Surf Forecasts:
Cabo Blanco surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (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, 10PM (local time) - 4.5ft (1.3m), 12s 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 10PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.3m and 13s. 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 glassy at the time the swell arrives.
| Wave Type | Time (EST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 4.5ft (1.3m) 12s |
| Best Surf | 1AM (Fri 21st 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 on the menu for the next couple of weeks.
We’ve got a solid run of clean, glassy mornings coming up for Cabo Blanco, but the afternoons are a bit of a mess with those risk of thunderstorms and onshore breezes. The water is sitting at 87°, which is much warmer than normal for this time of year, so you can leave the wetsuit at home.
The standout session is Thursday morning, the 20th of August. It’s going to be dead calm, glassy as a mirror, with a 3ft SSW swell pushing in at 10 seconds. The combined energy is moderate at 311, and it’s going to be a real cruisey, clean session. Perfect for a longboard or a funboard.
Friday morning, the 21st, is also a beauty. The swell picks up a notch to 5ft from the SSW, still with a 11-second period, and the wind is totally off. The energy is up to 499, making it the most powerful of the early sessions. That’s the pick of the weekend for a bit more push.
The following week, things get a bit weird. A long-period SW groundswell (18 seconds) rolls in on Sunday the 23rd and Monday the 24th, but the size drops right off to 2ft. That long period will make for some silky, lined-up waves, but it’s going to be pretty small. That kind of period can make a beach break like this a bit straight, but with the glassy mornings, it’ll still be worth a paddle.
The real highlight of the whole forecast is the 30th of August. Saturday morning sees a 5ft SW swell with a period of 15 seconds, and the wind is a clean cross-off from the ESE. The combined energy is a massive 841 – that’s proper strong energy. This is the one to circle on the calendar. It’s a bit further out, so be patient, but it looks like the best quality window of the whole run.
The 31st of August and 1st of September are also solid with 4ft SSW swells, glassy mornings, and strong energy (590 and 552). That whole weekend is looking very promising.
After that, the swell backs off again, but the 4th of September Friday morning has a clean cross-off wind and a 3ft, 18-second SW groundswell. The energy is 574, so even though it’s a smaller day, the quality should be top-notch.
So, to sum it up: the early glassy mornings are your best bet for clean, fun waves. The 20th and 21st are the best immediate options. The 30th of August is the real standout, but it’s a long-range call, so keep your fingers crossed. If you’re a beginner, stick to the mornings under 5ft. The afternoons are mostly a write-off due to the wind and storms.
Stay stoked,
Rusty
Short Range ForecastHeavy rain (total 48mm), heaviest during Sat night. Warm (max 29°C on Thu morning, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 29mm), heaviest during Tue afternoon. Warm (max 29°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 10 | SSW 14 | SW 18 | SSW 18 | SW 18 | SSW 17 | SW 16 | SW 16 | SSW 16 | SSW 15 | SW 15 | SW 15 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 166 | 319 | 512 | 463 | 430 | 265 | 204 | 160 | 150 | 142 | 168 | 216 | 155 | 202 | 274 | 129 | 171 | 158 | 106 | 104 | 81 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | on | cross | glassy | on | cross-on | glassy | cross-on | glassy | glassy | on | cross | glassy | cross-on | glassy | glassy | on | glassy |
High Tide | 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 | 2:41PM2.56m | 3:13AM2.60m | ||||||||
Low Tide | 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 | 8:34AM0.81m | 8:58PM0.54m | ||||||||
 |  |  |  | |  | | | | | | | | | | | | |  | | | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — |
mm | 1 | 4 | 1 | — | 1 | 1 | 2 | 12 | 26 | 1 | 2 | 3 | 1 | 5 | 2 | 1 | 9 | 5 | — | 6 | 13 |
Temp °C | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 25 | 28 | 28 | 27 | 29 | 28 | 26 | 28 | 28 | 25 | 28 | 28 | 25 |
Feels °C | 33 | 33 | 32 | 32 | 32 | 32 | 33 | 33 | 29 | 32 | 32 | 32 | 33 | 31 | 30 | 31 | 31 | 29 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | S 10 | SSW 10 | SSW 10 | S 9 | SSW 9 | SSW 9 | SSW 10 | S 10 | S 9 | S 9 | SSW 7 | SSW 6 | SSW 6 | SSW 6 | WSW 6 |
| kJ | 166 | 319 | 512 | 463 | 430 | 265 | 204 | 160 | 150 | 142 | 147 | 144 | 123 | 117 | 76 | 55 | 45 | 43 | 57 | 78 | 47 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | S 12 | SW 19 | WSW 6 | WSW 6 | 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 | SW 15 | SW 15 | S 6 |
| kJ | 116 | 47 | 14 | 6 | 6 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | 73 | 202 | 274 | 129 | 171 | 158 | 106 | 104 | 39 |
Swell 3 Height (m) Direction Period (s) | S 13 | WSW 5 | SW 16 | SSW 18 | SSW 18 | S 11 | SSW 21 | SW 20 | SW 20 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SSW 10 | SSW 14 |
| kJ | 29 | 3 | 10 | 30 | 30 | 38 | 44 | 61 | 60 | 133 | 168 | 114 | 155 | 57 | 36 | 36 | 30 | 30 | 30 | 11 | 81 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 143 | 0 | 0 | 152 | 7 | 0 | 167 | 15 | 0 | 7 | 0 | 0 | 152 | 7 | 0 | 15 | 0 | 0 | 111 | 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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