Surf Forecasts:
Cabo Blanco surf forecast from 19 Aug 2026:
- Best quality surf: Friday 21 Aug, 4AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 4.5ft (1.4m), 12s period, SSW swell with 521 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 4AM (local time) - 2.5ft (0.8m), 16s period with SW swell.
Best Forecast Surf Conditions for Cabo Blanco this week:
The surf forecast for Cabo Blanco over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 4AM. The primary swell is predicted to be 0.8m 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 Cabo Blanco in the next 16 days are 1.4m 12s and forecast to arrive on Thursday (Aug 20) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 19th Aug) | 2.5ft (0.8m) 16s |
| Best Surf | 4AM (Fri 21st Aug) | 4.5ft (1.4m) 11s |
| Most Powerful | 10PM (Thu 20th Aug) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Cabo Blanco over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let’s break down the next couple of weeks on the water.
We’ve got a solid run of south-west groundswells, nothing massive but consistent. The pattern is the same all the way through: clean, glassy mornings that get ruined by stormy afternoons. The water is a warm 87°F, which is way warmer than usual for this time of year.
The standout spot is Cabo Blanco. The best bet is to paddle out early. Thursday morning the 20th of August kicks things off with a 3ft SSW swell at 10 seconds (311 energy) under glass – a clean little wave. Friday morning the 21st is better: 5ft of SSW swell at 11 seconds (500 energy) with dead calm wind. That’s a proper wave. The real highlight is Saturday morning the 29th of August: 4ft of SW groundswell at 17 seconds with a massive 875 energy, and it’s glassy. That’s a long-period, powerful swell for a relatively small size, and it’ll be peeling perfectly. Get there early.
There’s a lull around the 25th of August where the swell drops to 2ft, but it’s still surfable, just small.
Heading into the second week, from the 30th of August and into September, the swell sits in the 4ft to 5ft range from the SSW. The mornings are still the move, with glassy conditions and a clean cross-off breeze on the 30th. It’s a good run, but that Saturday morning the 29th is the one to aim for.
The afternoons are a write-off, so don’t bother. Set the alarm, get the coffee going, and get out there for the dawn patrol. The 29th of August is circled on the calendar.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Wed afternoon. Warm (max 29°C on Fri morning, min 25°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 26mm), heaviest during Sat afternoon. Warm (max 29°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 15 | SW 16 | SW 15 | SW 14 | SSW 10 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | SSW 14 | SW 18 | SSW 18 | SW 18 | SSW 17 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 258 | 362 | 217 | 214 | 163 | 166 | 394 | 488 | 463 | 430 | 270 | 204 | 154 | 154 | 121 | 168 | 216 | 155 | 202 | 274 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | on | glassy | glassy | glassy | cross | glassy | on | glassy | glassy | cross-on | cross-off | glassy | cross-on | glassy | glassy | on | glassy |
High Tide | 7:44PM2.60m | 8:03AM2.73m | 8:30PM2.40m | 8:48AM2.53m | 9:21PM2.22m | 9:40AM2.37m | 10:24PM2.09m | 10:44AM2.26m | 11:39PM2.05m | 11:56AM2.24m | 00:52AM2.11m | 1:02PM2.31m | 1:49AM2.24m | |||||||
Low Tide | 1:48AM0.59m | 2:23PM0.61m | 2:32AM0.78m | 3:13PM0.77m | 3:23AM0.95m | 4:13PM0.89m | 4:25AM1.08m | 5:23PM0.94m | 5:38AM1.12m | 6:32PM0.90m | 6:49AM1.07m | 7:31PM0.80m | ||||||||
 |  | | | |  |  |  |  | | | | | | | | |  | | | |
 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | 2 | 3 | 3 | 6 | 1 | 1 | 7 | — | — | — | 1 | 1 | 8 | 2 | 2 | 7 | 5 | — | 6 | 7 |
Temp °C | 28 | 27 | 28 | 28 | 26 | 28 | 27 | 26 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 32 | 32 | 32 | 32 | 31 | 32 | 31 | 31 | 33 | 32 | 32 | 33 | 33 | 31 | 33 | 32 | 32 | 33 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | S 10 | SSW 10 | S 9 | S 9 | S 9 | S 10 | S 10 | SW 16 |
| kJ | 120 | 137 | 129 | 146 | 163 | 166 | 394 | 488 | 463 | 430 | 270 | 204 | 154 | 154 | 113 | 113 | 113 | 90 | 90 | 274 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | S 12 | WSW 6 | WSW 6 | WSW 6 | SW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 18 | SW 12 | SSW 17 | SSW 6 |
| kJ | 258 | 362 | 217 | 214 | 160 | 116 | 47 | 12 | 7 | 6 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 18 |
Swell 3 Height (m) Direction Period (s) | S 12 | W 8 | WSW 6 | — | S 14 | S 13 | SW 18 | SW 19 | SSW 18 | SSW 18 | S 11 | WSW 6 | SSW 20 | SW 20 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 12 | S 9 |
| kJ | 3 | 1 | 3 | — | 4 | 29 | 12 | 14 | 30 | 30 | 38 | 6 | 38 | 60 | 96 | 168 | 114 | 155 | 57 | 38 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | WSW 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 7 | 0 | 0 | 16 | 0 | 0 | 0 | 7 | 0 | 123 | 0 | 0 | 15 | 0 | 0 | 16 | 0 | 0 | 152 | 0 |
Best forecast wave conditions in Golfo Dulce | ||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||
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Information about the Cabo Blanco Surf forecast
The above surf forecast table for Cabo Blanco provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cabo Blanco can be found by selecting the local surf guide option on the grey menu. Our Cabo Blanco 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 (Cabo Blanco) 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 Cabo Blanco 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 Cabo Blanco, camping, hotels and holiday cottages in Golfo Dulce, consider staying in Golfito which is 31 km (19 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 32 km (20 miles) away, La Concepcion, Pedregal and David.
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