Surf Forecasts:
Cabo Blanco surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 4.5ft (1.4m), 12s period, SSW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 1AM (local time) - 4.5ft (1.4m), 12s period, SSW swell with 512 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 3ft (0.9m), 10s period with SSW 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 Thursday (Aug 20) at 4AM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.6m and 14s. 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 Friday (Aug 21) at 1AM. 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 (Thu 20th Aug) | 3ft (0.9m) 10s |
| Best Surf | 10PM (Thu 20th Aug) | 4.5ft (1.4m) 12s |
| Most Powerful | 1AM (Fri 21st Aug) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Cabo Blanco over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for the next couple of weeks.
We’re looking at a slow start, so don’t bother paddling out until the 20th. The real story here is a run of beautiful, clean mornings that pop up later in the forecast.
The first real chance to get wet is on Thursday morning, the 20th of August. It’s glassy as can be at Cabo Blanco, with no wind, and a small 3ft swell from the south-southwest. The energy is moderate (311), and the water is a warm 87°, which is much warmer than usual for this time of year. It’s small, but it’s clean.
Friday morning the 21st builds a little, with 5ft from the south-southwest under a glassy sky. The energy is up to a moderate 493, and it’s looking like a fun little session.
Saturday morning the 22nd is glassy again, with 3ft from the south and moderate energy (326).
Now, for the standout. Skip ahead to Sunday morning, the 23rd of August. The swell drops to a tiny 1ft, but the period is a very long 19 seconds – that’s pure groundswell. The energy is still moderate (367), and it’s dead glassy. This is a point break or reef wave kind of swell. It’s tiny, but if you’ve got the right board, it’ll be some of the most perfectly shaped waves you’ll see.
Monday morning the 24th is a repeat: glassy, 2ft, and a long 18-second period.
But the real hero of the forecast arrives on Saturday the 29th of August. Saturday morning is glassy with a 4ft swell from the southwest, a 16-second period, and strong energy (919). The afternoon builds to 5ft with even stronger energy (1081), but the wind shifts onshore. The morning is your window.
Sunday the 30th is also a beauty. The morning is clean with a slight cross-offshore breeze, 5ft from the southwest, and strong energy (857).
Monday the 31st of August and Tuesday the 1st of September also have glassy mornings with 4ft and 4ft from the south-southwest. Consistent, clean, and fun.
The real standout is the whole week starting Saturday the 29th. The mornings are glassy or clean, with good-sized, long-period swell from the southwest. The 4ft to 5ft range is perfect for intermediate and advanced surfers. The crowd situation at Cabo Blanco can be “sometimes” busy, so it might get a bit of a crew on those good days, but it’s worth it.
So, to sum it up: the first week is a slow grind with a few glassy, small windows. The second week, starting Saturday the 29th of August, is where the real deal is. Don’t sleep on those glassy mornings.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Wed afternoon. Warm (max 29°C on Thu morning, min 26°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 40mm), heaviest during Sat afternoon. Warm (max 29°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 | 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 | SW 16 | SSW 16 | SSW 15 |
Wave Graph | ||||||||||||||||||||
214 | 163 | 166 | 319 | 512 | 463 | 430 | 265 | 204 | 196 | 150 | 133 | 168 | 216 | 155 | 202 | 274 | 129 | 171 | 158 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | glassy | on | cross | glassy | on | cross-on | glassy | on | glassy | glassy | on | glassy | glassy | on | glassy | glassy | cross-on | glassy |
High Tide | 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 | 1:56PM2.43m | 2:34AM2.42m | |||||||
Low Tide | 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 | 7:47AM0.96m | 8:18PM0.67m | ||||||||
— | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | |
6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | |
mm | 10 | 2 | — | 8 | 1 | — | — | 1 | 3 | 14 | 5 | — | 3 | 6 | — | 6 | 5 | 1 | 11 | 9 |
Temp °C | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 25 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 25 |
Feels °C | 32 | 32 | 32 | 33 | 32 | 33 | 33 | 33 | 33 | 33 | 28 | 32 | 32 | 31 | 32 | 32 | 32 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | 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 | S 9 | S 7 | SSW 7 | SSW 6 |
146 | 163 | 166 | 319 | 512 | 463 | 430 | 265 | 204 | 196 | 150 | 113 | 113 | 110 | 117 | 90 | 76 | 48 | 73 | 107 | |
Swell 2 Height (m) Direction Period (s) | 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 | SW 12 | SSW 17 | SW 16 | SW 16 | SSW 16 | SSW 15 |
214 | 160 | 116 | 47 | 14 | 30 | 30 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 274 | 129 | 171 | 158 | |
Swell 3 Height (m) Direction Period (s) | — | S 14 | S 13 | WSW 5 | SW 16 | — | SW 15 | S 11 | WSW 6 | SSW 20 | SW 20 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 12 | SW 12 | SW 12 | SW 11 | SW 11 |
— | 4 | 29 | 3 | 10 | — | 8 | 38 | 3 | 38 | 60 | 133 | 168 | 114 | 155 | 57 | 36 | 36 | 30 | 30 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | WSW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 0 | 0 | 143 | 15 | 0 | 111 | 7 | 0 | 16 | 0 | 0 | 152 | 0 | 0 | 152 | 0 | 0 | 16 | 0 |
Best forecast wave conditions in Golfo Dulce | ||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











