Surf Forecasts:
Backwash surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 12PM (local time) - 2.5ft (0.8m), 14s period, SW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 12AM (local time) - 4.5ft (1.4m), 12s period, SSW swell with 521 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 12PM (local time) - 2.5ft (0.8m), 14s period with SW swell.
Best Forecast Surf Conditions for Backwash this week:
The surf forecast for Backwash over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 12PM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 1.1m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Backwash in the next 16 days are 1.4m 12s and forecast to arrive on Friday (Aug 21) at 12AM. Winds are predicted to be offshore at the time the swell arrives.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 17th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 12PM (Mon 17th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 12AM (Fri 21st Aug) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Backwash over the next 16 days.
Short Range ForecastModerate rain (total 10mm), heaviest on Mon afternoon. Warm (max 28°C on Wed afternoon, min 24°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 29°C on Sat afternoon, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | SSW 14 | SW 18 | SSW 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 231 | 280 | 268 | 288 | 258 | 362 | 217 | 214 | 160 | 166 | 340 | 521 | 463 | 447 | 270 | 204 | 196 | 150 | 121 | 168 | 216 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | cross-on | glassy | glassy | glassy | cross-on | glassy | glassy | cross | off | glassy | cross-off | off | glassy | cross-off | off | glassy | cross | glassy |
High Tide | 6:01PM2.79m | 6:21AM2.92m | 6:44PM2.60m | 7:03AM2.73m | 7:30PM2.40m | 7:48AM2.53m | 8:21PM2.22m | 8:40AM2.37m | 9:24PM2.09m | 9:44AM2.26m | 10:39PM2.05m | 10:56AM2.24m | 11:51PM2.11m | ||||||||
Low Tide | 11:56AM0.30m | 00:06AM0.39m | 12:39PM0.45m | 00:48AM0.59m | 1:23PM0.61m | 1:32AM0.78m | 2:13PM0.77m | 2:23AM0.95m | 3:13PM0.89m | 3:25AM1.08m | 4:23PM0.94m | 4:38AM1.12m | 5:32PM0.91m | ||||||||
 |  |  |  | | |  | |  | | | | | |  | | | |  | | | |
 | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 5:47 | — | — | 5:47 | — | — | 5:46 | — | — | 5:46 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | 4 | 2 | 1 | — | 3 | — | — | — | — | 2 | — | — | 2 | 2 | 1 | 2 | 1 | — | 2 | 1 |
Temp °C | 26 | 27 | 25 | 26 | 27 | 26 | 27 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 29 | 27 |
Feels °C | 30 | 32 | 29 | 29 | 31 | 30 | 31 | 32 | 30 | 32 | 32 | 32 | 32 | 31 | 32 | 33 | 33 | 32 | 34 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | S 7 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | S 9 | S 9 | S 10 |
| kJ | 140 | 114 | 83 | 127 | 120 | 134 | 137 | 143 | 156 | 166 | 340 | 521 | 463 | 447 | 270 | 204 | 196 | 150 | 113 | 113 | 117 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | S 12 | SW 19 | SSW 18 | SSW 18 | SW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 18 |
| kJ | 231 | 280 | 268 | 288 | 258 | 362 | 217 | 214 | 160 | 116 | 47 | 14 | 30 | 30 | 127 | 119 | 142 | 136 | 121 | 116 | 216 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 10 | WSW 6 | S 13 | S 12 | NW 8 | W 7 | — | S 14 | S 13 | SW 18 | SW 16 | — | SW 15 | S 11 | SSW 21 | SSW 20 | SW 20 | SW 19 | SW 18 | SSW 13 |
| kJ | 19 | 18 | 15 | 3 | 3 | 2 | 1 | — | 4 | 29 | 12 | 10 | — | 8 | 38 | 44 | 38 | 60 | 96 | 168 | 114 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 16 | 0 | 0 | 0 | 33 | 0 | 0 | 156 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 98 | 0 |
Best forecast wave conditions in Golfo Dulce | |||||||||||||||||||||
Best forecast wave conditions in Costa Rica | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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 16 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.
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