Surf Forecasts:
Cabo Blanco surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 1AM (local time) - 3ft (0.9m), 16s period, SW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 4.5ft (1.4m), 12s period, SSW swell with 530 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4AM (local time) - 3ft (0.9m), 14s 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 Tuesday (Aug 18) at 4AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.0m and 7s. 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 (Tue 18th Aug) | 3ft (0.9m) 14s |
| Best Surf | 1AM (Wed 19th Aug) | 3ft (0.9m) 16s |
| 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
Alright folks, Rusty here. Let's have a look at what's on the menu for Cabo Blanco. The water’s sitting at a very unusual 87°, which is much warmer than normal for this time of year – feels like bathwater out there.
We've got a bit of a slow start, with nothing really happening on the 17th. The first real action kicks off on the morning of the 18th. It’s small, but clean. The wind goes glassy, and we’re looking at a consistent 3ft of swell from the southwest with a long 14-second period. The energy is moderate at 434, and those conditions should give you some fun little lines. The morning of the 19th is much the same story – glassy, 2ft from the southwest with a 15-second period, and the energy stays healthy.
Now, Thursday the 20th is where it starts to get interesting. The morning is glassy again with 3ft from the south-southwest, and by the afternoon the swell pushes up to 4ft with a solid 11-second period. The energy jumps to 453. Friday the 21st is the true standout of this first week. We’re looking at a clean 5ft from the south-southwest, 11-second period, and a combined energy of 485. With the wind going dead calm in the morning, this is your best bet for the best shaped, cleanest waves of the period. This is where you want to be.
Saturday the 22nd is a bit smaller at 3ft from the south, but still worth a paddle in the morning with glassy conditions. Things get a little messy on the Sunday afternoon, but the mornings stay clean. The swell drops right down from the 23rd through the 26th, with heights hovering around 2ft to 2ft. The mornings offer clean, glassy conditions, but it’s small. By the 27th, the swell tries to pick up with a 3ft from the south-southwest, but the period is a short 6 seconds, and the energy is low at 141, so it’s not going to be great.
Looking further out, the end of August and start of September shows some promise, but it's a way off. The morning of the 30th is looking very promising with 4ft from the southwest, a 15-second period, and very strong energy of 923. Glassy conditions will make it a clean session. The 31st and 1st of September also look good in the mornings, with the 1st showing clean conditions and a cross-offshore wind. That longer-range stuff is one to keep an eye on, but don't lock it in just yet.
So, for the best on offer, lock in Friday the 21st of August for the cleanest, punchiest surf, or the morning of Thursday the 20th as a solid backup.
Rusty out.
Short Range ForecastHeavy rain (total 35mm), heaviest during Mon night. Warm (max 28°C on Tue morning, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Sat afternoon. Warm (max 29°C on Fri morning, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 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 |
Wave Graph | ||||||||||||||||||||
280 | 268 | 288 | 258 | 362 | 217 | 214 | 163 | 166 | 394 | 512 | 455 | 447 | 270 | 204 | 196 | 154 | 121 | 168 | 216 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | glassy | glassy | glassy | glassy | on | cross-off | glassy | glassy | cross | glassy | on | cross | glassy | cross-on | cross | glassy | cross-on | glassy |
High Tide | 7:01PM2.80m | 7:21AM2.92m | 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 | |||||||
Low Tide | 1:06AM0.39m | 1:39PM0.45m | 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 | ||||||||
— | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | |
6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | |
mm | 10 | 11 | 1 | 4 | — | — | 2 | 6 | 1 | 4 | — | — | — | 1 | — | 4 | 1 | 1 | 6 | 4 |
Temp °C | 27 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 29 | 27 | 29 | 28 | 27 | 29 | 29 | 27 |
Feels °C | 31 | 29 | 33 | 32 | 31 | 33 | 32 | 30 | 32 | 33 | 30 | 33 | 32 | 32 | 32 | 31 | 31 | 33 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | S 7 | SSW 8 | 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 10 | S 10 |
136 | 83 | 123 | 99 | 137 | 129 | 143 | 163 | 166 | 394 | 512 | 455 | 447 | 270 | 204 | 196 | 154 | 113 | 115 | 115 | |
Swell 2 Height (m) Direction Period (s) | 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 |
280 | 268 | 288 | 258 | 362 | 217 | 214 | 160 | 116 | 47 | 14 | 30 | 30 | 127 | 119 | 142 | 134 | 121 | 116 | 216 | |
Swell 3 Height (m) Direction Period (s) | S 10 | WSW 6 | S 13 | S 12 | NW 8 | WSW 6 | — | S 14 | S 13 | SW 18 | SW 16 | — | SW 15 | S 11 | SSW 21 | SW 20 | SW 20 | SW 19 | SW 18 | SSW 13 |
18 | 15 | 3 | 3 | 2 | 3 | — | 4 | 29 | 12 | 10 | — | 8 | 38 | 44 | 61 | 60 | 96 | 168 | 114 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | 0 | 0 | 15 | 0 | 143 | 7 | 0 | 15 | 15 | 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.











