:30	-	-	5:29	-	-	5:29	-	-	5:28	-	-	5:28

Rain (mm)	12	4	3	-	1	5	1	2	4	2	-	2	3	6	4	4	1	3	-	1	2
Temp. °C	25	26	26	25	27	27	25	28	27	26	27	28	26	27	27	25	27	28	26	28	28
Feels °C (?)	29	30	29	29	31	30	29	32	30	30	31	31	30	30	30	28	30	31	30	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 Dulce

Wind Update Continuing clean conditions at Backwash (calm at Puerto Armuelles wx 48 km from Backwash). 1.1m 14s groundswell from the SSW with a 0.7m 6s windswell from the S and a 0.5m 6s windswell from the WSW. 3 swells combining to make bigger set waves.
1 hour 30 minutes ago Backwash

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48 km away, 1 h 30 min ago

5 km/h

0.0

29.2

Air / Water (°C)

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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 Backwash 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 Backwash Surf forecast

The above surf forecast table for Backwash provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Backwash can be found by selecting the local surf guide option on the grey menu. Our Backwash 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 (Backwash) 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 Backwash 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 Dulce? If you are looking for accommodation near Backwash, camping, hotels and holiday cottages in Golfo Dulce, consider staying in Golfito which is 28 km (17 miles) away. Other places in and around Golfo Dulce where you can find information about places to rent, and car hire include Puerto Armuelles which is 48 km (30 miles) away, La Concepcion, Pedregal and David.